P066F – BMW DTC

BMW DTC P066F – Cylinder 3 Glow Plug Control Circuit High

DTC P066F meaning on BMW

The Diagnostic Trouble Code (DTC) P066F for BMW indicates a problem with the Cylinder 3 Glow Plug Control Circuit being detected as high. This means that there is an issue with the control circuit for the glow plug in cylinder 3, which can affect the proper functioning of the glow plug system in the vehicle.

BMW DTC P066F symptoms

Symptoms of the DTC P066F on a BMW may include:

• Engine misfires
• Reduced engine performance
• Difficulty starting the engine, especially in cold weather
• Check Engine Light (CEL) illuminated on the dashboard

BMW DTC P066F causes

Common causes of the DTC P066F on a BMW include:

• Faulty glow plug in cylinder 3
• Wiring issues in the glow plug control circuit
• Defective glow plug control module
• Corrosion or poor connections in the circuit

BMW DTC P066F seriousness

The seriousness of the DTC P066F on a BMW lies in the potential engine performance issues it can cause. Ignoring this fault can lead to further damage to the engine and may result in more costly repairs down the line. It is recommended to address this issue promptly to ensure the proper functioning of the glow plug system.

How to diagnose DTC P066F on BMW

To diagnose the DTC P066F on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes and identify the specific issue.
2. Inspect the glow plug in cylinder 3 for any signs of damage or wear.
3. Check the wiring and connections in the glow plug control circuit for any faults.
4. Test the glow plug control module for proper functionality.

How to fix DTC P066F on BMW

To fix the DTC P066F on a BMW, you can try the following solutions:

1. Replace the faulty glow plug in cylinder 3 with a new one.
2. Repair any damaged wiring or connections in the glow plug control circuit.
3. Replace the defective glow plug control module if necessary.
4. Clear the fault codes and reset the Check Engine Light using a diagnostic scanner.

How to erase DTC P066F on BMW

To erase the DTC P066F on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Follow these steps:

1. Connect the diagnostic scanner to the OBD-II port in the vehicle.
2. Select the option to erase fault codes or clear DTCs on the scanner.
3. Follow the on-screen prompts to complete the process.
4. Once the fault codes are cleared, start the engine and check for any reoccurrence of the DTC P066F.

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.