BMW DTC P10D8 – VVL-Relay Control Circuit High (Bank 1)
DTC P10D8 meaning on BMW
The DTC P10D8 on a BMW refers to a fault in the Variable Valve Lift (VVL) system’s relay control circuit on Bank 1. This fault indicates that the control circuit for the VVL system’s relay on Bank 1 is reading a high voltage signal when it should not be.
BMW DTC P10D8 symptoms
Symptoms of the DTC P10D8 on a BMW may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Reduced engine performance
- Engine misfires or rough idling
BMW DTC P10D8 causes
Common causes of the DTC P10D8 on a BMW include:
- Faulty VVL relay on Bank 1
- Wiring or connection issues in the VVL relay control circuit
- ECU (Engine Control Unit) malfunction
BMW DTC P10D8 seriousness
The DTC P10D8 should be addressed promptly as it can lead to reduced engine performance and potential drivability issues. Ignoring this fault may result in further damage to engine components.
How to diagnose DTC P10D8 on BMW
To diagnose the DTC P10D8 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the VVL relay on Bank 1 for any visible damage or signs of malfunction
- Check the wiring and connections in the VVL relay control circuit for any issues
- Perform a continuity test on the relay control circuit to check for proper voltage readings
How to fix DTC P10D8 on BMW
To fix the DTC P10D8 on a BMW, the following steps may be taken:
- Replace the faulty VVL relay on Bank 1
- Repair any damaged wiring or connections in the VVL relay control circuit
- If the ECU is found to be faulty, it may need to be reprogrammed or replaced
How to erase DTC P10D8 on BMW
After the issue causing the DTC P10D8 on a BMW has been resolved, the fault code can be erased using a diagnostic scanner. This will clear the code from the ECU’s memory 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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