P1165
Air/Fuel Ratio Sensor 1 Circuit Range/Performance
P1165 is an OBD-II diagnostic trouble code meaning: Air/Fuel Ratio Sensor 1 Circuit Range/Performance. Common causes: air/fuel ratio sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $33–89.
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Check Engine light comes on
- Reduced engine power
- Increased emissions of harmful substances
Causes
- Air/fuel ratio sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Problems with power or grounding of the sensor
- Engine control unit malfunction
How to Fix
- Check the integrity of the sensor circuit
- Check the sensor connector and contacts
- Check the power supply and grounding of the sensor
- Replace air/fuel ratio sensor if necessary
- Check and, if necessary, update the engine control unit software
Related codes
Error P1165 by Vehicle Brand
FAQ
What does the P1165 code mean?
P1165 is an OBD-II diagnostic trouble code that indicates: Air/Fuel Ratio Sensor 1 Circuit Range/Performance
What causes a P1165 error code?
The most common causes of P1165 include: Air/fuel ratio sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with power or grounding of the sensor.
How do I fix a P1165 diagnostic trouble code?
To fix P1165: Check the integrity of the sensor circuit. Check the sensor connector and contacts. Check the power supply and grounding of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1165?
Yes, but get it checked soon
How much does it cost to fix P1165?
The estimated repair cost for P1165 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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