Volkswagen Cars 2000-05

2.0L L4 VIN B Std 7

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Trouble Code: P1477



EVAP Emission Control LDP Circuit Malfunction

Possible Causes:



Leak Detection Pump has failed
 
EVAP canister system has an improper or broken seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
 
Hoses between the fuel pump and the EVAP canister are faulty
 
Fuel filler cap is loose
 
Fuel pump seal is defective, faulty or otherwise leaking
 
Hoses between the EVAP canister and the fuel flap unit are faulty
 
Hoses between the EVAP canister and the evaporative emission canister purge regulator valve are faulty
 
ECM has failed
 

Trouble Code: P1478



EVAP Emission Control LDP Circuit Clamped Tube Detected

Possible Causes:



Leak Detection Pump has failed
 
EVAP canister system has an improper or broken seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
 
Hoses between the fuel pump and the EVAP canister are faulty
 
Fuel filler cap is loose
 
Fuel pump seal is defective, faulty or otherwise leaking
 
Hoses between the EVAP canister and the fuel flap unit are faulty
 
Hoses between the EVAP canister and the evaporative emission canister purge regulator valve are faulty
 
ECM has failed
 

Trouble Code: P1500



Fuel Pump Relay Circuit Electrical Malfunction

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 
ECM has failed
 

Trouble Code: P1501



Fuel Pump Relay Circuit Electrical Short to Ground

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 
ECM has failed
 

Trouble Code: P1502



Fuel Pump Relay Circuit Short to B+

Possible Causes:



Fuel delivery unit connector is loose or not attached
 
Fuse 18 cause a short to the transfer fuel pump or the O2S
 
Fuel pump has failed
 
Fuel pump relay circuit is shorted to ground, B+ or is open
 
Fuel Pump (FP) Relay not activated
 
ECM has failed
 

Trouble Code: P1517



Main Relay Circuit Electrical Malfunction

Possible Causes:



Engine Control Module (ECM) has failed
 
Voltage supply for Engine Control Module (ECM) is faulty
 
Check activation of Motronic Engine Control Module (ECM) Power Supply Relay
 

Trouble Code: P1541



Fuel Pump Relay Circuit Open

Possible Causes:



Fuel pump relay not activiated
 

Trouble Code: P1542



Throttle Actuation Potentiometer Range/Performance

Possible Causes:



Throttle valve control module is faulty
 
Throttle valve is damaged or dirty
 
Throttle valve must be in closed throttle position
 
Accelerator pedal is out of adjustment (AEG engines only)
 
Throttle position actuator is shorting to ground or power
 

Trouble Code: P1543



Throttle Actuation Potentiometer Signal Too Low

Possible Causes:



Throttle valve control module is faulty
 
Throttle valve is damaged or dirty
 
Throttle valve must be in closed throttle position
 
Accelerator pedal is out of adjustment (AEG engines only)
 
Throttle position actuator is shorting to ground or power
 

Trouble Code: P1544



Throttle Actuation Potentiometer Signal Too High

Possible Causes:



Throttle valve control module is faulty
 
Throttle valve is damaged or dirty
 
Throttle valve must be in closed throttle position
 
Accelerator pedal is out of adjustment (AEG engines only)
 
Throttle position actuator is shorting to ground or power
 

Trouble Code: P1545



Throttle Position Control Malfunction

Possible Causes:



Throttle valve control module is faulty
 
Throttle valve is damaged or dirty
 
Throttle valve must be in closed throttle position
 
Accelerator pedal is out of adjustment (AEG engines only)
 
Throttle position actuator is shorting to ground or power
 

Trouble Code: P1546



Boost Pressure Control Valve Short to B+

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: P1547



Boost Pressure Control Valve Short to Ground

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: P1548



Boost Pressure Control Valve Open

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: P1555



Charge Pressure Upper Limit Exceeded

Possible Causes:



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

Trouble Code: P1556



Charge Pressure Control Negative Deviation

Possible Causes:



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

Trouble Code: P1557



Charge Pressure Control Positive Deviation

Possible Causes:



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

Trouble Code: P1558



Throttle Actuator Electrical Malfunction

Possible Causes:



Throttle valve control module has failed
 
Throttle valve control module-s circuit has shorted or is open
 
The ECM has failed
 

Trouble Code: P1559



Idle Speed Control Throttle Position Adaptation Malfunction

Possible Causes:



Throttle valve control module has failed
 
Throttle valve control module-s circuit has shorted or is open
 
The ECM has failed
 

Trouble Code: P1560



Maximum Engine Speed Exceeded

Possible Causes:



