Signal Too High
Signal too high
Checking components and wiring
Check the resistance of the heated oxygen sensor (HO2S) between terminals #3 and #4.
Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A70 (#B10). Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- For information about signals on 6 cylinder engines, see Signal specification Signal Specification
- To connect the breakout box and access the control module, see Connecting the breakout box, B5254T2 Connecting the Test Box
- To access or replace the heated oxygen sensor (HO2S), see Heated oxygen sensors (HO2S), replacing Heated Oxygen Sensor (HO2S), Replacing
- For information about the resistance values, see Component specifications Specifications
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the components, reconnect the connectors etc.
- Test drive the car according to the TRIP schedule, see Verifying repairs Verifying Repairs
- Do not switch off the engine after the test drive
- Connect the car to VIDA again. Read off the diagnostic trouble code (DTC) status for the front heated oxygen sensor (HO2S)
- There must not be any faults when the diagnostic is complete.
Was a fault detected?
Yes - Verification completed
No - Fault-tracing information
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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 and wiring
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