'OBD2'에 해당되는 글 14건
- 2009.01.14 OBD-II Trouble Code - P0174
- 2009.01.14 OBD-II Trouble Code - P0401
- 2009.01.14 OBD-II Trouble Code - P0300 (Cylinder Misfire)
- 2009.01.14 OBD-II Trouble Code - P0420
- 2009.01.14 OBD-II Trouble Code - P0174
- 2009.01.14 OBD 2 PIDs
- 2008.11.16 FAQ: What is OBD?
- 2008.11.14 OBD Chip Schematic 1
- 2008.11.14 FAQ: OBD2 Codes Explained
- 2008.11.14 Isuzu Specific Trouble Codes 1
Technical Description
System Too Lean (Bank 2)
What does that mean?
Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.
Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
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Symptoms
You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.
Causes
A code P0174 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions
Possible solutions include:
* In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
* Inspect all vacuum and PCV hoses, replace if necessary
* Check for a dirty fuel filter and proper fuel pressure
Technical Description
Insufficient EGR Flow
What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.
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Symptoms
You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.
Causes
A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum
Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
* Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
* Clean out the EGR valve and/or tubing to remove deposits
* Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
* Replace the DPFE sensor (with a good quality / OEM one)
* Replace the EGR valve
Technical Description
Random/Multiple Cylinder Misfire Detected
What does that mean?
Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.
A P0300 OBD code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
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Symptoms
Symptoms may include:
* the engine may be harder to start
* the engine may stumble / stumble, and/or hesitate
* other symptoms may also be present
Causes
A code P0300 may mean that one or more of the following has happened:
* Faulty spark plugs or wires
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector(s)
* Burned exhaust valve
* Faulty catalytic converter(s)
* Stuck/blocked EGR valve / passages
* Faulty camshaft position sensor
* Defective computer
Possible Solutions
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Technical Description
Catalyst System Efficiency Below Threshold (Bank 1)
What does that mean?
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
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Symptoms
You will likely not notice any drivability problems, although there may be symptoms.
Causes
A code P0420 may mean that one or more of the following has happened:
* Leaded fuel was used where unleaded was called for
* An oxygen sensor is not reading (functioning) properly
* The engine coolant temperature sensor is not working properly
* Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
* Retarded spark timing
* The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible Solutions
Some suggested steps for troubleshooting a P0420 code include:
* Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
* Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
* Inspect the downstream heated oxygen sensor (HO2), replace if necessary
* Replace the catalytic converter
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
Technical Description
System Too Lean (Bank 1)
What does that mean?
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.
Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.
Symptoms
You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.
Causes
A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions
Possible solutions include:
* In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
* Inspect all vacuum and PCV hoses, replace if necessary
* Check for a dirty fuel filter and proper fuel pressure
The table below shows the standard OBD-II PIDs as defined by SAE J1979. The expected response for each PID is given, along with information on how to translate the response into meaningful data. Again, not all vehicles will support all PIDs and there can be manufacturer-defined custom PIDs that are not defined in the OBD-II standard.
Note that modes 1 and 2 are basically identical, except that Mode 1 provides current information, whereas Mode 2 provides a snapshot of the same data taken at the point when the last diagnostic trouble code was set. The exceptions are PID 01, which is only available in Mode 1, and PID 02, which is only available in Mode 2. If Mode 2 PID 02 returns zero, then there is no snapshot and all other Mode 2 data is meaningless.
