ECU Fault Code Listing
10V Turbo Engines 1986-88 5000 Turbo and 5000 Turbo Quattro,
1989-91 200 Turbo and 1989-90 200 Turbo Quattro,
UK ur-quattro with MB Engine .

NOTE: The fault codes shown below indicate that the ECU has recorded a problem with one or more of the following: A system component, the wiring, the wiring connections, or from a engine mechanical problem (vacuum leak, low compression, etc.).

If you get multiple fault codes recorded, step through the fault code reading sequence and write down all the fault codes that were recorded. After you locate the source of the problem for the "first" fault code you read, you may want to then clear all the fault codes stored and drive the car again to see if the other fault codes are stored again.

In some cases multiple fault codes are recorded even though there may be only one problem with the system. Code Number Source of Fault code Possible cause Recommended Check or Repair Symptom in some cases

1111 (Blink Fault Code), VAG1551/2 Fault Code Number 65535 Engine Control Unit (ECU) Defective memory circuits Replace ECU
2111 (Blink Fault Code), VAG1551/2 Fault Code Number 00513 RPM sensor Open or short circuit, Defective sensor & cables, metal fragments on flywheel teeth
2112 (Blink Fault Code), VAG1551/2 Fault Code Number 00514 Timing (62 degrees BTDC) reference sensor Flywheel pin damaged/missing, Mis-located Sensor, flywheel pin, distributor hall sensor out of adjustment
2113 (Blink Fault Code), VAG1551/2 Fault Code Number 00515 Hall sender in distributor Distributor alignment, faulty sender, Mis-located sensor & distributor
2121 (Blink Fault Code), VAG1551/2 Fault Code Number 00516 Idle switch inside Throttle switch Switch open ckt, stuck closed Switch defective (Internal solder connections intermittent) or wiring problem
2123 (Blink Fault Code) , VAG1551/2 Fault Code Number 00517 Full load switch inside Throttle switch Switch open ckt, stuck closed Switch defective (Internal solder connections intermittent) or wiring problem
2141 (Blink Fault Code), VAG1551/2 Fault Code Number 00535 Knock regulator #1 Excessive knock, timing is being retarded by maximum amount 7.8 degrees, Low boost on 20V, Fuel octane too low, Excessive Compression, excessive boost
2142 (Blink Fault Code), VAG1551/2 Fault Code Number 00524 Knock sensor #1 Open or short circuit, Defective sensor Check sensor and wiring Symptom: Timing retarded, High fuel consumption, power loss, Boost pressure not attained
2143 (Blink Fault Code), VAG1551/2 Fault Code Number 00536 Knock sensor #2, (Cylinders 3, 4, 5) 1989-91 200TQ, 1989-91 200T, with dual knock sensor MC engine, Excessive knock, timing is being retarded by maximum amount 7.8 degrees. Fuel octane too low, Excessive Compression, excessive boost
2144 (Blink Fault Code), VAG1551/2 Fault Code Number 00540 Knock Sensor #2, (Cylinders 3, 4, 5) 1989-91 200TQ, 1989-91 200T, with dual knock sensor MC engine, Open or short circuit, Defective sensor or wiring Symptom: Timing retarded, High fuel consumption, power loss, Boost pressure not attained
2214 (Blink Fault Code), VAG1551/2 Fault Code Number 00543 Engine Over-revved (1989-91 200TQ, 1989-91 200T), also UK MB engine. Engine has exceeded rev limit (~6700-6900 on MC engine Driver has heavy right foot.
2221 (Blink Fault Code), VAG1551/2 Fault Code Number 00575 Manifold Pressure too low, too high, control difference. Vacuum hose to ECU pressure sensor Vacuum hose missing or leaking, Check hose Symptom: Loss of Power
2222 (Blink Fault Code), VAG1551/2 Fault Code Number 00519 Pressure sensor ECU Pressure sensor defective, Repair or replace ECU
2224 (Blink Fault Code), VAG1551/2 Fault Code Number 00544 Over boost condition(1989-91 200TQ, 1989-91 200T) UK MB engine. Boost pressure exceeded 1.6 bar for MC, 1.8 bar for MB Waste gate or pressure hose, Waste Gate Solenoid/hose problem
2312 (Blink Fault Code), VAG1551/2 Fault Code Number 00522 Coolant sensor Open or short circuit, Defective sensor or wiring Symptom: Cold starting difficulties at low temperatures, Poor idle and acceleration during warm up
2322 (Blink Fault Code), VAG1551/2 Fault Code Number 00523 Inlet air temp Open or short circuit Defective sensor or wiring Symptom: Slight power loss, Increase in fuel consumption
2342 (Blink Fault Code), VAG1551/2 Fault Code Number 00523 Oxygen Sensor Sensor Wiring or Sensor defective Symptom: Emissions not within specifications
4444 (Blink Fault Code), VAG1551/2 Fault Code Number 00000 No Faults have been recorded.
0000 (Blink Fault Code), VAG1551/2 Fault Code Number 00000 End of Diagnostic Output

About Us Privacy Policy Terms of Use Links Customer Service Safety Information Home