Volkswagen Cars 2000-05

2.0L L4 VIN E Auto 10

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Trouble Code: P2096



Post Catalyst Fuel Trim System Too Lean (Bank 1)

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
 
Check circuits for shorts to each other, ground or power
 
ECM has failed
 

Trouble Code: P2097



Post Catalyst Fuel Trim System Too Rich (Bank 1)

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
 
Check circuits for shorts to each other, ground or power
 
ECM has failed
 

Trouble Code: P2101



Throttle Actuator Control Motor Range/Performance

Possible Causes:



TACM wiring harness connector is damaged or open
 
TACM wiring may be crossed in the wire harness assembly
 
TACM (motor) circuit is open, or TACM assembly is damaged (possible open circuit)
 
TACM or the Throttle Valve is dirty
 
Throttle Position sensor has failed
 
ECM has failed
 

Trouble Code: P2106



Throttle Actuator Control System - Forced Limited Power Conditions

Possible Causes:



TACM wiring harness connector is damaged or open
 
TACM wiring may be crossed in the wire harness assembly
 
TACM (motor) circuit is open, or TACM assembly is damaged (possible open circuit)
 
TACM or the Throttle Valve is dirty
 
Throttle Position sensor has failed
 
ECM has failed
 

Trouble Code: P2122



Accelerator Pedal Position Sensor -D- Circuit Low Input

Possible Causes:



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

Trouble Code: P2123



Accelerator Pedal Position Sensor -D- Circuit High Input

Possible Causes:



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

Trouble Code: P2127



Accelerator Pedal Position Sensor -E- Circuit Low Input

Possible Causes:



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

Trouble Code: P2128



Accelerator Pedal Position Sensor -E- Circuit High Input

Possible Causes:



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

Trouble Code: P2138



Throttle Position Sensor D/E Voltage Correlation

Possible Causes:



ETC TP sensor connector is damaged or shorted
 
ETC TP sensor circuits shorted together in the wire harness
 
ETC TP sensor signal circuit is shorted to VREF (5v)
 
ETC TP sensor is damaged or the ECM has failed
 

Trouble Code: P2181



Cooling System Performance Malfunction

Possible Causes:



ECT sensor has failed
 
ECT Sensor (on Radiator) has failed
 
ECT sensor signal circuit is open (inspect wiring & connector)
 
ECT sensor signal circuit is shorted
 
Cooling system malfunction, or the thermostat is stuck
 
Engine not operating at normal operating temperature
 
EOT sensor is damaged or it has failed
 

Trouble Code: P2184



Engine Coolant Temperature Sensor 2 Circuit Low

Possible Causes:



ECT sensor has failed
 
ECT Sensor (on Radiator) has failed
 
ECT sensor signal circuit is open (inspect wiring & connector)
 
ECT sensor signal circuit is shorted
 
Cooling system malfunction, or the thermostat is stuck
 
Engine not operating at normal operating temperature
 
EOT sensor is damaged or it has failed
 

Trouble Code: P2185



Engine Coolant Temperature Sensor 2 Circuit High

Possible Causes:



ECT sensor has failed
 
ECT Sensor (on Radiator) has failed
 
ECT sensor signal circuit is open (inspect wiring & connector)
 
ECT sensor signal circuit is shorted
 
Cooling system malfunction, or the thermostat is stuck
 
Engine not operating at normal operating temperature
 
EOT sensor is damaged or it has failed
 

Trouble Code: P2187



System Too Lean On Idle Bank 1

Possible Causes:



Evaporative Emission (EVAP) canister purge regulator valve is faulty
 
Exhaust system components are damaged
 
Fuel injectors are faulty
 
Fuel pressure regulator and residual pressure have failed
 
Fuel Pump (FP) in fuel tank is faulty
 
Intake system has leaks (false air)
 
Secondary Air Injection (AIR) system has an improper seal
 
Intake Manifold Runner Position Sensor has failed
 
Motor for intake flap is faulty
 
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
 
Check circuits for shorts to each other, ground or power
 
ECM has failed
 

Trouble Code: P2188



System Too Rich On Idle Bank 1

Possible Causes:



Evaporative Emission (EVAP) canister purge regulator valve is faulty
 
Exhaust system components are damaged
 
Fuel injectors are faulty
 
Fuel pressure regulator and residual pressure have failed
 
Fuel Pump (FP) in fuel tank is faulty
 
Intake system has leaks (false air)
 
Secondary Air Injection (AIR) system has an improper seal
 
Intake Manifold Runner Position Sensor has failed
 
Motor for intake flap is faulty
 
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
 
Check circuits for shorts to each other, ground or power
 
ECM has failed
 

Trouble Code: P2191



System Too Lean at Higher Load Bank 1

Possible Causes:



