P0140 Diagnostic Trouble Code Discussion for December 2007
Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity
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| Help Request | Posted | |
| 2003 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K43 P0140: Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity. O2 sensor 2 readings were flat lined at 430 mv. Disconnected sensor connector and found corrosion on terminals. I am trying to find the source of the corrosion in the connector, I am suspecting a possible infiltration at a splice, but as yet have not been able... |
December 05, 2007 |
