Signal Too Low

Signal too low

Checking the components and wiring
Check the intake system for air leakage.
Check the exhaust system for air leakage.
Checking fuel and residual pressure.
Check the compression of the engine.
Remedy as necessary.

Note! Try a new catalytic converter if the above fault-tracing does not remedy the fault.

Other information
- Air leaks in the intake system, checking Air Leaks In the Intake System, Checking
- Air leakage exhaust system, check Air Leakage Exhaust System, Check
- Fuel system pressure, checking, B5254T7 Fuel System Pressure, Checking
- Catalytic converter, B5254T7 Service and Repair





Continue - Verification

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Verification




Verification

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








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Test drive the vehicle and perform a TRIP schedule. See Verifying repairs Verifying Repairs
- Connect VCT2000 to the data link connector (DLC) without switching off the engine.

Note! If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated.

Read off the dynamic for the front heated oxygen sensor (HO2S).
The value should be higher than 1.0.





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

Attempt New Test - Checking the components and wiring

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