BMW DTC P0622 – Generator Field/F Terminal Circuit
DTC P0622 meaning on BMW
The Diagnostic Trouble Code (DTC) P0622 for BMW refers to an issue with the Generator Field/F Terminal Circuit. This code indicates a problem with the control circuit for the generator field or F terminal, which is responsible for regulating the output of the alternator.
BMW DTC P0622 symptoms
Symptoms of DTC P0622 on a BMW may include:
- Dim or flickering lights
- Battery warning light on the dashboard
- Electrical system malfunctions
- Difficulty starting the vehicle
BMW DTC P0622 causes
Common causes of DTC P0622 on a BMW include:
- Faulty alternator
- Defective generator field control module
- Wiring issues or poor connections in the generator field circuit
BMW DTC P0622 seriousness
Ignoring DTC P0622 on a BMW can lead to potential issues such as:
- Dead battery
- Electrical system failure
- Stalling or inability to start the vehicle
How to diagnose DTC P0622 on BMW
To diagnose DTC P0622 on a BMW, you can:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the generator field control module and wiring for any visible damage
- Test the alternator and generator field circuit for proper operation
How to fix DTC P0622 on BMW
To fix DTC P0622 on a BMW, you may need to:
- Replace the alternator if it is faulty
- Repair or replace the generator field control module
- Repair any damaged wiring or connections in the generator field circuit
How to erase DTC P0622 on BMW
To erase DTC P0622 on a BMW, you can:
- Use a diagnostic scanner to clear the fault code
- After fixing the underlying issue, reset the fault code to see if it reoccurs
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.