Throttle valve control module has failed
 
Throttle valve control module-s circuit has shorted or is open
 
The ECM has failed
 
General engine damage
 

Trouble Code: P1564



Idle Speed Control Throttle Position Low Voltage During Adaptation

Possible Causes:



Alternator failed
 
ECM failed
 
Fuses blown or open circuits
 
Clean Throttle Valve Control Module
 
Faulty battery
 
Idle speed control throttle failed
 
Wire connections to relay carrier and ground connection of ECM may have shorted
 

Trouble Code: P1565



Idle Speed Control Throttle Position Lower Limit Not Attainted

Possible Causes:



Alternator failed
 
ECM failed
 
Fuses blown or open circuits
 
Clean Throttle Valve Control Module
 
Accelerator cable not adjusted properly
 
Idle speed control throttle failed
 
Wire connections to relay carrier and ground connection of ECM may have shorted
 

Trouble Code: P1568



Idle Speed Control Throttle Position Mechanical Malfunction

Possible Causes:



Alternator failed
 
ECM failed
 
Fuses blown or open circuits
 
Clean Throttle Valve Control Module
 
Accelerator cable not adjusted properly
 
Idle speed control throttle failed
 
Wire connections to relay carrier and ground connection of ECM may have shorted
 

Trouble Code: P1569



Cruise Control Switch Incorrect Signal

Possible Causes:



Check Cruise Control System (CCS) wiring shorts to ground or B+
 

Trouble Code: P1579



Idle Speed Control Throttle Position Adaptation Not Started

Possible Causes:



Adapt Engine Control Module (ECM) to throttle valve control module.
 

Trouble Code: P1580



Throttle Actuator B1 Malfunction

Possible Causes:



The throttle position actuator B1 circuit is open
 
The ECM has failed
 
The throttle valve control module circuit is open
 
The throttle position actuator has failed
 

Trouble Code: P1582



Idle Adaptation at Limit

Possible Causes:



Crankcase oil is diluted (change the oil)
 
Fuel injectors are worn
 
Compression ratio is low
 
Throttle valve control module is faulty
 
Leak Detection Pump has failed
 
EVAP canister system has an improper or broken seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 is faulty
 
Hoses between the fuel pump and the EVAP canister are faulty
 
Fuel filler cap is loose
 
Fuel pump seal is defective, faulty or otherwise leaking
 
Hoses between the EVAP canister and the fuel flap unit are faulty
 
Hoses between the EVAP canister and the evaporative emission canister purge regulator valve are faulty
 
ECM has failed
 

Trouble Code: P1602



Power Supply (B+) Terminal 15 Low Voltage

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1603



Internal Control Module Malfunction

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1604



Internal Control Module Driver Error

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1606



Rough Road Spec Engine Torque ABS-ECU Electrical Malfunction

Possible Causes:



Check wire connection between Engine Control Module (ECM) and ABS Control Module
 

Trouble Code: P1609



Crash Shut-Down Activated

Possible Causes:



Check the vehicle for damage
 
Reset the ECU
 

Trouble Code: P1610



ECU Defective

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1611



MIL Call-Up Circuit, Transmission Control Module Short to Ground

Possible Causes:



Open/short circuit to ground in the communication wire from the transmission to the ECM.
 
The ECM has failed
 

Trouble Code: P1612



Electronic Control Module Incorrect Coding

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1613



MIL Call-up Circuit Open/Short to B+

Possible Causes:



Open/short circuit to ground from the MIL to the ECM.
 
The ECM has failed
 
The MIL light has failed (check bulb)
 

Trouble Code: P1624



MIL Requested Signature Active

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1626



Data BUS Powertrain Missing Message From Transmission Control

Possible Causes:



(If ECM was replaced) ECM ID not the same as the replaced unit
 
ECM has failed
 
Voltage supply for Engine Control Module (ECM) has shorted
 

Trouble Code: P1630



Acceleration Pedal Position Sensor 1 Signal Too Low

Possible Causes:



Ground between engine and chassis may be broken
 
Throttle position sensor may have failed
 
Accelerator Pedal Position Sensor 2 has failed
 
Throttle position sensor wiring may have shorted
 
Faulty voltage supply
 
ECM has failed
 

Trouble Code: P1631



Acceleration Pedal Position Sensor 1 Signal Too High

Possible Causes:



Ground between engine and chassis may be broken
 
Throttle position sensor may have failed
 
Accelerator Pedal Position Sensor 2 has failed
 
Throttle position sensor wiring may have shorted
 
Faulty voltage supply
 
ECM has failed
 

 
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