BMW DTC P1638 – Throttle Valve Position Control Throttle Stuck Temporarily (Bank 1)
DTC P1638 meaning on BMW
DTC P1638 on a BMW indicates an issue with the Throttle Valve Position Control Throttle being stuck temporarily in Bank 1. This means that the throttle valve is not moving as it should, which can affect the engine’s performance and efficiency.
BMW DTC P1638 symptoms
Symptoms of DTC P1638 on a BMW may include:
- Reduced engine power
- Poor acceleration
- Engine stalling
- Check Engine Light illuminated
BMW DTC P1638 causes
The common causes of DTC P1638 on a BMW include:
- Throttle valve sticking due to dirt or debris
- Faulty throttle position sensor
- Wiring or connection issues
BMW DTC P1638 seriousness
DTC P1638 should be taken seriously as it can lead to drivability issues and potential safety concerns. It is recommended to address this issue promptly to avoid further damage to the vehicle.
How to diagnose DTC P1638 on BMW
To diagnose DTC P1638 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the throttle valve for any signs of sticking or obstruction
- Check the throttle position sensor for proper operation
- Inspect the wiring and connections related to the throttle system
How to fix DTC P1638 on BMW
To fix DTC P1638 on a BMW, you can try the following solutions:
- Clean the throttle valve to remove any dirt or debris causing it to stick
- Replace the throttle position sensor if faulty
- Repair any damaged wiring or connections in the throttle system
- Perform a throttle relearn procedure to recalibrate the system
How to erase DTC P1638 on BMW
To erase DTC P1638 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Once the codes are cleared, you can monitor the system for any reoccurrence of the issue.
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.