BMW DTC P1167 – HO2S Heater Coupling Signal Too High (Bank 1 Sensor 1)
DTC P1167 meaning on BMW
The Diagnostic Trouble Code (DTC) P1167 for BMW indicates that the Heated Oxygen Sensor (HO2S) Heater Control Circuit has detected a signal that is too high on Bank 1 Sensor 1. This means that the control module has detected an abnormal voltage level in the heater circuit of the oxygen sensor located in the exhaust system of the vehicle.
BMW DTC P1167 symptoms
Symptoms of DTC P1167 on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
BMW DTC P1167 causes
Common causes of DTC P1167 on a BMW include:
- Faulty oxygen sensor heater
- Wiring or connector issues in the oxygen sensor heater circuit
- Defective engine control module (ECM)
- Blown fuse related to the oxygen sensor heater circuit
BMW DTC P1167 seriousness
While DTC P1167 may not cause immediate drivability issues, it is important to address this fault as it can lead to decreased fuel efficiency and potential long-term damage to the vehicle’s emissions system. Ignoring this fault can also result in the vehicle failing an emissions test.
How to diagnose DTC P1167 on BMW
To diagnose DTC P1167 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the wiring and connectors in the oxygen sensor heater circuit for any damage or corrosion
- Check the fuse related to the oxygen sensor heater circuit for continuity
- Test the oxygen sensor heater for proper resistance
- Verify the operation of the engine control module (ECM)
How to fix DTC P1167 on BMW
To fix DTC P1167 on a BMW, you can try the following solutions:
- Replace the faulty oxygen sensor heater
- Repair or replace any damaged wiring or connectors in the oxygen sensor heater circuit
- Replace the blown fuse related to the oxygen sensor heater circuit
- If necessary, replace the engine control module (ECM)
How to erase DTC P1167 on BMW
To erase DTC P1167 on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s ECM memory. After addressing the underlying issue that caused the fault code, you can then erase the code to reset the Check Engine Light.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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