BMW DTC P31CE – Cylinder 8 H2-Injector or High Pressure Injector High Side Circuit Low
DTC P31CE meaning on BMW
The DTC P31CE error code on a BMW indicates an issue with the Cylinder 8 H2-Injector or High Pressure Injector High Side Circuit being detected as low. This means that there is a problem with the fuel injector or its high-pressure circuit in the eighth cylinder of the engine.
BMW DTC P31CE symptoms
Symptoms of the BMW DTC P31CE code may include rough idling, engine misfires, decreased fuel efficiency, loss of power, and potentially an illuminated check engine light on the dashboard.
BMW DTC P31CE causes
The causes of the BMW DTC P31CE code can vary and may include issues such as a faulty fuel injector, a clogged fuel injector, wiring or connector problems in the high-pressure circuit, or issues with the engine control module.
BMW DTC P31CE seriousness
Ignoring the DTC P31CE code on a BMW can lead to poor engine performance, reduced fuel efficiency, potential engine damage, and may result in the vehicle failing an emissions test. It is important to address this issue promptly.
How to diagnose DTC P31CE on BMW
To diagnose the DTC P31CE on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s engine control module. They would then perform a visual inspection of the fuel injector and its wiring, conduct tests on the high-pressure circuit, and check for any related issues.
How to fix DTC P31CE on BMW
Fixing the DTC P31CE on a BMW may involve replacing the faulty fuel injector, cleaning a clogged injector, repairing any wiring or connector issues in the high-pressure circuit, or addressing any problems with the engine control module. It is recommended to follow the manufacturer’s repair procedures and use quality replacement parts.
How to erase DTC P31CE on BMW
Once the underlying issue causing the DTC P31CE on a BMW has been fixed, the error code can be erased using a diagnostic scanner. The scanner can clear the fault codes stored in the engine control module, resetting the check engine light and allowing the vehicle to operate normally again.
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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