Signal Too High

Signal too high

Checking the components and wiring

Caution! Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the resistance of the heated oxygen sensor (HO2S) between terminals #1 and #2.
Check signal cable terminal #1. Check for a short-circuit to supply voltage.
Check the signal cable between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A49 (#A49). Check for a short-circuit to supply voltage.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Component specifications [1][2]Electrical Specifications
- Oxygen sensor (Catalyst monitor sensor) Oxygen Sensor (Catalyst Monitor Sensor)
- 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.




- Reinstall the connectors, components etc.
- Start the engine. Allow the engine to idle for at least 1 minute.
Check that the diagnostic is "Completed" and that the fault status is "No fault detected".





Is the fault status "No fault detected"?

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 the components and wiring

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