AUDI OBD trouble or faulty codes chart

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0000 No malfunction recognized Indicated by one pulse of the light every 15 seconds or so If there is a malfunction or complaint; the malfunction fault is not recognized by On Board Diagnostics End of Diagnostic Output

1111 Engine Control Module (ECM / ECU) Transmission Control Module ( TCM ) Electrical interferences from outside sources ECU is malfunctioning Poor ground connections to the computer Defective memory circuits in the control unit Bad checksum in computer chip from a tuner or a tuners scrambler

1113 Transmission Solenoid Valve 1

1121 Transmission Solenoid Valve 2

1123 Transmission Solenoid Valve 3

1124 Transmission Mechanical/Hydraulic fault Defective clutch or valve body

1131 Transmission Solenoid Valve 4

1133 Transmission Solenoid Valve 5

1141 Transmission Solenoid Valve 6

1143 Transmission Solenoid Valve 7

1231 Vehicle Speed Sensor (VSS) (G 68) No change in signal or mechanical malfunction
Open circuit or short circuit from vehicle speed sensor

1314 Multi-Function Switch (F 125)

1323 Kickdown switch (F 8)

1332 Trans-program switch (E 122)

1333 Transmission oil temp sender (G93)

2111 Engine speed sensor (G 28) No change in signal or mechanical malfunction Mounting base of G28 loose Distance from G28 to ring gear greater than 3/64 inch Broken teeth on flywheel ring gear G28 RPM sensor malfunctioning Open or short circuit Defective sensor & cables, metal fragments on flywheel teeth Debris on G28 Connector on G28 swapped with connector on G4. ECM malfunctioning

2112 Crankshaft Position Sensor (CKP) (G 4) No change in signal or mechanical malfunction Sensor is not detecting flywheel pin Flywheel pin damaged or missing, Sensor in not installed correctly Distributor hall sensor out of adjustment

2113 Camshaft Position Sensor (G 40) No change in signal Open circuit or short circuit to positive Signal to positive Short circuit to ground Signal to ground Mechanical malfunction, hall sender defective Faulty basic setting, or distributor alignment Cambelt has jumped a tooth If 1551/1552 Shows sporadic disregard

2114 Hall Sensor (G 40) Hall sensor not at reference mark

2121 Closed throttle position switch (CTP) (F 60) Usually Part of Idle/Full Throttle Switch Assembly Throttle body sticking Floor mat presses on accelerator pedal Throttle cable adjustment Switch stuck open or closed Internal solder connections poor or broken or contacts contaminated Wiring broken or shorted Moisture in throttle body connector

2122 Engine speed signal missing

2123 Full Throttle Switch Part of Idle/Full Throttle Switch Assembly Switch stuck open or closed Internal solder connections poor or broken or contacts contaminated Wiring broken or shorted

2131 Brake Light Switch Open circuit

2141 First Knock Regulation (00535) Second Knock Regulation (00536) 00577 Cyl 1
00578 Cyl 2 No change in signal Maximum control limit exceeded ECU cannot control excessive knock Timing has been retarded to maximum Low boost on 20V Excessive boost, Fuel octane too low, Compression to high

2142 Knock Sensor (KS) #1 (G 61) Open or short circuit, Defective sensor Check sensor and wiring Symptom: Timing retarded, High fuel consumption, power loss, Boost pressure not attained

2143 Dual knock sensor engines Knock sensor II 00579 Cyl 3 00580 Cyl 4 00581 Cyl 5 00582 Cyl 6 #2, (Cylinders 3, 4, 5) Excessive knock, timing is being retarded by maximum amount 7.8 degrees.
Fuel octane too low, Excessive Compression, excessive boost

2144 Knock Sensor (KS) II (G 66) Open or short circuit, Defective sensor or wiring Symptom: Timing retarded, High fuel consumption, power loss, Boost pressure not attained

