P2237 – BMW DTC

BMW DTC P2237 – O2 Sensor Positive Current Control Circuit/Open (Bank 1 Sensor 1)

DTC P2237 meaning on BMW

The Diagnostic Trouble Code (DTC) P2237 for BMW indicates an issue with the O2 Sensor Positive Current Control Circuit/Open on Bank 1 Sensor 1. This means that there is an open circuit or a lack of continuity in the wiring or connector related to the oxygen sensor located before the catalytic converter on the bank 1 side of the engine.

BMW DTC P2237 symptoms

Symptoms of DTC P2237 on a BMW may include:

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

BMW DTC P2237 causes

Common causes of DTC P2237 on a BMW include:

• Faulty O2 sensor
• Open or short circuit in the wiring harness
• Corrosion or poor connection in the sensor connector
• Issues with the engine control module (ECM)

BMW DTC P2237 seriousness

While DTC P2237 may not cause immediate drivability issues, it is important to address this problem promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance and fuel efficiency.

How to diagnose DTC P2237 on BMW

To diagnose DTC P2237 on a BMW, you can follow these steps:

1. Use an OBD-II scanner to retrieve the fault code and confirm P2237.
2. Inspect the wiring harness and connector for any visible damage, corrosion, or loose connections.
3. Check the O2 sensor for proper operation and resistance.
4. Perform a continuity test on the wiring to ensure there are no open circuits.
5. Verify the signal from the O2 sensor using a multimeter or scan tool.

How to fix DTC P2237 on BMW

To fix DTC P2237 on a BMW, you can try the following solutions:

1. Replace the faulty O2 sensor with a new, OEM part.
2. Repair any damaged wiring or connectors in the circuit.
3. Clean or replace the sensor connector if there is corrosion or poor connection.
4. If the issue persists, consider checking the ECM for any faults or reprogramming.

How to erase DTC P2237 on BMW

To erase DTC P2237 on a BMW after fixing the underlying issue, you can:

1. Use an OBD-II scanner to clear the fault code from the ECM memory.
2. Ensure that the repair has been successful by checking for any recurring codes or symptoms.

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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