All CodesThis list covers all Bosch/VW codes, for all Motronic, Digifant, ABS, and automatic transmission control units with code functionality.To access the fault system, Connect an LED between battery positive (+) and the diagnostic LED wire, then turn the ignition on (but don't start the car) and place a jumper between ground and the respective system's diagnostic connector under the shift boot, for at least 5 seconds (specific wire colors/locations are listed on each fault page). Remove the jumper, and the LED test light 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 | |
0000 | End of output | - | |
1111 | Control unit | Electrical interferences from outside sources, poor ground, malfunctioning control unit | |
1112 | Inlet valve FL | Faulty wiring, connector, or valve coil | |
1113 | Solenoid Valve 1 open or short | Faulty valve (K1 clutch, B1 reverse gear brake), faulty wiring | |
1114 | Inlet valve FR | Faulty wiring, connector, or valve coil | |
1121 | Solenoid Valve 2 open or short | Faulty valve (B2 reverse gear brake), faulty wiring | |
1122 | Inlet valve, rear | Faulty wiring, connector, or valve coil | |
1123 | Solenoid Valve 3 open or short | Faulty valve (K3 clutch), faulty wiring | |
1124 | Transmission | Mechanical/hydraulic dysfunction, malfunctioning clutch or valve body | |
1131 | Solenoid Valve 4 open or short | Faulty valve (K2 clutch), faulty wiring | |
1132 | Outlet valve FL | Faulty wiring, connector, or valve coil | |
1133 | Solenoid Valve 5 open or short | Faulty valve (B1 reverse gear brake), faulty wiring | |
1134 | Outlet valve FR | Faulty wiring, connector, or valve coil | |
1141 | Solenoid Valve 6 open or short | Faulty valve (modulator valve- main pressure in valve body), faulty wiring | |
1142 | Outlet valve, rear | Faulty wiring, connector, or valve coil | |
1143 | Solenoid Valve 7 open or short | Faulty valve (valve body pressure), faulty wiring | |
1222 | Main valve | Faulty wiring, connector, or valve coil | |
1223 | Differential lock valve 1 | Faulty wiring, connector, or valve coil | |
1224 | Differential lock valve 2 | Faulty wiring, connector, or valve coil | |
1231 | Speed sender | Faulty speed sender, bad speedometer cable, or bad cluster fuse | |
1232 | Throttle Potentiometer or Idle Speed Stepper Motor | Faulty Potentiometer or wiring, or faulty idle speed motor or wiring | |
1233 | Wheel-speed sensor FL | Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged | |
1241 | Wheel-speed sensor FR | Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged | |
1243 | Wheel-speed sensor RR | Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged | |
1311 | Wheel-speed sensor RL | Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged | |
1312 | ABS pressure warning switch, brake fluid warning switch | Wiring at switches shorted to positive, excessive pressure or low brake fluid | |
1314 | Transmission range switch | Open in wiring, faulty switch | |
1323 | Kickdown switch | Short circuit, malfunctioning switch | |
1332 | Transmission range program switch | Short circuit, malfunctioning switch | |
1333 | Transmission fluid temperature sensor | Short circuit, malfunctioning sensor | |
2111 | Engine speed sensor | Sensor malfunctioning, sensor wheel for engine speed sensor malfunctioning or loose, wiring fault | |
2112 | Ignition reference sensor (TDC Sensor) or Crank Angle Sensor | Defective sensor or wiring | |
2113 | Camshaft position/hall sensor | Rotor twisted, Defective sensor or wiring | |
2114 | Distributor | Mechanical Fault | |
2121 | Idle switch, Idle Speed Stepper Motor, Ignition Control Valve Circuit | Defective or misadjusted sensor, or faulty wiring | |
2122 | Engine speed signal missing | Open circuit | |
2123 | Full-throttle switch | Defective or misadjusted sensor, or faulty wiring | |
2131 | Brake light switch | Open in wiring, faulty switch | |
2133 | ABS pressure warning switch | Wiring at switch shorted to positive, excessive pressure | |
2141 | Knock sensor I | Engine knock due to incorrect fuel, incorrect timing, or faulty sensor | |
2142 | Knock sensor I, or auto signal missing | Defective knock sensor or wiring. Control unit not recognizing knock signal | |
2143 | Knock sensor II | Defective knock sensor or wiring. Control unit not recognizing knock signal | |
2144 | Knock sensor II | Faulty sensor wiring, faulty sensor, or faulty control unit | |
2212 | Throttle Position Sensor | Open or short, malfunctioning sensor | |
2214 | Maximum engine speed exceeded | ECU fault causes over-revving, bad shifting, signal from engine speed sensor defective | |
2222 | Manifold absolute pressure sensor | Vacuum line to Digifant ECM fault, sensor inside of ECM fault | |
2223 | Atmospheric Pressure Sensor | Faulty sensor or wiring | |
2224 | Turbocharger Maximum Boost Pressure Exceeded | Faulty Wastegate or Turbocharger | |
2231 | Idle speed stabilizer has exceeded adaptive range | Throttle valve adjustment incorrect, incorrect timing, evap system faulty, or intake air leaks | |
2232 | Air flow sensor potentiometer, or Mass Airflow Sensor | Defective air flow sensor potentiometer/MAF or wiring | |
2233 | Vane Airflow Meter, or Mass Airflow Sensor | Defective sensor or wiring | |
2234 | Supply voltage too high or low | Battery voltage above/below 16/10v, Faulty wiring, wiring connections, fuse S54 or ABS relay | |
2242 | CO fuel trim potentiometer | Sensor malfunctioning, wiring fault | |
2312 | Coolant temperature sensor | Defective coolant temperature sensor or wiring | |
2314 | Engine/transmission electrical connection | Open or short in circuit, no connection between TCM and ECU | |
2322 | Intake air temperature sensor | CO fuel trim potentiometer malfunctioning, sensor malfunctioning, wiring fault | |
2323 | Air flow sensor potentiometer, vane airflow meter, or mass airflow sensor | Defective sensor or wiring | |
2324 | Mass airflow sensor, or vane airflow meter | Signal high/low, sensor malfunctioning, short to positive/ground, air leak | |
2341 | Oxygen sensor control exceeded, inoperative | Probe defective, intake air leaks, injectors malfunctioning, fuel pressure low/high, hot wire for MAF not burning cleanly, evap system fault | |
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 | |
2343 | Mixture Control adjustment, lean | Fuel pressure fault, misfire, air leaks, injectors leaking, hot wire not burning off cleanly, Oxygen sensor regulation faulty, exhaust leak, evap fault | |
2344 | Mixture Control adjustment, rich | 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 | |
2412 | Intake air temperature sensor | Sensor malfunctioning, wiring fault | |
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 | |
4312 | EGR vacuum regulator solenoid valve | EGR valve malfunction, wiring shorted to ground/positive | |
4314 | Shift lock solenoid | Open or short, malfunctioning solenoid | |
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 | |
4442 | Turbocharger Boost Pressure Solenoid Valve | defective valve or wiring | |
4444 | No faults recorded | - |