Trouble Code Table
| Trouble Codes | Information Sensor | Cause of Fault |
|---|---|---|
| 12 | Start of diagnosis | (only for blink code readout) |
| 13 | Oxygen sensor | No oxygen sensor signal |
| 14 | Coolant temperature sensor | Voltage low |
| 15 | Coolant temperature sensor | Voltage high |
| 16 | Knock sensor | No knock sensor signal |
| 18 | Knock control system | |
| 19 | Crankshaft pulse pick-up | Incorrect engine speed signal |
| 21 | Throttle valve potentiometer | Voltage high |
| 22 | Throttle valve potentiometer | Voltage low |
| 24 | Odometer frequency sensor | No odometer frequency signal |
| 25 | Injection valve | Voltage low |
| 28 | Fuel pump relay | Contact problems |
| 29 | Fuel pump relay | Voltage low |
| 32 | Fuel pump relay | Voltage high |
| 35 | Idle speed stepper motor | Deviation from nominal engine speed |
| 44 | Oxygen sensor | Exhaust constantly too lean |
| 45 | Oxygen sensor | Exhaust constantly too rich |
| 46 | EST A + B | Voltage high |
| 49 | Battery | Voltage high |
Trouble Code Table (continued)
| Trouble Codes | Information Sensor | Cause of Fault |
|---|---|---|
| 51 | EPROM | |
| 55 | Control unit or EEPROM | |
| 63 | EST B | Voltage low |
| 64 | EST A | Voltage low |
| 67 | Mass air flow meter | Mass air flow meter signal is outside the permissible tolerance |
| 68 | Mass air flow meter | Faulty mass air flow meter signal |
| 72 | EST A + B | Lead interruption |
| 81 | Injection valve | Voltage high |
| 92 | Camshaft sensor | |
| 93 | Quad driver module |
Note:
The terms information sensor and cause of fault in the trouble code table provide only one indication to the cause of the fault, i.e. when a trouble code is indicated, the component indicated in the trouble code table must not necessarily be defective. Connecting leads, plug connections and the voltage supply must also be included in the trouble-shooting.