2212 Throttle Position (TP) Sensor (G 69) Open circuit short to positive in sensor Short to ground in sensor or wires between sensor and computer Signal outside tolerance range Signal too high from computer malfunction Signal too low from dampness and/or corrosion at sensor connector Impossible signal

2214 RPM exceeds maximum programmed Engine has exceeded rev limit due to improper shifting Example 7440 on AAN & 3B engines or 6793 for ABH engine

2221 Manifold Pressure Sensing Hose to ECU detached, leaking, pinched, or plugged Pressure is too low, too high, or not correct for mass of air metered. Symptom: Loss of Power

2222 Manifold Absolute Pressure Sensor (G 71) Located in the ECU Hose between intake manifold and ECM open, pinched, plugged or bent Fluid separator in the hose between manifold and ECM full of fluid Wastegate valve malfunctioning Wastegate frequency valve malfunctioning Pressure sensor in the ECM is malfunctioning Turbocharger in malfunctioning Repair or replace ECU

2223 Barometric Pressure Sensor ( F 96) 2224 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

2231 Idle speed regulation Idle Air Control valve (N 71) binds when closed Mass Air Flow Sensor (G 70) offset Resistance at terminal connector of (N 71) Idle Air Control valve (N 71) binds when open Air leak between Mass Air Flow Sensor (G 70) and Idle Air Control valve (N 71)

2234 Supply voltage to ECM Greater than 16 volts Lower than 6 volts Defective battery Battery discharged Alternator malfunctioning Engine was started with two batteries in series Poor Ground for ECM Current drain with ignition off

2242 CO Fuel Trim Potentiometer (G74)

2312 Engine Coolant Temperature (ECT) Sensor (G 62) Open circuit to ECM Short to ground Moisture in (G 62) connector Resistance between sensor and ECM Malfunctioning sensor (G 62) input circuit in ECM malfunctioning Symptom: Cold starting difficulties at low temperatures, Poor idle and acceleration during warm up

2314 Engine/Transmission electrical connection Signal to negative Open circuit Short between valve wires

2322 Inlet Air Temp (IAT) Sensor (G 42) Short circuit to ground Open circuit between (G 42) and ECM Malfunctioning sensor (G 42) input circuit in ECM malfunctioning Symptom: Slight power loss, Increase in fuel consumption

2324 Mass Air Flow (MAF) Sensor (G 70) Signal too low Signal too high Engine Control Module (ECM) defective

2341 Heated Oxygen Sensor (OS2) (G 39) Maximum control limit exceeded Fuel tank less than 2.5 gallons reducing fuel pressure

2342 Heated Oxygen Sensor Defective Sensor or Wiring to sensor defective Resistance Heater in probe faulty Symptom: Emissions not within specifications

2411 EGR Temperature Sensor (00585) Exhaust Gas Recirculation (EGR) (00586)

2413 Mixture Adaptation Exceeded or Undershot adaptation limit (multiplicative) Exceeded or Undershot adaptation limit (additive)

4312 Exhaust Gas Recirculation valve (N 18)

4314 Selector lever lock solenoid (N 110)

4332 Ignition output 00609 output 1 00610 output 2 00611 output 3

4333 Intake Manifold Changeover Valve (N156)

4343 Evaporative Emission (EVAP) Canister Purge Valve (N 80) Signal to positive Signal to negative

4434 Oxygen Sensor probe heating 4411 Fuel Injector Cyl 1 or 1 & 5

4412 Fuel Injector Cyl 2 or 2 & 7

4413 Fuel Injector Cyl 3 or 3 & 6 4414 Fuel Injector Cyl 4 or 4 & 8

4421 Fuel Injector Cyl 5

4422 Fuel Injector Cyl 6 4431 Idle Air Control (IAC) valve (N71) Air leak in intake air system 2nd stage of Throttle Body does not close

4442 Wastegate Bypass Regulator Valve (N 75)

4444 No Faults have been recorded in the ECU's memory. This does not mean that there may not be a problem Just that the computer is unaware of the problem.