I have a check engine light on. The code reader displays code P0133 O2 sensor slow response bank 1 sensor 1
I have replaced the oxygen sensor twice, the fuel cap, spark plugs, fuel filter, intake manifold gaskets. All to the tune of $1400 but the light keeps coming back on.
Using a scan tool make certain the Sensor is working. If it is not working look into the wiring harness and connections. Next check for exhaust leaks, especially if any work has been done to the exhaust.
Code P0133 – Oxygen Sensor Circuit Slow Response (Bank 1, Sensor 1)
Probable Causes:
- Sensor or solenoid faulty
- Connector terminal contact is damaged or corroded
- Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
- Update control unit software – Check for the latest control unit update
- Powertrain or Engine Control Module faulty
- .Fuel pressure – Pump, regulator, filter or lines
- HO2S sensor contamination/damaged
- Exhaust leaks or restrictions