VR6This page applies to VR6 Motronic OBD1 systems on engine-swapped Mk2s, Corrados, and early Passats (to 1995).To access the fault system, place an LED test light between the red wire on the black connector and the yellow/black wire on the blue connector under the shift boot. Then turn the ignition on (but don't start the car) and place a jumper between the brown wire on the black connector and the yellow wire on the white connector for at least 5 seconds. Remove the jumper, and the CHECK light on the dashboard should flash one long pulse, then several shorter pulses (with spaces) indicating codes. Please click here for an example. The example picture above would indicate a 1234 code. Connect the jumper again for at least 4 seconds to advance to the next code. When "0000" (2.5s flashes at 2.5s intervals) or "4444" is read, the sequence is completed. To clear the codes, connect the jumper with the ignition off, then turn it on. After 5 seconds, remove the jumper, and "4444" should be read. |
Code | Description | Action |
4444 | No faults recorded | - |
1231 | Speed sender | Faulty speed sender, bad speedometer cable, or bad cluster fuse |
2111 | Engine speed sensor | Sensor malfunctioning, sensor wheel for engine speed sensor malfunctioning or loose, wiring fault |
2113 | Camshaft position sensor | Rotor twisted, Defective sensor or wiring |
2212 | Throttle Position Sensor | Defective potentiometer or wiring |
2312 | Coolant temperature sensor | Defective coolant temperature sensor or wiring |
2142 | Knock sensor I | Defective knock sensor or wiring. Control unit not recognizing knock signal |
2342 | Oxygen sensor system (faulty signal or exceeding adjustment range) | Faulty sensor wiring, faulty sensor, incorrect idle speed, leaking cold start valve, or intake air leaks |
2412 | Intake air temperature sensor | Sensor malfunctioning, wiring fault |
2234 | Supply voltage too high or low | Battery voltage above/below 16/10v |
2231 | Idle speed stabilizer has exceeded adaptive range | Throttle valve adjustment incorrect, incorrect timing, evap system faulty, or intake air leaks |
2141 | Knock sensor I | Engine knock due to incorrect fuel, incorrect timing, or faulty sensor |
2341 | Oxygen sensor control exceeded | Probe defective, intake air leaks, injectors malfunctioning, fuel pressure low/high, hot wire for MAF not burning cleanly, evap system fault |
2144 | Knock sensor II | Faulty sensor wiring, faulty sensor, or faulty control unit |
2214 | Maximum engine speed exceeded | ECU fault causes over-revving, bad shifting, signal from engine speed sensor defective |
2314 | Engine/transmission electrical connection | Shorted to ground |
2324 | Mass airflow sensor | Signal high/low, sensor malfunctioning, short to positive/ground, air leak |
2413 | Mixture adaption limit exceeded | Fuel pressure fault, misfire, air leaks, injectors leaking, hot wire not burning off cleanly, Oxygen sensor regulation faulty, exhaust leak, evap fault |
2411 | EGR system (California only) | Intake air temperature sensor faulty, faulty EGR sensor wiring, faulty or plugged EGR system |
4332 | Output stages in engine control module, mechanical malfunction | Loose terminal to one of the Output DTM components or to the Motronic engine control module |
4343 | EVAP canister purge regulator valve | Malfunction in wiring, short to positive/negative |
4411 | Fuel injector #1 fault | Check fuel injector wiring |
4412 | Fuel injector #2 fault | Check fuel injector wiring |
4413 | Fuel injector #3 fault | Check fuel injector wiring |
4414 | Fuel injector #4 fault | Check fuel injector wiring |
4421 | Fuel injector #5 fault | Check fuel injector wiring |
4422 | Fuel injector #6 fault | Check fuel injector wiring |
4431 | Idle stabilizer valve | Faulty wiring or valve, or control unit |
4433 | Fuel pump relay | Malfunction or wire has short to positive |
4312 | EGR vacuum regulator solenoid valve | EGR valve malfunction, wiring shorted to ground/positive |
1111 | Control unit | Defective control unit |