Fault-Tracing Information

Fault-tracing

Checking components
Check the intake system for air leakage
Check the fuel and residual pressure. Check for high fuel pressure. Check for leaking injectors.
Click on the VCT2000 symbol and check the mass air flow sensor by reading its correction factor. The value should be between 0.8 and 1.2.

Note! Air leakage must not occur during the reading.

Check the engine oil visually for contaminants.
Check that the oil level is between the minimum and maximum markings

Hint: If the above fault-tracing does not remedy the fault, try replacing the heated oxygen sensor (HO2S), as the diagnostic trouble code (DTC) can also be stored by a damaged heated oxygen sensor (HO2S).

Remedy as necessary.

Other information
- Fuel system pressure, checking, B5254T5 Fuel System Pressure, Checking
- Oxygen sensor (Catalyst monitor sensor), B5254T5 Service and Repair
- Mass air flow (MAF) sensor, B5254T5 Service and Repair





Continue - Verification

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Verification




Verification
Read out and note the adaptation value for the vehicle.

Note! Do not erase diagnostic trouble codes (DTCs) as this also resets the adaptation values!

Test drive the vehicle and perform a TRIP
Verifying repairs, B5254T5 Verifying Repairs
Read off the fuel trim.
Check that the adaptation value has approached 1 compared with the noted value.
Check that the adaptation value is between 0.9 and 1.1.





Is the value OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking components

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