Volkswagen Cars 2000-05

2.0L L4 VIN E Auto 12

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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: 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: P0231



Fuel Pump Secondary Circuit Low

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: P0232



Fuel Pump Secondary Circuit High

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: P0263



Cylinder 1 Contribution/Balance

Possible Causes:



Check activation of valve for pump/injector
 
ECM has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 

Trouble Code: P0266



Cylinder 2 Contribution/Balance

Possible Causes:



Check activation of valve for pump/injector
 
ECM has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 

Trouble Code: P0269



Cylinder 3 Contribution/Balance

Possible Causes:



Check activation of valve for pump/injector
 
ECM has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 

Trouble Code: P0272



Cylinder 4 Contribution/Balance

Possible Causes:



Check activation of valve for pump/injector
 
ECM has failed
 
Fuel pump relay has failed
 
Fuel injectors may have malfunctioned
 

Trouble Code: P0300



Random 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: P0381



Glow Plug/Heater Indicator Circuit

Possible Causes:



Check activation of Glow Plug Indicator Lamp
 

Trouble Code: P0401



Exhaust Gas Recirculation Malfunction (ESM System)

Possible Causes:



EGR valve hoses are damaged, leaking or restricted
 
EGR vacuum regulator solenoid valve has failed or is dirty
 
EGR valve source hoses loose or connected wrong
 
Potentiometer for the EGR is faulty
 
EGR valve connector is damaged, loose or shorted
 
EGR valve is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0402



EGR Flow At Idle Speed Detected (ESM System)

Possible Causes:



EGR valve hoses are damaged, leaking or restricted
 
EGR vacuum regulator solenoid valve has failed or is dirty
 
EGR valve source hoses loose or connected wrong
 
Potentiometer for the EGR is faulty
 
EGR valve connector is damaged, loose or shorted
 
EGR valve is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0403



EGR Solenoid Circuit Malfunction

Possible Causes:



EGR valve hoses are damaged, leaking or restricted
 
EGR vacuum regulator solenoid valve has failed or is dirty
 
EGR valve source hoses loose or connected wrong
 
Potentiometer for the EGR is faulty
 
EGR valve connector is damaged, loose or shorted
 
EGR valve is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0404



EGR Control Circuit Range/Performance

Possible Causes:



EGR valve hoses are damaged, leaking or restricted
 
EGR vacuum regulator solenoid valve has failed or is dirty
 
EGR valve source hoses loose or connected wrong
 
Potentiometer for the EGR is faulty
 
EGR valve connector is damaged, loose or shorted
 
EGR valve is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0545



Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1

Possible Causes:



Exhust gas temperature sensor is faulty
 
EGT control circuit is shorted to chassis ground
 
ECM has failed
 

Trouble Code: P0546



Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

Possible Causes:



Exhust gas temperature sensor is faulty
 
EGT control circuit is shorted to chassis ground
 
ECM has failed
 

Trouble Code: P0603



ECM Keep Alive Memory Test Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
KAPWR to ECM interrupted, or the circuit has been opened
 
Reprogramming error has occurred
 
ECM has failed and needs replacement. Remember to check for Aftermarket Performance Products before replacing a ECM.
 

Trouble Code: P0607



Control Module Performance

Possible Causes:



Clear the trouble codes and then check for this trouble code. If it resets, the ECM has failed and needs replacement.
 
Remember to check for signs of Aftermarket Performance Products installation before replacing the ECM.
 

Trouble Code: P0642



Sensor Reference Voltage -A- Circuit Low

Possible Causes:



Circuit harness connector contacts are corroded or ingressed of water
 
Circuit wires have shorted to each other, to battery or ground
 
Automatic Transmission Hydraulic Pressure Sensor 1 has failed
 
Solenoid valves in valve body are faulty
 
Transmission Control Module (TCM) needs replacing
 
Transmission Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 

Trouble Code: P0643



Sensor Reference Voltage -A- Circuit High

Possible Causes:



Circuit harness connector contacts are corroded or ingressed of water
 
Circuit wires have shorted to each other, to battery or ground
 
Automatic Transmission Hydraulic Pressure Sensor 1 has failed
 
Solenoid valves in valve body are faulty
 
Transmission Control Module (TCM) needs replacing
 
Transmission Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 

Trouble Code: P0652



Sensor Reference Voltage -B- Circuit Low

Possible Causes:



Circuit harness connector contacts are corroded or ingressed of water
 
Circuit wires have shorted to each other, to battery or ground
 
Automatic Transmission Hydraulic Pressure Sensor 1 has failed
 
Solenoid valves in valve body are faulty
 
Transmission Control Module (TCM) needs replacing
 
Transmission Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 

Trouble Code: P0653



Sensor Reference Voltage -B- Circuit High

Possible Causes:



Circuit harness connector contacts are corroded or ingressed of water
 
Circuit wires have shorted to each other, to battery or ground
 
Automatic Transmission Hydraulic Pressure Sensor 1 has failed
 
Solenoid valves in valve body are faulty
 
Transmission Control Module (TCM) needs replacing
 
Transmission Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 

Trouble Code: P0670



Glow Plug Module Control Circuit

Possible Causes:



Glow plug lamp circuit is open or shorted to ground
 
Glow plug relay control circuit is open or shorted to ground
 
Glow plug relay power circuit is open (test the 12GA fuse link)
 
Glow plug relay is damaged or it has failed
 

Trouble Code: P0671



Cylinder 1 Glow Plug Circuit

Possible Causes:



