BMW DTC P1635 – Throttle Valve Adaptation Lower Mechanical Stop not Adapted (Bank 1)
DTC P1635 meaning on BMW
DTC P1635 on a BMW indicates that the Throttle Valve Adaptation Lower Mechanical Stop is not adapted in Bank 1. This means that the throttle valve adaptation values are out of range or not within the specified parameters set by the vehicle’s engine control module (ECM).
BMW DTC P1635 symptoms
Symptoms of DTC P1635 on a BMW may include:
- Reduced engine power
- Engine stalling
- Difficulty accelerating
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P1635 causes
The common causes of DTC P1635 on a BMW include:
- Throttle valve adaptation values out of range
- Throttle valve mechanical stop not properly adjusted
- Faulty throttle valve actuator
- Wiring or connection issues related to the throttle valve system
BMW DTC P1635 seriousness
DTC P1635 should be addressed promptly as it can lead to drivability issues and potential engine damage if left unresolved. Ignoring this fault may result in unsafe driving conditions and further complications with the vehicle’s performance.
How to diagnose DTC P1635 on BMW
To diagnose DTC P1635 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the throttle valve system for any visible damage or misalignment.
- Check the wiring and connections related to the throttle valve actuator.
- Perform a throttle valve adaptation reset using a diagnostic tool to see if the fault clears.
How to fix DTC P1635 on BMW
To fix DTC P1635 on a BMW, you can try the following solutions:
- Adjust the throttle valve mechanical stop to ensure it is within the correct range.
- Reset the throttle valve adaptation values using a diagnostic scanner.
- Replace the throttle valve actuator if it is found to be faulty.
- Repair any wiring or connection issues related to the throttle valve system.
How to erase DTC P1635 on BMW
To erase DTC P1635 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. Once the issue has been addressed and fixed, you can reset the codes to turn off the Check Engine Light and ensure that the fault does not reoccur.
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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