BMW DTC P31D5 – Cylinder 11 H2-Injector or High Pressure Injector High Side Circuit High
DTC P31D5 meaning on BMW
The DTC P31D5 code on a BMW indicates an issue with the Cylinder 11 H2-Injector or High Pressure Injector High Side Circuit High. This means that there is a high voltage condition detected in the high side circuit of the injector for cylinder 11 in the engine.
BMW DTC P31D5 symptoms
Symptoms of the DTC P31D5 code on a BMW may include rough idling, engine misfires, loss of power, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P31D5 causes
The common causes of the DTC P31D5 code on a BMW include a faulty high-pressure fuel injector, wiring issues in the high side circuit, a malfunctioning Engine Control Module (ECM), or a problem with the fuel injection system.
BMW DTC P31D5 seriousness
Ignoring the DTC P31D5 code on a BMW can lead to poor engine performance, potential damage to the catalytic converter, and increased emissions. It is important to address this issue promptly to prevent further complications.
How to diagnose DTC P31D5 on BMW
To diagnose the DTC P31D5 code on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the ECM. They would then perform a visual inspection of the high-pressure injector and its wiring, conduct tests on the injector, and check for any other related issues in the fuel system.
How to fix DTC P31D5 on BMW
Fixing the DTC P31D5 code on a BMW may involve replacing the faulty high-pressure injector, repairing any damaged wiring in the high side circuit, resetting the ECM, or addressing any other underlying issues in the fuel injection system. It is recommended to have the repairs done by a qualified mechanic to ensure proper resolution.
How to erase DTC P31D5 on BMW
Once the underlying issue causing the DTC P31D5 code on a BMW has been fixed, the code can be erased using a diagnostic scanner. The mechanic can clear the fault codes stored in the ECM, and after driving the vehicle to ensure the issue does not reoccur, the Check Engine Light should reset on its own.
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.