Mode (hex) |
PID (hex) |
Data bytes returned | Description | Min value | Max value | Units | Formula |
---|---|---|---|---|---|---|---|
01 | 00 | 4 | PIDs supported | Bit encoded [A7..D0] == [PID 0x01..PID 0x20] | |||
01 | 01 | 4 | Monitor status since DTCs cleared. (Includes malfunction indicator lamp (MIL) status and number of DTCs.) | Bit encoded. See below. | |||
01 | 02 | 8 | Freeze DTC | ||||
01 | 03 | 2 | Fuel system status | Bit encoded. See below. | |||
01 | 04 | 1 | Calculated engine load value | 0 | 100 | % | A*100/255 |
01 | 05 | 1 | Engine coolant temperature | -40 | 215 | °C | A-40 |
01 | 06 | 1 | Short term fuel % trim?Bank 1 | -100 (Rich) | 99.22 (Lean) | % | (A-128) * 100/128 |
01 | 07 | 1 | Long term fuel % trim?Bank 1 | -100 (Rich) | 99.22 (Lean) | % | (A-128) * 100/128 |
01 | 08 | 1 | Short term fuel % trim?Bank 2 | -100 (Rich) | 99.22 (Lean) | % | (A-128) * 100/128 |
01 | 09 | 1 | Long term fuel % trim?Bank 2 | -100 (Rich) | 99.22 (Lean) | % | (A-128) * 100/128 |
01 | 0A | 1 | Fuel pressure | 0 | 765 | kPa (gauge) | A*3 |
01 | 0B | 1 | Intake manifold pressure | 0 | 255 | kPa (absolute) | A |
01 | 0C | 2 | Engine RPM | 0 | 16,383.75 | rpm | ((A*256)+B)/4 |
01 | 0D | 1 | Vehicle speed | 0 | 255 | km/h | A |
01 | 0E | 1 | Timing advance | -64 | 63.5 | ° relative to #1 cylinder | A/2 - 64 |
01 | 0F | 1 | Intake air temperature | -40 | 215 | °C | A-40 |
01 | 10 | 2 | MAF air flow rate | 0 | 655.35 | g/s | ((256*A)+B) / 100 |
01 | 11 | 1 | Throttle position | 0 | 100 | % | A*100/255 |
01 | 12 | 1 | Commanded secondary air status | Bit encoded. See below. | |||
01 | 13 | 1 | Oxygen sensors present | [A0..A3] == Bank 1, Sensors 1-4. [A4..A7] == Bank 2... | |||
01 | 14 | 2 | Bank 1, Sensor 1: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 15 | 2 | Bank 1, Sensor 2: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 16 | 2 | Bank 1, Sensor 3: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 17 | 2 | Bank 1, Sensor 4: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 18 | 2 | Bank 2, Sensor 1: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 19 | 2 | Bank 2, Sensor 2: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 1A | 2 | Bank 2, Sensor 3: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 1B | 2 | Bank 2, Sensor 4: Oxygen sensor voltage, Short term fuel trim |
0 0 |
1.275 99.2 |
Volts % |
A * 0.005 (B-128) * 100/128 (if B==0xFF, sensor is not used in trim calc) |
01 | 1C | 1 | OBD standards this vehicle conforms to | Bit encoded. See below. | |||
01 | 1D | 1 | Oxygen sensors present | Similar to PID 13, but [A0..A7] == [B1S1, B1S2, B2S1, B2S2, B3S1, B3S2, B4S1, B4S2] | |||
01 | 1E | 1 | Auxiliary input status | A0 == Power Take Off (PTO) status (1 == active) [A1..A7] not used |
|||
01 | 1F | 2 | Run time since engine start | 0 | 65,535 | seconds | (A*256)+B |
01 | 20 | 4 | PIDs supported 21-40 | Bit encoded [A7..D0] == [PID 0x21..PID 0x40] | |||
01 | 21 | 2 | Distance traveled with malfunction indicator lamp (MIL) on | 0 | 65,535 | km | (A*256)+B |
01 | 22 | 2 | Fuel Rail Pressure (relative to manifold vacuum) | 0 | 5177.265 | kPa | ((A*256)+B) * 0.079 |
01 | 23 | 2 | Fuel Rail Pressure (diesel) | 0 | 655350 | kPa (gauge) | ((A*256)+B) * 10 |
01 | 24 | 4 | O2S1_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 25 | 4 | O2S2_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 26 | 4 | O2S3_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 27 | 4 | O2S4_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 28 | 4 | O2S5_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 29 | 4 | O2S6_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 2A | 4 | O2S7_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 2B | 4 | O2S8_WR_lambda(1): Equivalence Ratio Voltage |
0 0 |
2 8 |
N/A V |
((A*256)+B)*0.0000305 ((C*256)+D)*0.000122 |
01 | 2C | 1 | Commanded EGR | 0 | 100 | % | 100*A/255 |
01 | 2D | 1 | EGR Error | -100 | 99.22 | % | A*0.78125 - 100 |
01 | 2E | 1 | Commanded evaporative purge | 0 | 100 | % | 100*A/255 |
01 | 2F | 1 | Fuel Level Input | 0 | 100 | % | 100*A/255 |
01 | 30 | 1 | # of warm-ups since codes cleared | 0 | 255 | N/A | A |
01 | 31 | 2 | Distance traveled since codes cleared | 0 | 65,535 | km | (A*256)+B |
01 | 32 | 2 | Evap. System Vapor Pressure | -8,192 | 8,192 | Pa | ((A*256)+B)/4 - 8,192 |
01 | 33 | 1 | Barometric pressure | 0 | 255 | kPa (Absolute) | A |
01 | 34 | 4 | O2S1_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 35 | 4 | O2S2_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 36 | 4 | O2S3_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 37 | 4 | O2S4_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 38 | 4 | O2S5_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 39 | 4 | O2S6_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 3A | 4 | O2S7_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 3B | 4 | O2S8_WR_lambda(1): Equivalence Ratio Current |
0 -128 |
2 128 |
N/A mA |
((A*256)+B)*0.0000305 ((C*256)+D)*0.00390625 - 128 |
01 | 3C | 2 | Catalyst Temperature Bank 1, Sensor 1 |
-40 | 6,513.5 | °C | ((A*256)+B)/10 - 40 |
01 | 3D | 2 | Catalyst Temperature Bank 2, Sensor 1 |
-40 | 6,513.5 | °C | ((A*256)+B)/10 - 40 |
