what is sensor that reads po140 bank one sensor two and where is it

Asked by Mar 04, 2017 at 05:50 PM about the 2002 Chevrolet Blazer

Question type: Maintenance & Repair

1 Answer

73,855

P0140 CHEVROLET - O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2...Possible causes; Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection, Inappropriate fuel pressure, Faulty fuel injectors, Intake air leaks may be faulty, Exhaust gas leaks...Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.

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