Volkswagen Cars 2000-05

2.0L L4 VIN A Auto 2

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Trouble Code: P0170



Fuel System Malfunction (Cylinder Bank 1)

Possible Causes:



Air leaks after the MAF sensor, or leaks in the PCV system
 
Exhaust leaks before or near where the HO2S is mounted
 
Fuel injector(s) restricted or not supplying enough fuel
 
Fuel system not supplying enough fuel during high fuel demand conditions (e.g., the fuel pump may not supply enough fuel)
 
Leaking EGR gasket, or leaking EGR valve diaphragm
 
MAF sensor dirty (causes ECM to underestimate airflow)
 
Vehicle running out of fuel or engine oil dip stick not seated
 

Trouble Code: P0171



Fuel System Too Lean (Cylinder Bank 1)

Possible Causes:



Air leaks after the MAF sensor, or leaks in the PCV system
 
Exhaust leaks before or near where the HO2S is mounted
 
Fuel injector(s) restricted or not supplying enough fuel
 
Fuel pump not supplying enough fuel during high fuel demand conditions
 
Leaking EGR gasket, or leaking EGR valve diaphragm
 
MAF sensor dirty (causes ECM to underestimate airflow)
 
Vehicle running out of fuel or engine oil dip stick not seated
 

Trouble Code: P0172



Fuel System Too Rich (Cylinder Bank 1)

Possible Causes:



Camshaft timing is incorrect, or the engine has an oil overfill condition
 
EVAP vapor recovery system failure (may be pulling vacuum)
 
Fuel pressure regulator is damaged or leaking
 
HO2S element is contaminated with alcohol or water
 
MAF or MAP sensor values are incorrect or out-of-range
 
One of more fuel injectors is leaking
 

Trouble Code: P0201



Cylinder 1 Injector Circuit Malfunction

Possible Causes:



Injector 1 connector is damaged, open or shorted
 
Injector 1 control circuit is open, shorted to ground or to power
 
ECM has failed (the injector driver circuit may be damaged)
 

Trouble Code: P0202



Cylinder 2 Injector Circuit Malfunction

Possible Causes:



Injector 2 connector is damaged, open or shorted
 
Injector 2 control circuit is open, shorted to ground or to power
 
ECM has failed (the injector driver circuit may be damaged)
 

Trouble Code: P0203



Cylinder 3 Injector Circuit Malfunction

Possible Causes:



Injector 3 connector is damaged, open or shorted
 
Injector 3 control circuit is open, shorted to ground or to power
 
ECM has failed (the injector driver circuit may be damaged)
 

Trouble Code: P0204



Cylinder 4 Injector Circuit Malfunction

Possible Causes:



Injector 4 connector is damaged, open or shorted
 
Injector 4 control circuit is open, shorted to ground or to power
 
ECM has failed (the injector driver circuit may be damaged)
 

Trouble Code: P0219



Engine Over-Speed Condition

Possible Causes:



Engine operated in the wrong transmission gear position
 
Excessive engine speed with gear selector in Neutral position
 
Wheel slippage due to wet, muddy or snowing conditions
 

Trouble Code: P0221



Throttle Position Sensor 'B' Signal Performance

Possible Causes:



Throttle body is damaged
 
Throttle linkage is binding or sticking
 
ETC TP Sensor 'B' signal circuit to the ECM is open
 
ETC TP Sensor 'B' ground circuit is open
 
ETC TP Sensor 'B' is damaged or it has failed
 

Trouble Code: P0222



Throttle Position Sensor 'B' Circuit Low Input

Possible Causes:



ETC TP Sensor 'B' connector is damaged or shorted
 
ETC TP Sensor 'B' signal circuit is shorted to ground
 
ETC TP Sensor 'B' is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0223



Throttle Position Sensor 'B' Circuit High Input

Possible Causes:



ETC TP Sensor 'B' connector is damaged or open
 
ETC TP Sensor 'B' signal circuit is open
 
ETC TP Sensor 'B' signal circuit is shorted to VREF (5v)
 
ETC TP Sensor 'B' is damaged or it has failed
 

Trouble Code: P0226



Throttle Position Sensor 'C' Signal Performance

Possible Causes:



