P2239 – BMW DTC

BMW DTC P2239 – O2 Sensor Positive Current Control Circuit High (Bank 1 Sensor 1)

DTC P2239 meaning on BMW

The Diagnostic Trouble Code (DTC) P2239 for BMW refers to the O2 Sensor Positive Current Control Circuit High on Bank 1 Sensor 1. This code indicates that there is a high voltage condition detected in the positive current control circuit of the oxygen sensor located in the exhaust system before the catalytic converter on the bank 1 side of the engine.

BMW DTC P2239 symptoms

Symptoms of DTC P2239 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Decreased fuel efficiency
• Engine running rough or misfiring
• Reduced engine performance

BMW DTC P2239 causes

Common causes of DTC P2239 on a BMW include:

• Faulty oxygen sensor (Bank 1 Sensor 1)
• Wiring or connector issues in the O2 sensor circuit
• Exhaust leaks near the oxygen sensor
• Engine running rich or lean

BMW DTC P2239 seriousness

While DTC P2239 may not cause immediate drivability issues, it is important to address this code promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance and fuel efficiency.

How to diagnose DTC P2239 on BMW

To diagnose DTC P2239 on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors in the O2 sensor circuit for any damage or corrosion
3. Check for exhaust leaks near the oxygen sensor
4. Test the oxygen sensor using a multimeter or scan tool

How to fix DTC P2239 on BMW

To fix DTC P2239 on a BMW, the following steps may be taken:

1. Replace the faulty oxygen sensor (Bank 1 Sensor 1)
2. Repair any damaged wiring or connectors in the O2 sensor circuit
3. Address any exhaust leaks near the oxygen sensor
4. Perform a thorough inspection of the engine for running rich or lean conditions

How to erase DTC P2239 on BMW

After addressing the underlying issue causing DTC P2239 on a BMW, the fault code can be erased using a diagnostic scanner. This will reset the Check Engine Light and clear the code from the vehicle’s memory.