BMW DTC P1055 – VVL-Control Motor Supply Voltage Circuit High (Bank 1)
DTC P1055 meaning on BMW
DTC P1055 for BMW refers to the VVL-Control Motor Supply Voltage Circuit High on Bank 1. This diagnostic trouble code indicates that there is a high voltage condition detected in the Variable Valve Lift (VVL) control motor supply circuit for the bank 1 of the engine.
BMW DTC P1055 symptoms
Symptoms of DTC P1055 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
- Engine misfires
- Rough idling or stalling
BMW DTC P1055 causes
The common causes of DTC P1055 on a BMW include:
- Faulty VVL control motor
- Short circuit or open circuit in the VVL control motor supply wiring
- Faulty engine control module (ECM)
- Intermittent electrical connection issues
BMW DTC P1055 seriousness
DTC P1055 should not be ignored as it can lead to engine performance issues and potential damage if left unresolved. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P1055 on BMW
To diagnose DTC P1055 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the VVL control motor and its wiring for any visible damage or loose connections
- Perform a voltage test on the VVL control motor supply circuit to check for high voltage readings
- Check the ECM for any signs of malfunction
How to fix DTC P1055 on BMW
To fix DTC P1055 on a BMW, you can try the following solutions:
- Replace the faulty VVL control motor
- Repair any damaged wiring in the VVL control motor supply circuit
- Reset the ECM and clear the fault codes
- Perform a test drive to ensure the issue has been resolved
How to erase DTC P1055 on BMW
To erase DTC P1055 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM memory. Once the codes are cleared, you can reset the Check Engine Light and monitor the vehicle for any recurring issues.
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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