01 | 3E | 2 | Catalyst Temperature Bank 1, Sensor 2 |
-40 | 6,513.5 | °C | ((A*256)+B)/10 - 40 |
01 | 3F | 2 | Catalyst Temperature Bank 2, Sensor 2 |
-40 | 6,513.5 | °C | ((A*256)+B)/10 - 40 |
01 | 40 | 4 | PIDs supported 41-60 | Bit encoded [A7..D0] == [PID 0x41..PID 0x60] | |||
01 | 41 | 4 | Monitor status this drive cycle | Bit encoded. See below. | |||
01 | 42 | 2 | Control module voltage | 0 | 65.535 | V | ((A*256)+B)/1000 |
01 | 43 | 2 | Absolute load value | 0 | 25,700 | % | ((A*256)+B)*100/255 |
01 | 44 | 2 | Command equivalence ratio | 0 | 2 | N/A | ((A*256)+B)*0.0000305 |
01 | 45 | 1 | Relative throttle position | 0 | 100 | % | A*100/255 |
01 | 46 | 1 | Ambient air temperature | -40 | 215 | °C | A-40 |
01 | 47 | 1 | Absolute throttle position B | 0 | 100 | % | A*100/255 |
01 | 48 | 1 | Absolute throttle position C | 0 | 100 | % | A*100/255 |
01 | 49 | 1 | Accelerator pedal position D | 0 | 100 | % | A*100/255 |
01 | 4A | 1 | Accelerator pedal position E | 0 | 100 | % | A*100/255 |
01 | 4B | 1 | Accelerator pedal position F | 0 | 100 | % | A*100/255 |
01 | 4C | 1 | Commanded throttle actuator | 0 | 100 | % | A*100/255 |
01 | 4D | 2 | Time run with MIL on | 0 | 65,535 | minutes | (A*256)+B |
01 | 4E | 2 | Time since trouble codes cleared | 0 | 65,535 | minutes | (A*256)+B |
01 | 51 | 1 | Fuel Type | From fuel type table see below | |||
01 | 52 | 1 | Ethanol fuel % | 0 | 100 | % | A*100/255 |
01 | C3 | ? | ? | ? | ? | ? | Returns numerous data, including Drive Condition ID and Engine Speed* |
01 | C4 | ? | ? | ? | ? | ? | B5 is Engine Idle Request B6 is Engine Stop Request* |
02 | 02 | 2 | Freeze frame trouble code | BCD encoded, See below. | |||
03 | N/A | n*6 | Request trouble codes | 3 codes per message frame, BCD encoded. See below. | |||
04 | N/A | 0 | Clear trouble codes / Malfunction indicator lamp (MIL) / Check engine light | Clears all stored trouble codes and turns the MIL off. | |||
05 | 0100 | OBD Monitor IDs supported ($01 - $20) | |||||
05 | 0101 | O2 Sensor Monitor Bank 1 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0102 | O2 Sensor Monitor Bank 1 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0103 | O2 Sensor Monitor Bank 1 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0104 | O2 Sensor Monitor Bank 1 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0105 | O2 Sensor Monitor Bank 2 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0106 | O2 Sensor Monitor Bank 2 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0107 | O2 Sensor Monitor Bank 2 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0108 | O2 Sensor Monitor Bank 2 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0109 | O2 Sensor Monitor Bank 3 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 010A | O2 Sensor Monitor Bank 3 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 010B | O2 Sensor Monitor Bank 3 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 010C | O2 Sensor Monitor Bank 3 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 010D | O2 Sensor Monitor Bank 4 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 010E | O2 Sensor Monitor Bank 4 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 010F | O2 Sensor Monitor Bank 4 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0110 | O2 Sensor Monitor Bank 4 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Rich to lean sensor threshold voltage | |
05 | 0201 | O2 Sensor Monitor Bank 1 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0202 | O2 Sensor Monitor Bank 1 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0203 | O2 Sensor Monitor Bank 1 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0204 | O2 Sensor Monitor Bank 1 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0205 | O2 Sensor Monitor Bank 2 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0206 | O2 Sensor Monitor Bank 2 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0207 | O2 Sensor Monitor Bank 2 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0208 | O2 Sensor Monitor Bank 2 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0209 | O2 Sensor Monitor Bank 3 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 020A | O2 Sensor Monitor Bank 3 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 020B | O2 Sensor Monitor Bank 3 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 020C | O2 Sensor Monitor Bank 3 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 020D | O2 Sensor Monitor Bank 4 Sensor 1 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 020E | O2 Sensor Monitor Bank 4 Sensor 2 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 020F | O2 Sensor Monitor Bank 4 Sensor 3 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
05 | 0210 | O2 Sensor Monitor Bank 4 Sensor 4 | 0.00 | 1.275 | Volts | 0.005 Lean to Rich sensor threshold voltage | |
09 | 02 | 5x5 | Vehicle identification number (VIN) | Returns 5 lines, A is line ordering flag, B-E ASCII coded VIN digits. |
In the formula column, letters A, B, C, etc. represent the decimal equivalent of the first, second, third, etc. bytes of data. Where a (?) appears, contradictory or incomplete information was available. Someone with a copy of the 2006 SAE HS-3000 should fact-check these.
