P1131
Lack Of HO2S Switch - Sensor Indicates Lean
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–61 (est.)
Symptoms
- Increased fuel consumption
- Unstable engine idling
- Power Loss
- Check Engine light comes on
Causes
- Oxygen sensor malfunction
- Air leaks in the intake tract
- Problems with the fuel pump or injectors
- DMRV malfunction
- Damage to sensor wiring
How to Fix
- Check the tightness of the intake tract
- Check the operation of the fuel system
- Check the condition of the oxygen sensor and its wiring
- Replace a faulty oxygen sensor
- Reset the error code and check if it returns