Throttle body is damaged
 
Throttle linkage is binding or sticking
 
ETC TP Sensor 'C' signal circuit to the ECM is open
 
ETC TP Sensor 'C' ground circuit is open
 
ETC TP Sensor 'C' is damaged or it has failed
 

Trouble Code: P0227



Throttle Position Sensor 'C' Circuit Low Input

Possible Causes:



ETC TP Sensor 'C' connector is damaged or shorted
 
ETC TP Sensor 'C' signal circuit is shorted to ground
 
ETC TP Sensor 'C' is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0228



Throttle Position Sensor 'C' Circuit High Input

Possible Causes:



ETC TP Sensor 'C' connector is damaged or open
 
ETC TP Sensor 'C' signal circuit is open
 
ETC TP Sensor 'C' signal circuit is shorted to VREF (5v)
 
ETC TP Sensor 'C' is damaged or it has failed
 

Trouble Code: P0230



Fuel Pump Primary Circuit Malfunction

Possible Causes:



FP or FSV circuit is open or shorted
 
Fuel pump relay VPWR circuit open
 
Fuel pump relay is damaged or has failed
 
Fuel pressure sensor has failed
 
Fuel pump control module is faulty
 
ECM has failed
 

Trouble Code: P0234



Turbo/Supercharger Overboost Condition

Possible Causes:



Ignition misfire condition exceeds the calibrated threshold
 
Knock sensor circuit has failed, or excessive knock detected
 
Low speed fuel pump relay not switching properly
 
Transmission oil temperature beyond the calibrated threshold
 
Shaft bearing of charge pressure regulator valve in turbocharger is blocked
 

Trouble Code: P0235



Turbocharger Boost Sensor (A) Circ Control Limit Not Reached

Possible Causes:



Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0236



Turbocharger Boost Sensor (A) Circ Control Range/Performance

Possible Causes:



Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0237



Turbocharger Boost Sensor (A) Circ Low Input

Possible Causes:



Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0238



Turbocharger Boost Sensor (A) Circ High Input

Possible Causes:



Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0243



Turbocharger Boost Bypass Solenoid (A) Circuit Open/Short Circuit

Possible Causes:



Bypass solenoid power supply circuit is open
 
Bypass solenoid control circuit is open, shorted to ground or system power
 
Bypass solenoid assembly is damaged or has failed
 
Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0245



Turbocharger Boost Bypass Solenoid (A) Circuit Low Input/Short to Ground

Possible Causes:



Bypass solenoid power supply circuit is open
 
Bypass solenoid control circuit is open, shorted to ground or system power
 
Bypass solenoid assembly is damaged or has failed
 
Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0246



Turbocharger Boost Bypass Solenoid (A) Circuit High Input/Short to B+

Possible Causes:



Bypass solenoid power supply circuit is open
 
Bypass solenoid control circuit is open, shorted to ground or system power
 
Bypass solenoid assembly is damaged or has failed
 
Charge air pressure sensor is faulty
 
Voltage supply to the charge air pressure sensor is open or shorted
 
Check the charge air system for leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is damaged or not functioning properly
 
Turbocharger recirculating valve is faulty
 
Vacuum diaphragm for turbocharger is out of adjustment
 
Wastegate bypass regulator valve is faulty
 
Boost sensor has failed
 
ECM has failed
 

Trouble Code: P0261



Cylinder 1 Injector Circuit Low Input/Short to Ground

Possible Causes:



Injector 1 control circuit is open
 
Injector 1 power circuit (B+) is open
 
Injector 1 control circuit is shorted to chassis ground
 
Injector 1 is damaged or has failed
 
ECM is not connected or has failed
 

Trouble Code: P0262



Cylinder 1 Injector Circuit Low Input/Short to B+

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0264



Cylinder 2 Injector Circuit Low Input/Short to Ground

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0265



Cylinder 2 Injector Circuit Low Input/Short to B+

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0267



Cylinder 3 Injector Circuit Low Input/Short to Ground

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0268



Cylinder 3 Injector Circuit Low Input/Short to B+

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0270



Cylinder 4 Injector Circuit Low Input/Short to Ground

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0271



Cylinder 4 Injector Circuit Low Input/Short to B+

Possible Causes:



