Component Inspection

Engine Control
P0137 HO2S Circuit Low Input (Bank 1 / Sensor 2) - Component Inspection

Component Inspection

1. Warm up the engine to normal operating temperature and check that HO2S signal is active.
2. Connect Scantool and monitor the "O2 SNSR VOLT.(B1/S2)" parameter on the Scantool data list.
Test Condition : Ignition "ON" & Engine "ON" & In Idle("Closed Loop")conditionSpecification : Above 0.6V




3. Is sensor data near the specified value?
YES
> Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
> Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of Vehicle Repair" procedure.