Current Too Low - Intermittent Fault

ECM-2100 FRONT HEATED OXYGEN SENSOR (HO2S)
CURRENT TOO LOW - INTERMITTENT FAULT

Checking wiring and connectors




Caution!
Do not apply rust solvent spray or grease to the Heated Oxygen Sensor (HO2S) connector.

Check signal cable (+) between control module # A42 and Heated Oxygen Sensor (HO2S) connector terminal 4 for an intermittent short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check signal cable (-) between control module # A41 and Heated Oxygen Sensor (HO2S) connector terminal 3 for an intermittent short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Other information
- To connect the breakout box, Connecting the Breakout Box (ECM)
- To access/replace the control module, Engine Control Module (ECM), Replacing
- To access/replace the heated oxygen sensor (HO2S), Heated Oxygen Sensor (HO2S), Replacing
- For information about signals, Pinout Values and Diagnostic Parameters


Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.