P1198
O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction
P1198 is an OBD-II diagnostic trouble code meaning: O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction. Common causes: open or short circuit in the sensor heater circuit, oxygen sensor malfunction. Estimated repair cost: $17–89.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Increased level of harmful emissions
- Unstable engine operation at idle
- Reduced engine power
Causes
- Open or short circuit in the sensor heater circuit
- Oxygen sensor malfunction
- Wiring harness damage
- Poor contact in the sensor connector
- Faulty heater circuit relay or fuse
How to Fix
- Check the integrity of the fuse and relay of the heater circuit
- Inspect the wiring harness and connectors for damage
- Check the resistance of the sensor heater (should be 5-20 Ohms)
- Check the voltage in the heater circuit
- If necessary, replace the oxygen sensor
Related codes
Error P1198 by Vehicle Brand
FAQ
What does the P1198 code mean?
P1198 is an OBD-II diagnostic trouble code that indicates: O2S Heater Circuit Bank 1 Sensor 2 Electrical Malfunction
What causes a P1198 error code?
The most common causes of P1198 include: Open or short circuit in the sensor heater circuit; Oxygen sensor malfunction; Wiring harness damage; Poor contact in the sensor connector.
How do I fix a P1198 diagnostic trouble code?
To fix P1198: Check the integrity of the fuse and relay of the heater circuit. Inspect the wiring harness and connectors for damage. Check the resistance of the sensor heater (should be 5-20 Ohms). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1198?
Yes, but get it checked soon
How much does it cost to fix P1198?
The estimated repair cost for P1198 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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