OBD stands for On-Board Diagnostics. OBD-II (OBD two) is the latest industry standard, which was introduced on 1996 vehicle models. It provides monitoring of nearly all engine controls, and also some other parts of the vehicle (chassis, body, etc.).
The most useful part of OBD to most drivers is the ability to read information from the vehicle. You can read trouble codes, and even monitor real-time statistics such as RPM, vehicle speed, etc. There are a variety of different devices on the market ranging from basic code scanners to advanced displays that calculate MPG as you drive. Check out the Links section of this site for more information on available products.
For information on what an OBD code is, go to this FAQ article..
http://www.obd-codes.com/
OBD-2 universal cable scheme forPWM,VPW, andISO 9141-2 vehicles pinout
This device is a CMOS microcontroller which is designed to interface a personal computer or laptop with a vehicle"s On Board Diagnostic (OBD II) interface. It is intended to function with all three of the protocols used by vehicle manufacturers to implement the OBD II system as defined by SAE and ISO specifications. The OBD II system became mandatory for 1996 and up vehicles, but some vehicles were already fully or partially compatible with OBD II requirements prior to 1996. The chip is not suitable for the earlier vehicles such as OBD I. The device is intended to function as a simple scan tool and is capable of sending and receiving any OBD II message defined in SAE J1979 for any of the three types of OBDII bus implementations (PWM, VPW, ISO 9141-2). It can also be used as an inexpensive interface for custom instrumentation monitoring various vehicle parameters such as speed, RPM, coolant or intake air temperature, engine load, intake air flow rate, etc.
Components:
C5, C6 .01 UF, 25V C4 .1 UF, 25V C3 .47 UF, 50V C2,C1 20 pf, 50V R11, R12, R23, R9, R1, R3, R4, R25, R8 10 KOhm, 1/4 Watt R24 18 KOhm, 1/4 W R19, R18, R7, R20, R22, R5, R6, R13 1 KOhm, 1/4 W R21 5.6 KOhm, 1/4 W R16, R17 510 Ohm, 1/4 W R10 62 KOhm, 1/4 W R15 9.1 KOhm, 1/4 W R14 270 Ohm, 1/2 W R2 - Not used D2 1N4739 Zener, 9.1V, 1W D1, D3 1N4148 Diode Q3, Q4, Q5 PN2222 Transistor, NPN Q2 PN3904 Transistor, NPN Q1 PN3906 Transistor, PNP IC2 7805 Regulator, 5V IC3 LM339N Quad Comparator IC1 16F84-20 Microprocessor (firmware 1.07) XTL 1 20 MHz Crystal, 20 Mhz
If you don"t use PWM, you can omit R4, R6, R7, R8, R9, R10, Q1, Q2, D1.
If you don"t use ISO, you can omit R15, R16, R17, R18, R19, R21, Q4, Q5
If you don"t use VPW, you can omit R13, R14, R23, R24, D2, D3, Q3
Don"t connect external power sources - all power direved from pin 16 of OBDII
Serial port works at 19200 baud
Scheme is unuseful without .hex for IC1 firmware 1.07...
Can be replaced using scheme with ELM327 chip (http://www.elmelectronics.com/DSheets/ELM327DS.pdf). ELM327 even prvides more protocols, including CAN.