Evaporative Emission (EVAP) canister purge regulator valve is faulty
 
Exhaust system components are damaged
 
Fuel injectors are faulty
 
Fuel pressure regulator and residual pressure have failed
 
Fuel Pump (FP) in fuel tank is faulty
 
Intake system has leaks (false air)
 
Secondary Air Injection (AIR) system has an improper seal
 
Intake Manifold Runner Position Sensor has failed
 
Motor for intake flap is faulty
 
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
 
Check circuits for shorts to each other, ground or power
 
ECM has failed
 

Trouble Code: P2192



System Too Rich at Higher Load Bank 1

Possible Causes:



Evaporative Emission (EVAP) canister purge regulator valve is faulty
 
Exhaust system components are damaged
 
Fuel injectors are faulty
 
Fuel pressure regulator and residual pressure have failed
 
Fuel Pump (FP) in fuel tank is faulty
 
Intake system has leaks (false air)
 
Secondary Air Injection (AIR) system has an improper seal
 
Intake Manifold Runner Position Sensor has failed
 
Motor for intake flap is faulty
 
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
 
Check circuits for shorts to each other, ground or power
 
ECM has failed
 

Trouble Code: P2195



O2 Sensor Signal Stuck Lean Bank 1 Sensor 1

Possible Causes:



Engine oil level high
 
Camshaft timing error
 
Cylinder compression low
 
Exhaust leaks in front of O2S
 
EGR valve is stuck open
 
EGR gasket is leaking
 
EVR diaphragm is leaking
 
Damaged fuel pressure regulator or extremely low fuel pressure
 
O2S circuit is open or shorted in the wiring harness
 
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
 
Air leaks after the MAF sensor
 
PCV system leaks
 
Dip stick not seated properly
 

Trouble Code: P2196



O2 Sensor Signal Stuck Rich Bank 1 Sensor 1

Possible Causes:



Engine oil level high
 
Camshaft timing error
 
Cylinder compression low
 
Exhaust leaks in front of O2S
 
EGR valve is stuck open
 
EGR gasket is leaking
 
EVR diaphragm is leaking
 
Damaged fuel pressure regulator or extremely low fuel pressure
 
O2S circuit is open or shorted in the wiring harness
 
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
 
Air leaks after the MAF sensor
 
PCV system leaks
 
Dip stick not seated properly
 

Trouble Code: P2231



O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 1

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2237



O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2240



O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2243



O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2251



O2 Sensor Negative Voltage Circuit/Open Bank 1 Sensor 1

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2257



Secondary Air Injection System Control -A- Circuit Low

Possible Causes:



AIR solenoid power circuit (B+) is open (check dedicated fuse)
 
AIR bypass solenoid control circuit is open or shorted to ground
 
AIR diverter solenoid control circuit open or shorted to ground
 
AIR pump control circuit is open or shorted to ground
 
Check valve (one or more) is damaged or leaking
 
Solid State relay is damaged or it has failed
 
Check activation of Secondary Air Injection (AIR) Pump Relay
 
ECM has failed
 

Trouble Code: P2258



Secondary Air Injection System Control -A- Circuit High

Possible Causes:



AIR solenoid power circuit (B+) is open (check dedicated fuse)
 
AIR bypass solenoid control circuit is open or shorted to ground
 
AIR diverter solenoid control circuit open or shorted to ground
 
AIR pump control circuit is open or shorted to ground
 
Check valve (one or more) is damaged or leaking
 
Solid State relay is damaged or it has failed
 
Check activation of Secondary Air Injection (AIR) Pump Relay
 
ECM has failed
 

Trouble Code: P2270



O2 Sensor Signal Stuck Lean Bank 1 Sensor 2

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2271



O2 Sensor Signal Stuck Rich Bank 1 Sensor 2

Possible Causes:



Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 
ECM has failed
 

Trouble Code: P2279



Intake Air System Leak

Possible Causes:



Intake Manifold Runner Position Sensor is damaged or has failed
 
Intake system has leaks (false air)
 
Motor for intake flap is faulty
 
ECM has failed
 
IAT sensor signal circuit is shorted to sensor or chassis ground
 
IAT sensor is damaged or has failed
 
ECM has failed.
 

Trouble Code: P2336



Cylinder #1 Above Knock Threshold

Possible Causes:



Contact surfaces between knock sensor and cylinder block are dirty
 
Knock Sensors not tightened to be exactly 20 Nm.
 
Knock sensor(s) have failed
 
Engine Control Module (ECM) is not connected or has failed
 
There is a fuel contamination
 
Engine equipment is lose or broken
 

Trouble Code: P2337



Cylinder #2 Above Knock Threshold

Possible Causes:



Contact surfaces between knock sensor and cylinder block are dirty
 
Knock Sensors not tightened to be exactly 20 Nm.
 
