P1199
O2S Heater Circuit Bank 2 Sensor 2 Electrical Malfunction
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Unstable engine operation at idle
- Reduced vehicle dynamics
- Possible failures during acceleration
Causes
- Malfunction of the oxygen sensor heating element
- Open or short circuit in wiring harness
- Poor contact in the sensor connector
- Faulty heater circuit relay or fuse
- Problems with the engine control unit
How to Fix
- Check the condition of the heater circuit fuses and relays
- Inspect the wiring harness and sensor connector for damage.
- Measure the resistance of the sensor heater
- If necessary, replace the oxygen sensor
- Check the operation of the system after repair