| Fault Code Description |
|---|
|
The diagnosis system monitors the voltage signal of the oxygen sensor after catalytic converter in case of change of the mixture. Fault monitoring conditions: The fault is detected when the signal voltage of the oxygen sensor is permanently less than 0.8 V. |
| Fault Code Conditions | |
|---|---|
| General Conditions |
Temperature precondition: - Catalytic converter temperature greater than 500°C. Time precondition: - Constant exhaust mass flow greater than 50 kg/h. Other preconditions: - Engine running. - Constant-speed driving between 50 km/h and 80 km/h during medium engine speed (1400 rpm to 3240 rpm). - Duration of the constant-speed driving at least 10 min - No fault memory entries that indicate a fault in the fuel-air mixture. Control unit voltage: 11 V to 16 V. |
| Terminal Condition |
Terminal 15 on |
| Driving Conditions | |
| Fault Time Condition |
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The fault is entered immediately. |
| Service Plan |
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Check if faults are entered to the following components/functions, then rectify these first: - Fuel system - Variable camshaft timing control - Tank ventilation - Ignition - Injection system - Crankshaft sensor - Camshaft sensor - Electromotive throttle actuator - Hot-film air mass meter Check exhaust system for leak tightness. Check wiring harness between DME and oxygen sensor after catalytic converter. Check crankcase ventilation. Renew oxygen sensor after catalytic converter. |
| Fault Impact |
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- None |
| Warnings | |
|---|---|
| Warning Lights |
Malfunction indicator lamp |
| Control Center Messages | |
| Service Notes |
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Plug connection should not come in contact with cleaning agents or solvents, damage to the oxygen sensor is possible. |