Glow plug lamp circuit is open or shorted to ground
 
Glow plug relay control circuit is open or shorted to ground
 
Glow plug relay power circuit is open (test the 12GA fuse link)
 
Glow plug relay is damaged or it has failed
 

Trouble Code: P0672



Cylinder 2 Glow Plug Circuit

Possible Causes:



Glow plug lamp circuit is open or shorted to ground
 
Glow plug relay control circuit is open or shorted to ground
 
Glow plug relay power circuit is open (test the 12GA fuse link)
 
Glow plug relay is damaged or it has failed
 

Trouble Code: P0673



Cylinder 3 Glow Plug Circuit

Possible Causes:



Glow plug lamp circuit is open or shorted to ground
 
Glow plug relay control circuit is open or shorted to ground
 
Glow plug relay power circuit is open (test the 12GA fuse link)
 
Glow plug relay is damaged or it has failed
 

Trouble Code: P0674



Cylinder 4 Glow Plug Circuit

Possible Causes:



Glow plug lamp circuit is open or shorted to ground
 
Glow plug relay control circuit is open or shorted to ground
 
Glow plug relay power circuit is open (test the 12GA fuse link)
 
Glow plug relay is damaged or it has failed
 

Trouble Code: P0684



Glow Plug Control Module to PCM Communication Circuit Range/Performance

Possible Causes:



Glow plug lamp circuit is open or shorted to ground
 
Glow plug relay control circuit is open or shorted to ground
 
Glow plug relay power circuit is open (test the 12GA fuse link)
 
Glow plug relay is damaged or it has failed
 

Trouble Code: P0710



TFT Sensor Circuit Malfunction

Possible Causes:



ATF is low, contaminated, dirty or burnt
 
TFT sensor signal circuit has a high resistance condition
 
TFT sensor is out-of-calibration (-skewed-) or it has failed
 
ECM has failed
 

Trouble Code: P0711



Transmission Fluid Temperature Sensor Signal Range/Performance

Possible Causes:



ATF is low, contaminated, dirty or burnt
 
TFT sensor signal circuit has a high resistance condition
 
TFT sensor is out-of-calibration (-skewed-) or it has failed
 
ECM has failed
 

Trouble Code: P0746



Pressure Control Solenoid -A- Performance or Stuck Off

Possible Causes:



ATF level is low
 
Circuit harness connector contacts are corroded or ingressed of water
 
Circuit wires have shorted to each other, to battery or ground
 
Automatic Transmission Hydraulic Pressure Sensor 1 has failed
 
Solenoid valves in valve body are faulty
 
Transmission Control Module (TCM) needs replacing
 
Transmission Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 

Trouble Code: P0747



Pressure Control Solenoid -A- Performance or Stuck On

Possible Causes:



ATF level is low
 
Circuit harness connector contacts are corroded or ingressed of water
 
Circuit wires have shorted to each other, to battery or ground
 
Automatic Transmission Hydraulic Pressure Sensor 1 has failed
 
Solenoid valves in valve body are faulty
 
Transmission Control Module (TCM) needs replacing
 
Transmission Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 

Trouble Code: P0751



Shift Solenoid -A- Performance or Stuck Off

Possible Causes:



Solenoid valves in valve body are faulty
 
Solenoid circuit is shorting to ground
 
Solenoid circuit is open
 
TCM has failed or wiring is shorting
 
ECM has failed
 

Trouble Code: P0752



A/T Shift Solenoid 1/A Function Range/Performance

Possible Causes:



SS1/A solenoid is stuck in the -on- position
 
SS1/A solenoid has a mechanical failure
 
SS1/A solenoid has a hydraulic failure
 
ECM has failed
 

Trouble Code: P0756



A/T Shift Solenoid 2/B Function Range/Performance

Possible Causes:



SS2/B solenoid is stuck in the -on- position
 
SS2/B solenoid has a mechanical failure
 
SS2/B solenoid has a hydraulic failure
 
ECM has failed
 

Trouble Code: P0757



A/T Shift Solenoid 2/B Function Range/Performance

Possible Causes:



SS2/B solenoid is stuck in the -on- position
 
SS2/B solenoid has a mechanical failure
 
SS2/B solenoid has a hydraulic failure
 
ECM has failed
 

Trouble Code: P0776



Pressure Control Solenoid -B- Performance or Stuck Off

Possible Causes:



SS3/C solenoid may be stuck -off-
 
SS3/C solenoid has a mechanical failure
 
SS3/C solenoid has a hydraulic failure
 
ECM has failed
 

Trouble Code: P0777



Pressure Control Solenoid -B- Stuck On

Possible Causes:



SS3/C solenoid may be stuck -on-
 
SS3/C solenoid has a mechanical failure
 
SS3/C solenoid has a hydraulic failure
 
ECM has failed
 

Trouble Code: P0778



Pressure Control Solenoid -B- Electrical

Possible Causes:



Shift Solenoid connector is damaged, open or shorted
 
Shift Solenoid control circuit is open
 
Shift Solenoid control circuit is shorted to ground
 
Shift Solenoid is damaged or it has failed
 
ECM has failed
 

Trouble Code: P0779



Pressure Control Solenoid -B- Intermittent

Possible Causes:



Shift Solenoid connector is damaged, open or shorted
 
Shift Solenoid control circuit is open
 
Shift Solenoid control circuit is shorted to ground
 
Shift Solenoid is damaged or it has failed
 
ECM has failed
 

 
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