Volkswagen Cars 2000-05

1.8L L4 - Std 4

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Trouble Code: P0510



Closed Throttle Position Switch Malfunction

Possible Causes:



Throttle Valve Control module has failed
 
Throttle Valve Control module is shorted to ground
 
Throttle Valve Control module is open
 
ECM has failed
 

Trouble Code: P0560



System Voltage Malfunction

Possible Causes:



Alternator damaged or faulty
 
Battery voltage low or insufficient
 
Fuses blown or circuits open
 
Battery connection to terminal not clean
 
Voltage regulator has failed
 

Trouble Code: P0562



System Voltage Low

Possible Causes:



Alternator damaged or faulty
 
Battery voltage low or insufficient
 
Fuses blown or circuits open
 
Battery connection to terminal not clean
 
Voltage regulator has failed
 

Trouble Code: P0563



System Voltage High

Possible Causes:



Alternator damaged or faulty
 
Battery voltage low or insufficient
 
Fuses blown or circuits open
 
Battery connection to terminal not clean
 
Voltage regulator has failed
 

Trouble Code: P0568



Cruise Control Set Signal Incorrect Signal

Possible Causes:



Cruise control system is damaged
 
Control circuit is shorted to chassis ground
 

Trouble Code: P0571



Cruise/Brake Switch (A) Circuit Malfunction

Possible Causes:



Brake light switch is faulty
 
Control circuit is shorted to chassis ground
 

Trouble Code: P0600



Serial Communication Link (Data BUS) Message Missing

Possible Causes:



ECM has failed
 
CAN data bus wires have short circuited to each other
 

Trouble Code: P0601



Internal Control Module Memory Check Sum Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
Connection to the 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: P0602



Control Module Programming Error

Possible Causes:



During the VID reprogramming function, the Vehicle ID (VID) data block failed during reprogramming wit the Scan Tool.
 
Battery terminal corrosion, or loose battery connection
 
Connection to the 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: 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: P0604



Internal Control Module Random Access Memory (RAM) Error

Possible Causes:



Battery terminal corrosion, or loose battery connection
 
Connection to the 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: P0605



ECM Read Only Memory (ROM) Test Error

Possible Causes:



An attempt was made to change the module calibration, or a module programming error may have occurred
 
Clear the trouble codes and then check for this trouble code. If it resets, the ECM has failed and needs replacement.
 
Aftermarket performance products may have been installed.
 
The Transmission Control Module (TCM) has failed.
 

Trouble Code: P0606



ECM Internal Communication Error

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: P0613



TCM Processor

Possible Causes:



TCM failed
 
ECM failed
 
Replacement control module ID doesn-t match old control module ID
 

Trouble Code: P0614



ECM / TCM Incompatible

Possible Causes:



TCM failed
 
ECM failed
 
Circuit shorting between ECM and TCM
 
Replacement control module ID doesn-t match old control module ID
 

Trouble Code: P0627



Fuel Pump "A" Control Circuit Open

Possible Causes:



Fuel Pressure Regulator Valve is faulty
 
Fuel Pressure Sensor is faulty
 
Fuel Pump (FP) Control Module is faulty
 
Fuel pump is faulty
 

Trouble Code: P0628



Fuel Pump "A" Control Circuit Low

Possible Causes:



Fuel Pressure Regulator Valve is faulty
 
Fuel Pressure Sensor is faulty
 
Fuel Pump (FP) Control Module is faulty
 
Fuel pump is faulty
 

Trouble Code: P0629



Fuel Pump "A" Control Circuit High

Possible Causes:



Fuel Pressure Regulator Valve is faulty
 
Fuel Pressure Sensor is faulty
 
Fuel Pump (FP) Control Module is faulty
 
Fuel pump is faulty
 

Trouble Code: P0638



Throttle Actuator Control Range/Performance Bank 1

Possible Causes:



Throttle Position (TP) sensor is faulty
 
Throttle valve control module is faulty
 
ECM is faulty
 
Circuit wires have short circuited to each other, to vehicle Ground (GND) or to B+.
 
Accelerator pedal module is faulty
 

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: P0650



Malfunction Indicator Lamp (MIL) Control Circuit

Possible Causes:



Wire from ECM to MIL is shorted or grounded
 
ECM has failed
 
MIL has failed
 

Trouble Code: P0685



ECM Power Relay Control Circuit Open

Possible Causes:



Generator has failed or is damaged
 
Fuel pump relay is faulty
 
Circuit is grounded to power or chassis
 
ECM has failed
 

Trouble Code: P0686



ECM/PCM Power Relay Control Circuit Low

Possible Causes:



Generator has failed or is damaged
 
Fuel pump relay is faulty
 
Circuit is grounded to power or chassis
 
ECM has failed
 

Trouble Code: P0687



ECM/PCM Power Relay Control Circuit High

Possible Causes:



Generator has failed or is damaged
 
Fuel pump relay is faulty
 
Circuit is grounded to power or chassis
 
ECM has failed
 

Trouble Code: P0688



ECM/PCM Power Relay Control Sense Circuit Open

Possible Causes:



Generator has failed or is damaged
 
Fuel pump relay is faulty
 
Circuit is grounded to power or chassis
 
ECM has failed
 

Trouble Code: P0700



Transmission Control System Malfunction

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 Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 
Engine Control Module (ECM) is faulty
 
Voltage supply for Engine Control Module (ECM) is faulty
 
Transmission Control Module (TCM) is faulty
 

Trouble Code: P0702



Transmission Control System Electrical

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 Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 
Engine Control Module (ECM) is faulty
 
Voltage supply for Engine Control Module (ECM) is faulty
 
Transmission Control Module (TCM) is faulty
 

Trouble Code: P0704



Clutch Switch Input Circuit Malfunction

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 Input Speed (RPM) Sensor has failed
 
