BMW DTC P31E4 – H2 and High Pressure Injector ECM Segment Timing Error (Bank 1)
DTC P31E4 meaning on BMW
DTC P31E4 on a BMW indicates a High Pressure Injector ECM Segment Timing Error in Bank 1. This fault code is related to the timing of the high-pressure fuel injectors in the engine control module (ECM) for the first bank of cylinders.
BMW DTC P31E4 symptoms
Symptoms of DTC P31E4 in a BMW may include rough idling, engine misfires, reduced power output, poor fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P31E4 causes
The High Pressure Injector ECM Segment Timing Error (Bank 1) with code P31E4 in a BMW can be caused by issues such as a faulty high-pressure fuel injector, wiring harness problems, ECM software glitches, or mechanical issues affecting the fuel injection system.
BMW DTC P31E4 seriousness
Ignoring DTC P31E4 in a BMW can lead to drivability issues, reduced engine performance, potential damage to the catalytic converter, and increased emissions. It is recommended to address this fault code promptly to prevent further complications.
How to diagnose DTC P31E4 on BMW
To diagnose DTC P31E4 on a BMW, a mechanic would typically perform a thorough inspection of the high-pressure fuel injectors, check the wiring harness for any faults, scan the ECM for related error codes, and conduct a fuel system pressure test to ensure proper operation.
How to fix DTC P31E4 on BMW
Fixing DTC P31E4 on a BMW may involve replacing the faulty high-pressure fuel injector, repairing any damaged wiring, updating the ECM software if necessary, and performing a system reset to clear the fault code.
How to erase DTC P31E4 on BMW
To erase DTC P31E4 on a BMW, a diagnostic scanner capable of reading and clearing fault codes is required. Once the underlying issue causing the fault code has been addressed, the code can be cleared using the scanner to reset the ECM and turn off 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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