P1151 – BMW DTC

BMW DTC P1151 – O2 Sensor Heater Circuit Signal Intermittent (Bank 2 Sensor 1)

DTC P1151 meaning on BMW

DTC P1151 on a BMW indicates an issue with the O2 sensor heater circuit signal for Bank 2 Sensor 1. This fault code specifically points to an intermittent problem with the O2 sensor’s heating element in the upstream sensor on the second bank of the engine.

BMW DTC P1151 symptoms

Symptoms of DTC P1151 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Poor fuel economy
• Rough idling or engine misfires
• Reduced engine performance

BMW DTC P1151 causes

Common causes of DTC P1151 on a BMW include:

• Failed O2 sensor heater circuit
• Wiring or connector issues in the O2 sensor circuit
• Faulty engine control module (ECM)

BMW DTC P1151 seriousness

While DTC P1151 may not cause immediate drivability issues, it can lead to poor engine performance and increased emissions. Ignoring this fault code can result in potential damage to the catalytic converter and other engine components over time.

How to diagnose DTC P1151 on BMW

To diagnose DTC P1151 on a BMW, you can follow these steps:

1. Use an OBD-II scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors related to Bank 2 Sensor 1 O2 sensor
3. Check the O2 sensor heater circuit for continuity and proper voltage
4. Perform a visual inspection of the O2 sensor for any physical damage

How to fix DTC P1151 on BMW

To fix DTC P1151 on a BMW, you can try the following solutions:

1. Replace the Bank 2 Sensor 1 O2 sensor if it is faulty
2. Repair any damaged wiring or connectors in the O2 sensor circuit
3. Check and replace the ECM if necessary

How to erase DTC P1151 on BMW

To erase DTC P1151 on a BMW, you can clear the fault code using an OBD-II scanner. After fixing the underlying issue causing the fault code, you can reset the ECM by clearing the code and performing a drive cycle to ensure the code does not return.

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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