Transmission Output Speed (RPM) Sensor has failed
 
Engine Control Module (ECM) is faulty
 
Voltage supply for Engine Control Module (ECM) is faulty
 
Transmission Control Module (TCM) is faulty
 

Trouble Code: P0771



A/T Shift Solenoid E Performance

Possible Causes:



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

Trouble Code: P1114



O2 Control (Bank 1 Sensor 2) Internal Resistance Too High

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
Leaks present in the exhaust manifold or exhaust pipes
 
HO2S signal wire and ground wire crossed in connector
 
HO2S element is fuel contaminated or has failed
 
ECM has failed
 

Trouble Code: P1115



O2 Control (Bank 1 Sensor 1) Short to Ground

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
Leaks present in the exhaust manifold or exhaust pipes
 
HO2S signal wire and ground wire crossed in connector
 
HO2S element is fuel contaminated or has failed
 
ECM has failed
 

Trouble Code: P1116



O2 Control (Bank 1 Sensor 1) Open

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
Leaks present in the exhaust manifold or exhaust pipes
 
HO2S signal wire and ground wire crossed in connector
 
HO2S element is fuel contaminated or has failed
 
ECM has failed
 

Trouble Code: P1117



O2 Control (Bank 1 Sensor 2) Open

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
Leaks present in the exhaust manifold or exhaust pipes
 
HO2S signal wire and ground wire crossed in connector
 
HO2S element is fuel contaminated or has failed
 
ECM has failed
 

Trouble Code: P1118



O2 Sensor Heater Circ. (Bank 1-Sensor2) Open

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor (behind catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
Circuit wiring has a short to power or ground
 
Engine Component Power Supply Relay is faulty
 
E-box fuses for oxygen sensor are faulty
 
Leaks present in the exhaust manifold or exhaust pipes
 
HO2S signal wire and ground wire crossed in connector
 
HO2S element is fuel contaminated or has failed
 
ECM has failed
 

Trouble Code: P1127



Long Term Fuel Trim Add. Air. Bank 1 System Too Rich

Possible Causes:



MAF sensor circuit open
 
MAF sensor circuit shorted to ground
 
Air leak in the manifold
 
Secondary air injection system combi-valve stuck open
 
Secondary air injection system electrical short
 
Fuel pressure too high, leaks in the vacuum hose to fuel pressure regulator
 
Fuel pressure regulator has failed
 
Fuel injectors are dirty, faulty or do not close properly
 
ECM has failed
 

Trouble Code: P1128



Long Term Fuel Trim Add. Air. Bank 1 System Too Lean

Possible Causes:



Fuel pressure is too low or fuel quantity supplied is too low
 
Fuel filter faulty
 
Transfer fuel pump has failed
 
Fuel injector is faulty (sticking or not opening)
 
Engine speed (RPM) sensor is faulty
 
MAF sensor circuit open
 
MAF sensor circuit shorted to ground
 
Air leak in the manifold
 
Secondary air injection system combi-valve stuck open
 
Secondary air injection system electrical short
 
ECM has failed
 

Trouble Code: P1136



Long Term Fuel Trim Add. Fuel, Bank 1 System Too Lean

Possible Causes:



Air intake system leaking, vacuum hoses leaking or damaged
 
Air leaks located after the MAF sensor mounting location
 
EGR valve sticking, EGR diaphragm leaking, or gasket leaking
 
EVAP vapor recovery system has failed
 
Excessive fuel pressure, leaking or contaminated fuel injectors
 
Exhaust leaks before or near the HO2S(s) mounting location
 
Fuel pressure regulator is leaking or damaged
 
HO2S circuits wet or oily, corroded, or poor terminal contact
 
HO2S is damaged or it has failed
 
HO2S signal circuit open, shorted to ground, shorted to power
 
Low fuel pressure or vehicle driven until it was out of fuel
 
Oil dipstick not seated or engine oil level too high (overfilled)
 

Trouble Code: P1137



Long Term Fuel Trim Add. Fuel, Bank 1 System Too Rich

Possible Causes:



Air intake system leaking, vacuum hoses leaking or damaged
 
Air leaks located after the MAF sensor mounting location
 
EGR valve sticking, EGR diaphragm leaking, or gasket leaking
 
EVAP vapor recovery system has failed
 
Excessive fuel pressure, leaking or contaminated fuel injectors
 
Exhaust leaks before or near the HO2S(s) mounting location
 
Fuel pressure regulator is leaking or damaged
 
HO2S circuits wet or oily, corroded, or poor terminal contact
 
HO2S is damaged or it has failed
 
HO2S signal circuit open, shorted to ground, shorted to power
 
Low fuel pressure or vehicle driven until it was out of fuel
 
Oil dipstick not seated or engine oil level too high (overfilled)
 

Trouble Code: P1141



Load Calculation Cross Check Range/Performance

Possible Causes:



Intake system is leaking
 
Signal is grounding
 
ECM has failed
 
Intake Manifold Runner Position Sensor is faulty
 
Intake system for leaks (false air) is faulty
 
Motor for intake flap is faulty
 
Mass Air Flow (MAF) sensor is faulty
 
Throttle Position (TP) sensor is faulty
 
Throttle valve control module is faulty
 

Trouble Code: P1142



Load Calculation Cross Check Lower Limit

Possible Causes:



Intake Manifold Runner Position Sensor is faulty
 
Intake system for leaks (false air) is faulty
 
Motor for intake flap is faulty
 
Mass Air Flow (MAF) sensor is faulty
 
Throttle Position (TP) sensor is faulty
 
Throttle valve control module is faulty
 
Intake system is leaking
 
Signal is grounding
 
ECM has failed
 

 
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