BMW DTC P318D – Cylinder 5 H2-Injector Low Side Circuit/Open
DTC P318D meaning on BMW
DTC P318D is a fault code that indicates an issue with the Cylinder 5 H2-Injector Low Side Circuit/Open on a BMW vehicle. This fault code specifically points to a problem with the fuel injector circuit for cylinder 5, indicating that there may be an open circuit or a fault in the injector’s electrical system.
BMW DTC P318D symptoms
Symptoms of DTC P318D on a BMW may include rough idling, misfiring, loss of power, decreased fuel efficiency, and potentially an illuminated check engine light on the dashboard. The vehicle may also experience hesitation or stalling during acceleration.
BMW DTC P318D causes
The causes of DTC P318D on a BMW can vary, but common reasons include a faulty fuel injector, wiring issues in the injector circuit, a poor electrical connection, or a problem with the Engine Control Module (ECM).
BMW DTC P318D seriousness
Ignoring DTC P318D on a BMW can lead to poor engine performance, reduced fuel efficiency, and potential damage to the catalytic converter over time. It is important to address this fault code promptly to prevent further issues and maintain the vehicle’s optimal operation.
How to diagnose DTC P318D on BMW
To diagnose DTC P318D on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the fuel injector for cylinder 5. They would check the wiring harness, connectors, and the injector itself for any signs of damage or malfunction. Additionally, testing the injector’s resistance and checking for proper voltage supply can help pinpoint the issue.
How to fix DTC P318D on BMW
Fixing DTC P318D on a BMW may involve replacing the faulty fuel injector, repairing any damaged wiring or connectors in the circuit, or addressing any issues with the Engine Control Module. It is recommended to follow the manufacturer’s diagnostic and repair procedures to ensure a proper fix and prevent future occurrences of the fault code.
How to erase DTC P318D on BMW
Once the underlying issue causing DTC P318D on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. By accessing the vehicle’s onboard computer system, the fault code can be erased, and the check engine light reset. This will indicate that the problem has been addressed and allow for normal operation of 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.