Injector control circuit is open
 
Injector power circuit (B+) is open
 
Injector control circuit is shorted to chassis ground
 
Injector is damaged or has failed
 
ECM is not connected or has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 
Faulty engine speed sensor
 

Trouble Code: P0299



Turbocharger Underboost

Possible Causes:



Charge air pressure sensor has failed
 
Charge air system has leaks
 
Recirculating valve for turbocharger is faulty
 
Turbocharging system is faulty
 
Vacuum diaphragm for turbocharger needs adjusting
 
Wastegate bypass regulator valve is faulty
 

Trouble Code: P0300



Random/Multiple Misfire Detected

Possible Causes:



Base engine mechanical fault that affects two or more cylinders
 
Fuel metering fault that affects two or more cylinders
 
Fuel pressure too low or too high, fuel supply contaminated
 
EVAP system problem or the EVAP canister is fuel saturated
 
EGR valve is stuck open or the PCV system has a vacuum leak
 
Ignition system fault (coil, plugs) affecting two or more cylinders
 
MAF sensor contamination (it can cause a very lean condition)
 
Vehicle driven while very low on fuel (less than 1/8 of a tank)
 

Trouble Code: P0301



Cylinder Number 1 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or ECM system
 
Base engine mechanical problem
 
Fuel delivery component problem (i.e., a contaminated, dirty or sticking fuel injector)
 
Fuel pump relay defective
 
Ignition coil fuses have failed
 
Ignition system problem (dirty damaged coil or plug)
 
Engine speed (RPM) sensor has failed
 
Camshaft position sensors have failed
 
Ignition coil is faulty
 
Spark plugs are not working properly or are not gapped properly
 

Trouble Code: P0302



Cylinder Number 2 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or ECM system
 
Base engine mechanical problem
 
Fuel delivery component problem (i.e., a contaminated, dirty or sticking fuel injector)
 
Fuel pump relay defective
 
Ignition coil fuses have failed
 
Ignition system problem (dirty damaged coil or plug)
 
Engine speed (RPM) sensor has failed
 
Camshaft position sensors have failed
 
Ignition coil is faulty
 
Spark plugs are not working properly or are not gapped properly
 

Trouble Code: P0303



Cylinder Number 3 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or ECM system
 
Base engine mechanical problem
 
Fuel delivery component problem (i.e., a contaminated, dirty or sticking fuel injector)
 
Fuel pump relay defective
 
Ignition coil fuses have failed
 
Ignition system problem (dirty damaged coil or plug)
 
Engine speed (RPM) sensor has failed
 
Camshaft position sensors have failed
 
Ignition coil is faulty
 
Spark plugs are not working properly or are not gapped properly
 

Trouble Code: P0304



Cylinder Number 4 Misfire Detected

Possible Causes:



Air leak in the intake manifold, or in the EGR or ECM system
 
Base engine mechanical problem
 
Fuel delivery component problem (i.e., a contaminated, dirty or sticking fuel injector)
 
Fuel pump relay defective
 
Ignition coil fuses have failed
 
Ignition system problem (dirty damaged coil or plug)
 
Engine speed (RPM) sensor has failed
 
Camshaft position sensors have failed
 
Ignition coil is faulty
 
Spark plugs are not working properly or are not gapped properly
 

Trouble Code: P0318



Rough Road Sensor

Possible Causes:



Wire connection between Engine Control Module (ECM) and ABS Control Module
 

Trouble Code: P0321



Ignition/Distributor Engine Speed Input Circuit Range/Performance

Possible Causes:



Engine speed sensor has failed or is damaged
 
ECM has failed
 
Sensor wheel is damaged or doesn-t fit properly
 
Sensor wheel spacer isn-t seated properly
 

Trouble Code: P0322



Ignition/Distributor Engine Input Circuit No Signal

Possible Causes:



Engine speed sensor has failed or is damaged
 
ECM has failed
 
Sensor wheel is damaged or doesn-t fit properly
 
Sensor wheel spacer isn-t seated properly
 

 
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