P31EE – BMW DTC

BMW DTC P31EE – H2 and High Pressure Injector ECM, Switchover Fuel Mode Circuit (Bank 1)

DTC P31EE meaning on BMW

The DTC P31EE on a BMW refers to a fault with the High Pressure Injector ECM, Switchover Fuel Mode Circuit in Bank 1. This diagnostic trouble code indicates an issue with the fuel injection system in the specified bank of the engine.

BMW DTC P31EE symptoms

Symptoms of the BMW DTC P31EE may include:

• Engine misfires
• Reduced engine performance
• Check Engine Light (MIL) illuminated
• Increased fuel consumption

BMW DTC P31EE causes

Common causes of the BMW DTC P31EE may include:

• Faulty high-pressure injector
• Wiring or connector issues in the fuel injection system
• ECM (Engine Control Module) malfunction
• Fuel delivery problems

BMW DTC P31EE seriousness

The BMW DTC P31EE should be addressed promptly to prevent potential engine damage and ensure optimal performance. Ignoring this fault code may lead to further complications and increased repair costs.

How to diagnose DTC P31EE on BMW

To diagnose the DTC P31EE on a BMW, a comprehensive diagnostic scan using a compatible OBD-II scanner is recommended. The following steps can help in the diagnosis:

1. Retrieve the fault codes and freeze frame data
2. Inspect the high-pressure injector in Bank 1
3. Check the wiring and connectors for any damage or loose connections
4. Test the ECM for proper functionality
5. Perform a fuel pressure test to ensure adequate fuel delivery

How to fix DTC P31EE on BMW

To fix the DTC P31EE on a BMW, the following steps can be taken:

1. Replace the faulty high-pressure injector in Bank 1
2. Repair or replace any damaged wiring or connectors in the fuel injection system
3. If the ECM is faulty, it may need to be reprogrammed or replaced
4. Ensure proper fuel delivery by addressing any fuel system issues

How to erase DTC P31EE on BMW

After addressing and fixing the underlying issue causing the DTC P31EE on a BMW, the fault code can be cleared using an OBD-II scanner. Follow these steps to erase the DTC:

1. Connect the OBD-II scanner to the vehicle’s diagnostic port
2. Navigate to the ¨Clear DTCs¨ or ¨Erase Codes¨ function on the scanner
3. Follow the on-screen prompts to clear the DTC P31EE from the ECM’s memory
4. Verify that the fault code has been successfully erased by rescanning the vehicle

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

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.