Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking for air leakage in the exhaust system
Check for air leakage. See Checking for air leakage in the exhaust system Checking For Air Leakage In the Exhaust System.
Remedy as necessary.





Was there any air leakage?

Yes - ECM-ver1

No - Replacing the component

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Replacing the component
Try a new heated oxygen sensor (HO2S). See Adapter wiring switch, replacing Adapter Wiring Switch, Replacing.

Other information
- To connect the breakout box and access the control module, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box
- For information about signals see Signal specification Signal Specifications.






Continue - Verification

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Verification




Verification

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








- Ignition off.
- Reconnect connectors, reinstall components.
- Test drive car as follows:
A/C on
Drive the car so that idle, normal and high speeds are reached. Let the car operate in these phases for a few minutes.
Accelerate at full throttle a number of times so that high boost pressure is reached (applies only to turbo models).
Total test drive time must be 15 minutes.

Note! After test driving the engine should not be turned off. The test drive must be carried out again.

Connect VIDA again and read out the heated oxygen sensor (HO2S) diagnostic trouble code (DTC) status.
The text NOT READY is displayed if diagnosis is underway.









Is FAULT NOT REGISTERED displayed?

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 for air leakage in the exhaust system

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