BMW DTC P1629 – Throttle Valve Actuator Spring Test Stop, Spring does not Open (Bank 1)
DTC P1629 meaning on BMW
DTC P1629 on a BMW indicates an issue with the Throttle Valve Actuator Spring Test Stop, where the spring does not open as expected in Bank 1. This fault code is specific to the throttle valve actuator system and can lead to performance issues if not addressed promptly.
BMW DTC P1629 symptoms
Symptoms of DTC P1629 on a BMW may include:
- Reduced engine power
- Engine stalling
- Difficulty accelerating
- Check Engine Light illuminated
BMW DTC P1629 causes
Common causes of DTC P1629 on a BMW include:
- Defective throttle valve actuator spring
- Wiring issues in the throttle valve actuator circuit
- Faulty throttle valve actuator motor
BMW DTC P1629 seriousness
The seriousness of DTC P1629 on a BMW lies in its potential to cause drivability issues and affect the overall performance of the vehicle. Ignoring this fault code can lead to further damage and should be addressed promptly.
How to diagnose DTC P1629 on BMW
To diagnose DTC P1629 on a BMW, a mechanic would typically:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the throttle valve actuator and its components for any visible damage
- Check the wiring and connectors in the throttle valve actuator circuit
- Perform a thorough inspection of the throttle system for any abnormalities
How to fix DTC P1629 on BMW
To fix DTC P1629 on a BMW, the following steps may be taken:
- Replace the defective throttle valve actuator spring
- Repair any damaged wiring or connectors in the throttle valve actuator circuit
- If necessary, replace the throttle valve actuator motor
- Clear the fault code and perform a test drive to ensure the issue is resolved
How to erase DTC P1629 on BMW
To erase DTC P1629 on a BMW, a mechanic can:
- Use a diagnostic scanner to clear the fault code
- Perform a test drive to confirm that the fault code does not return
- If the issue persists, further diagnosis and repairs may be necessary
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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