P1164
Air/Fuel Ratio Sensor 1 Range/Performance Problem
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$33–89 (est.)
Symptoms
- Increased fuel consumption
- Unstable engine idling
- Loss of engine power
- Check Engine light comes on
- Increased emissions of harmful substances
Causes
- Faulty air/fuel ratio sensor
- Open or short circuit in the sensor circuit
- Poor connection or corroded connectors
- Sensor contamination due to oil or coolant leak
- Fuel system problems (such as faulty injectors)
How to Fix
- Check the integrity of the sensor circuit and connectors
- Clean connectors and check for corrosion
- Check sensor readings using an OBD-II scanner
- Replace air/fuel ratio sensor if necessary
- Check the fuel system for leaks or malfunctions