Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2002GOLF GLS, 2.0 K, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 99 (2.0L - GENERIC SCAN TOOL, ENGINE CODE(S): AEG (A4 PLATFORM))ST - GENERIC SCAN TOOLDIAGNOSTIC TROUBLE CODE (DTC) TABLESSAE P1XXXDTCS
2002 Volkswagen Golf GLS, 2.0 K, Standard
SAE P1xxxDTCs
2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION SAE P1xxxDTCs
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 Volkswagen Jetta, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, 2000 Volkswagen GTI, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Fuel and Air ratios, control module
| DTC | Error Message | Diagnostic Procedure | Malfunction Criteria and Threshold Value | Secondary Parameters with Enable Conditions | Monitoring Time Length | Frequency of checks, MIL Illumination |
| P1127 | Mixture adaption (mult.) system too rich (Bank 1) |
|
System too rich -23% System too lean>+23% Within adaptive range | Lambda control Closed loop Intake temp. - 150.35 ° F Engine load - >2 ms Air mass 25 kg/h | 19 Sec |
|
| P1128 | Mixture adaption (mult.) system too lean (Bank 1) |
|
System too rich -23% System too lean>+23% Within adaptive range | Lambda control Closed loop Intake temp. - 150.35 ° F Engine load - >2 ms Air mass 25 kg/h | 19 Sec |
|
| P1176 | Lambda correction downstream of catalyst control limit reached (Bank 1) |
|
Comparison of TV value with threshold value TV1.2 sec. TV>-1.2 sec. | Catalyst temp. - >66 ° F 2nd control loop - Closed | 35 Sec |
|
| P1213 | Cylinder 1 Injector Circuit High |
|
Short to battery + Signal high before injection valves switched on | --- | 0.5 Sec |
|
| P1214 | Cylinder 2 Injector Circuit High |
|
Short to battery + Signal high before injection valves switched on | --- | 0.5 Sec |
|
| P1215 | Cylinder 3 Injector Circuit High |
|
Short to battery + Signal high before injection valves switched on | --- | 0.5 Sec |
|
| P1216 | Cylinder 4 Injector Circuit High |
|
Short to battery + Signal high before injection valves switched on | --- | 0.5 Sec |
|
| P1225 | Cylinder 1 Injector Circuit Low |
|
Short to ground. Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1226 | Cylinder 2 Injector Circuit Low |
|
Short to ground. Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1227 | Cylinder 3 Injector Circuit Low |
|
Short to ground. Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1228 | Cylinder 4 Injector Circuit Low |
|
Short to ground. Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1237 | Cylinder 1 injector open circuit |
|
Open circuit Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1238 | Cylinder 2 injector open circuit |
|
Open circuit Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1239 | Cylinder 3 injector open circuit |
|
Open circuit Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1240 | Cylinder 4 injector open circuit |
|
Open circuit Signal low while injection valves switched on | --- | 0.5 Sec |
|
| P1255 | Engine Coolant Temperature (ECT) Sensor -G62-Short to Ground |
|
Short to Ground > 268.3 ° F | --- | 0.5 Sec |
|
| P1256 | Engine Coolant Temperature (ECT) Sensor -G62- Open circuit/short to B+ |
|
Short to Battery + 47.7 ° F | --- | 0.5 Sec |
|
| P1296 | Malfunction in cooling system |
|
Stuck on sensor No change on signal after start | Engine start temperature | 180 Sec. Closed loop will be enforced -7 ° C: 300 Sec. 10 ° C:120 Sec. |
|
| P1300 | Misfire Detected Low Fuel |
|
Any misfire under low fuel conditions | Fuel level 15% of fuel capacity | --- |
|
| P1410 | Evaporative Emission (EVAP) Canister Purge Regulator Valve Short to B+ |
|
Short to battery+ Signal high | --- | 20 Sec |
|
| P1425 | Evaporative Emission (EVAP) Canister Purge Regulator Valve Short to Ground |
|
Short to ground. Signal low | --- | 20 Sec |
|
| P1426 | Evaporative Emission System Pure Control Valve Circuit Open |
|
Open circuit No activity/No signal | --- | 20 Sec |
|
| P1471 | EVAP Emission Control LPD Circuit Short to B+ |
|
Short to battery +. Signal always high | --- | 0.2 Sec. Once/DCY |
|
| P1472 | EVAP Emission Control LPD Circuit Short to Ground |
|
Short to ground. No signal after start | --- | 0.2 Sec. Once/DCY |
|
| P1473 | Leak diagnosis pump - tank breather system open circuit |
|
Open circuit. No activity/No signal | --- | 0.2 Sec. Once/DCY |
|
| P1475 | Leak diagnosis pump - tank breather system malfunction/no signal |
|
No signal, signal always low | EVAP purge check done or followed by EVAP purge check | 0.5 Sec Once/DCY |
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| P1476 | Leak diagnosis pump - tank breather system malfunction/vacuum to low |
|
Contact unable to open Signal high> 0.5 sec. | EVAP purge check done or followed by EVAP purge check | 0.5 Sec Once/DCY |
|
| P1500 | Fuel Pump Primary Circuit Fault in electrical circuit |
|
No signal | --- | 0.5 Sec |
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| P1502 | Fuel Pump (FP) Relay Short circuit to B+ |
|
High signal | --- | 0.5 Sec |
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| P1543 | Angle sender 1 for throttle valve drive -G187 signal too low |
|
Signal low 0.157 V | --- | 5 Sec |
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| P1544 | Angle sender 1 for throttle valve drive -G187 signal too high |
|
Signal high >4.86 V | --- | 5 Sec |
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| P1558 | Throttle valve drive G186 electrical fault in circuit |
|
Open circuit or no activity | --- | 5 Sec |
|
| P1565 | Throttle valve control 338 lower stop not reached |
|
Signal low 4.157 V | Initialize of potentiometer adaptation After ignition on, if adaptation has not been completed | 10 Sec |
|
| P1580 | Throttle valve drive - bank 1 malfunction |
|
Comparison with throttle movement | --- | 5 Sec |
|
| P1582 | Idling speed regulation adaption limit reached |
|
Signal low >4.571 V Signal high 4.037 V Potentiometer used in reversed logic (adaptive values) | --- | 5 Sec |
|
| P1612 | Engine control unit incorrect coding |
|
If ECM is coded to manual transmission and TCM is available->ECM is wrong coded | After engine has been started | 0.5 Sec |
|
| P1626 | Data-bus drive train missing message from transmission control module |
|
Initialize failure and/or no acknowledge | After engine has been started | 0.5 Sec |
|
| P1681 | Control unit programming not finished |
|
Reprogramming bit not set | --- | 0.5 Sec |
|
01M TRANSMISSION
| DTC | Error Message | Diagnostic Procedure | Malfunction Criteria and Threshold Value | Secondary Parameters with Enable Conditions | Monitoring Time Length | Frequency of checks, MIL Illumination |
| P1778 | Valve 7 electrical fault in circuit |
|
Comparison of stored value with active level Switch off and U 2.1 V; Switch on and U>1.6 V | --- | 0.3 Sec | 2 DCY |
| P1780 | Torque withdrawal faulty |
|
Torque reduction not possible yes/no | Torque reduction requested by TCM | 1 Sec | 2 DCY |
| P1850 | Data-bus drive train missing message from engine control module |
|
No signal within 300 ms | CAN bus ok 500 ms after ign. on | 300 ms | 2 DCY |
| P1854 | Data-Bus driving gear Hardware faulty |
|
Initialize failure and/or no acknowledge 2 attempts of initialize | 500 ms after ign. on | 300 ms | 2 DCY |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.