FAQ: OBD2 Codes Explained.
OBD-II codes consist of a number of parts. Here is a sample OBD2 code:
P0171
Here is a breakdown of what each digit of the code means:
First Character - System
The first character identifies identifies the system related to the trouble code.
- P = Powertrain
- B = Body
- C = Chassis
- U = Undefined
Second Digit - Code Type
The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.
- 0 = Generic (this is the digit zero -- not the letter "O")
- 1 = Enhanced (manufacturer specific)
Third Digit - Sub-System
The third digit denotes the type of sub-system that pertains to the code
- 1 = Emission Management (Fuel or Air)
- 2 = Injector Circuit (Fuel or Air)
- 3 = Ignition or Misfire
- 4 = Emission Control
- 5 = Vehicle Speed & Idle Control
- 6 = Computer & Output Circuit
- 7 = Transmission
- 8 = Transmission
- 9 = SAE Reserved
- 0 = SAE Reserved
Fourth and Fifth Digits
These digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1). To lookup your particular code, visit our OBD Trouble Codes section.
Isuzu Specific Trouble Codes.
Code | Description |
---|---|
P1106
| MAP Circuit Intermittent Voltage High |
P1107
| MAP Circuit Intermittent Voltage Low |
P1108
| Barometric Pressure Circuit Input High |
P1111
| IAT Sensor Circuit Intermittent Voltage High |
P1112
| IAT Sensor Circuit Intermittent Voltage Low |
P1114
| ECT Sensor Circuit Intermittent Voltage Low |
P1115
| ECT Sensor Circuit Intermittent Voltage High |
P1121
| TP Sensor Circuit Intermittent Voltage High |
P1122
| TP Sensor Circuit Intermittent Voltage Low |
P1133
| H02S Insufficient Switching Bank 1 Sensor 1 |
P1134
| H02S Transition Time Ratio Bank 1 Sensor 1 |
P1153
| H02S Insufficient Switching Bank 2 Sensor 1 |
P1154
| H02S Transition Time Ratio Bank 2 Sensor 1 |
P1171
| Fuel System Lean During Acceleration |
P1297
| Electrical Load Detector Circuit Input Low |
P1298
| Electrical Load Detector Circuit Input High |
P1300
| Random Misfire |
P1336
| CKP System Variation Not Learned |
P1359
| CKP/TDC Sensor Disconnected |
P1361
| TDC Sensor Intermittent Interruption |
P1362
| TDC Sensor No Signal |
P1380
| ABS Rough Road System Fault |
P1381
| Cylinder Position Sensor Intermittent Interruption, Misfire Detected (Except 1998 Rodeo) |
P1381
| ABS Rough Road Class 2 Serial Data Fault Or Link Error (1998 Rodeo) |
P1382
| Cylinder Position Sensor No Signal |
P1390
| G Sensor Circuit Intermittent Voltage Low |
P1391
| G Sensor Performance |
P1392
| G Sensor Voltage Low |
P1393
| G Sensor Voltage High |
P1394
| G Sensor Intermittent Voltage High |
P1404
| EGR Valve Stuck Closed |
P1406
| EGR Valve Pintle Position Circuit |
P1441
| EVAP System Flow During Non-Purge |
P1442
| EVAP Vacuum Switch Voltage High During Ignition On |
P1459
| EVAP Emission Purge Flow Switch Malfunction |
P1491
| EGR Valve Lift Insufficient Detected |
P1498
| EGR Valve Lift Sensor Voltage High |
P1508
| IAC System RPM Low |
P1509
| IAC System RPM High |
P1546
| A/C Compressor Clutch Output Circuit Malfunction |
P1548
| A/C Compressor Clutch Output Circuit Malfunction |
P1607
| PCM Internal Circuit Failure ‘‘A’’ |
P1618
| SPI Communications Error |
P1625
| PCM Unexpected Reset |
P1627
| PCM A/D Conversion Malfunction |
P1635
| 5 Volt Reference Voltage Circuit Malfunction |
P1640
| ODM 1 Input Voltage High (Except 1998 Rodeo) |
P1640
| ODM Output ‘‘A’’ Circuit Fault (1998 Rodeo) |
P1650
| Quad Driver Module ‘‘A’’ Fault |
P1790
| Trans ROM Checksum Error |
P1792
| Trans EEPROM Checksum Error |
P1835
| Trans Kickdown Switch Malfunction |
P1850
| Brake Band Apply Solenoid Malfunction |
P1860
| TCC PWM Solenoid Circuit Failure |
P1870
| Transmission Component Slipping |