Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

EFI-212 Front heated oxygen sensor (HO2S), signal

Checking cables and terminals




- Check cable between front heated oxygen sensor (HO2S) terminal 4 and engine control module (ECM) #A32 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between the front heated oxygen sensor (HO2S) terminal 3 and engine control module (ECM) #A33 and the cable between the rear heated oxygen sensor (HO2S) terminal 3 and engine control module (ECM) #A19 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between rear heated oxygen sensor (HO2S) terminal 4 and engine control module (ECM) #A34 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between idle air control (IAC) valve terminal 3 and engine control module (ECM) #A11 for an intermittent short-circuit to closing coil signal cable.

Continue - Fault-tracing information
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).

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Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking cables and terminals

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