Signal Too Low

Signal too low

Checking the intake system
Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.
Check the induction system for air leaks. In particular, check the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit. Check for leakage and damage.
Check the inside of the throttle body (TB). Check for contamination. When the throttle body (TB) is contaminated, the air flow to the engine is impaired and diagnostic trouble code (DTCs) or fault symptoms can occur. Clean the throttle body (TB) if needed.
Remedy as necessary.

Other information
- Air leakage in the intake system, checking, B5244T5, B5254T2 Air Leaks in the Intake System, Checking
- Throttle body (TB), cleaning, B5254T2 Procedures
- Mass air flow (MAF) sensor, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals






Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
- Read off and make a note of the adaptation value.
- Start the engine. Increase the engine speed (RPM) a couple of times.
- Read off the adaptation value and check that the adaptation value approaches 1.









Does the adaptation value approach 1?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the intake system

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