P1155
Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1
P1155 is an OBD-II diagnostic trouble code meaning: Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1. Common causes: open or short circuit in the sensor heating circuit, malfunction of the air/fuel ratio sensor itself. Estimated repair cost: $39–133.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Unstable engine operation at idle
- Reduced engine power
- Dips during acceleration
Causes
- Open or short circuit in the sensor heating circuit
- Malfunction of the air/fuel ratio sensor itself
- Problems with the wiring harness or connectors
- Faulty heating circuit relay or fuse
- Problems with the engine ECU
How to Fix
- Check the integrity of the sensor heating circuit
- Inspect connectors and wiring harness for damage
- Check the resistance of the sensor heating element
- Check the voltage in the heating circuit
- If necessary, replace the air/fuel ratio sensor
Related codes
Error P1155 by Vehicle Brand
FAQ
What does the P1155 code mean?
P1155 is an OBD-II diagnostic trouble code that indicates: Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1
What causes a P1155 error code?
The most common causes of P1155 include: Open or short circuit in the sensor heating circuit; Malfunction of the air/fuel ratio sensor itself; Problems with the wiring harness or connectors; Faulty heating circuit relay or fuse.
How do I fix a P1155 diagnostic trouble code?
To fix P1155: Check the integrity of the sensor heating circuit. Inspect connectors and wiring harness for damage. Check the resistance of the sensor heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1155?
Yes, but get it checked soon
How much does it cost to fix P1155?
The estimated repair cost for P1155 is $39–133. Actual cost depends on your vehicle, location, and labor rates.
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