BMW DTC P1077 – VVL-Overload Protection Control Motor Temperature High (Bank 1)
DTC P1077 meaning on BMW
The Diagnostic Trouble Code (DTC) P1077 for BMW refers to the VVL-Overload Protection Control Motor Temperature High on Bank 1. This code indicates that there is an issue with the Variable Valve Lift (VVL) system’s overload protection control motor temperature being too high on the bank 1 side of the engine.
BMW DTC P1077 symptoms
Symptoms of the BMW DTC P1077 may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
- Engine running rough or misfiring
- Increased fuel consumption
BMW DTC P1077 causes
Common causes of the BMW DTC P1077 may include:
- Overheating of the VVL overload protection control motor
- Electrical issues in the VVL system
- Faulty VVL-Overload Protection Control Motor
BMW DTC P1077 seriousness
The seriousness of the BMW DTC P1077 code lies in the potential impact on engine performance and efficiency. Ignoring this code can lead to further damage to engine components and may result in costly repairs if not addressed promptly.
How to diagnose DTC P1077 on BMW
To diagnose the DTC P1077 on a BMW, you can perform the following steps:
- Use an OBD-II scanner to retrieve the specific fault code
- Inspect the VVL-Overload Protection Control Motor for any signs of overheating or damage
- Check the electrical connections and wiring related to the VVL system
How to fix DTC P1077 on BMW
To fix the DTC P1077 on a BMW, you may need to:
- Replace the VVL-Overload Protection Control Motor if it is faulty
- Repair any damaged wiring or connections in the VVL system
- Clean or replace the VVL system components if overheating is detected
How to erase DTC P1077 on BMW
To erase the DTC P1077 code on a BMW, you can:
- Use an OBD-II scanner to clear the fault code
- After fixing the underlying issue, reset the Check Engine Light by clearing the code
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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