Is this for the upstream sensor or the downstream sensor
When I had a scan check down on my car, it came back with a p0131 code. Is this for the upstream sensor or the downstream sensor or both?
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Ken Cappon, there are a few causes for the P0131 code:
- Faulty Front Heated Oxygen Sensor (HO2S) Bank 1
- Front Heated Oxygen Sensor (HO2S) Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor (HO2S) Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks from here
Replacing the Front Heated Oxygen Sensor (HO2S) Bank 1 usually takes care of the problem.
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