Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

Checking components and wiring
Check that the resistance in the heated oxygen sensor (HO2S) preheating element, measured between probe terminals 1 and 2, is approximately 5-10 ohms at +20° C.
Check the signal cable between engine control module (ECM) terminal 63 and heated oxygen sensor (HO2S) terminal 2 for an intermittent short-circuit to ground. Remedy 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
- To access / replace the heated oxygen sensor (HO2S), see Replace the front heated oxygen sensor (HO2S) Replace The Front Heated Oxygen Sensor (HO2S).













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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).

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No - FAULT FOUND

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Attempt New Test - Checking components and wiring

FAULT FOUND - DONE

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