Knock sensor(s) have failed
 
Engine Control Module (ECM) is not connected or has failed
 
There is a fuel contamination
 
Engine equipment is lose or broken
 

Trouble Code: P2338



Cylinder #3 Above Knock Threshold

Possible Causes:



Contact surfaces between knock sensor and cylinder block are dirty
 
Knock Sensors not tightened to be exactly 20 Nm.
 
Knock sensor(s) have failed
 
Engine Control Module (ECM) is not connected or has failed
 
There is a fuel contamination
 
Engine equipment is lose or broken
 

Trouble Code: P2339



Cylinder #4 Above Knock Threshold

Possible Causes:



Contact surfaces between knock sensor and cylinder block are dirty
 
Knock Sensors not tightened to be exactly 20 Nm.
 
Knock sensor(s) have failed
 
Engine Control Module (ECM) is not connected or has failed
 
There is a fuel contamination
 
Engine equipment is lose or broken
 

Trouble Code: P2400



EVAP Leak Detection Pump (LDP) Control Circuit Open

Possible Causes:



EVAP LDP power supply circuit is open
 
EVAP LDP solenoid valve is damaged or it has failed
 
EVAP LDP canister has a leak or a poor seal
 
ECM has failed
 
EVAP canister system has an improper seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 has failed
 
Leak Detection Pump (LDP) is faulty
 
Aftermarket EVAP parts that do not conform to specifications
 
EVAP component seals leaking (i.e., leaks in the Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve).
 

Trouble Code: P2401



EVAP Leak Detection Pump Control Circuit Low

Possible Causes:



EVAP LDP power supply circuit is open
 
EVAP LDP solenoid valve is damaged or it has failed
 
EVAP LDP canister has a leak or a poor seal
 
ECM has failed
 
EVAP canister system has an improper seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 has failed
 
Leak Detection Pump (LDP) is faulty
 
Aftermarket EVAP parts that do not conform to specifications
 
EVAP component seals leaking (i.e., leaks in the Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve).
 

Trouble Code: P2402



EVAP Leak Detection Pump Control Circuit High

Possible Causes:



EVAP LDP power supply circuit is open
 
EVAP LDP solenoid valve is damaged or it has failed
 
EVAP LDP canister has a leak or a poor seal
 
ECM has failed
 
EVAP canister system has an improper seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 has failed
 
Leak Detection Pump (LDP) is faulty
 
Aftermarket EVAP parts that do not conform to specifications
 
EVAP component seals leaking (i.e., leaks in the Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve).
 

Trouble Code: P2403



EVAP Leak Detection Pump Sense Circuit Open

Possible Causes:



EVAP LDP power supply circuit is open
 
EVAP LDP solenoid valve is damaged or it has failed
 
EVAP LDP canister has a leak or a poor seal
 
ECM has failed
 
EVAP canister system has an improper seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 has failed
 
Leak Detection Pump (LDP) is faulty
 
Aftermarket EVAP parts that do not conform to specifications
 
EVAP component seals leaking (i.e., leaks in the Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve).
 

Trouble Code: P2404



EVAP Leak Detection Pump Sense Circuit Range/Performance

Possible Causes:



EVAP LDP power supply circuit is open
 
EVAP LDP solenoid valve is damaged or it has failed
 
EVAP LDP canister has a leak or a poor seal
 
ECM has failed
 
EVAP canister system has an improper seal
 
Evaporative Emission (EVAP) canister purge regulator valve 1 has failed
 
Leak Detection Pump (LDP) is faulty
 
Aftermarket EVAP parts that do not conform to specifications
 
EVAP component seals leaking (i.e., leaks in the Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve).
 

Trouble Code: P2414



O2 Sensor Exhaust Sample Error Bank 1 Sensor 1

Possible Causes:



Intake Manifold Runner Position Sensor is damaged or has failed
 
Intake system has leaks (false air)
 
Motor for intake flap is faulty
 
ECM has failed
 
Oxygen sensor (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (before catalytic converter) is faulty
 
Oxygen sensor heater (behind catalytic converter) is faulty
 
O2S circuit is open or shorted in the wiring harness
 

Trouble Code: P2600



Coolant Pump Control Circuit/Open

Possible Causes:



Check activation of Recirculation Pump Relay
 
Recirculation pump has failed
 
Coolant Temperature Sensor has failed
 
Circuit short to ground, open or other component
 
ECM has failed
 

Trouble Code: P2602



Coolant Pump Control Circuit Low

Possible Causes:



Check activation of Recirculation Pump Relay
 
Recirculation pump has failed
 
Coolant Temperature Sensor has failed
 
Circuit short to ground, open or other component
 
ECM has failed
 

 
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