Signal Too High. Intermittent Fault

Signal too high. Intermittent fault

Checking connectors and components




- Ignition off
- Check the rear heated oxygen sensor (HO2S) and control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults
- Check the signal cable between connector terminal 4 for the rear heated oxygen sensor (HO2S) and control module terminal 44 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults
- Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- For information about signals, see Signal specification Signal Specification
- To replace the rear heated oxygen sensor (HO2S), see Replacing lambda sond rear Service and Repair.













Continue - Resetting fuel trim

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Resetting fuel trim

Note! It is important that the fuel trim is reset after this diagnostic trouble code (DTC) is remedied. If this is not done there may be driveability problems even though the fault is no longer present.




- Ignition on.




- Reset the fuel trim by clicking on the VCT 2000 symbol

Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking connectors and components

FAULT FOUND - DONE

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