Signal Missing. Intermittent Fault

Signal missing. Intermittent fault

Checking the wiring

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

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check for a short-circuit to each other.
Check the power supply to heated oxygen sensor (HO2S) terminal #3 and the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check for an intermittent short-circuit to the other wiring for the heated oxygen sensor (HO2S).

Other information
- To connect the breakout box / access the control module, see Connecting the breakout box, B5254T2 Connecting the Test Box
- To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see Adapter wiring switch, replacing Adapter Wiring Switch, Replacing. For other models, see Heated oxygen sensor (HO2S), replacing Heated Oxygen Sensor (HO2S), Replacing
- For information about signals on 5 cylinder engines, see Signal specification Signal Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals.













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 - Exit fault-tracing

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Attempt New Test - Checking the wiring

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