Fault Code Description |
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The diagnosis monitors the mixture adaptation process. Fault monitoring conditions: The fault is detected if the fuel-air mixture is too lean and, depending on the load condition, has to be enriched by 25 to 30%. |
Fault Code Conditions | |
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General Conditions |
Temperature precondition: - None Time precondition: - None Other preconditions: - Engine running. - Tank ventilation system not active. Control unit voltage: 9 V to 16 V. |
Terminal Condition |
Terminal 15 on |
Terminal Condition |
PRD status: Driving |
Terminal Condition |
PRD status: Testing-analysis-diagnosis |
Driving Conditions |
Note: The designations of terminal status or PWF status apply according to the vehicle electrical system of the vehicle. |
Fault Time Condition |
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The fault is entered when it is applied for longer than 1 minute. |
Service Plan |
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Check if faults are entered for the following components/functions, then remedy these first: - Oxygen sensor before catalytic converter - Hot film air mass meter - Intake pipe pressure sensor - Intake air temperature sensor - Electromotive throttle actuator - Fuel tank vent valve - Camshaft sensor - High-pressure fuel system - Low-pressure fuel system - Valvetronic intake adjuster - Voltage supply sensor system/actuator 5 V - Ethanol sensor (only in E100 vehicles) Check air intake system for tightness, checking the following components as well at the same time: - Crankcase ventilation - Oil filler cap - Oil dipstick - Tank ventilation system - Brake servo - Cylinder head cover Check exhaust system for leak tightness. Rule out poor fuel grade. Check injectors with the test module for misfiring detection and replace if necessary. Then reset adaptations. |
Fault Impact |
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- The engine operates in its emergency program. - Lack of power. - Rough engine running. |
Warnings | |
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Warning Lights |
Malfunction indicator lamp |
Control Center Messages |
Service Notes |
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- Reset mixture adaptation after a repair. |