BMW DTC P1634 – Throttle Valve Adaptation Spring Test Failed (Bank 1)
DTC P1634 meaning on BMW
DTC P1634 on a BMW indicates that the Throttle Valve Adaptation Spring Test has failed in Bank 1. This means that there is an issue with the throttle valve adaptation system in the engine, specifically on the first bank of cylinders.
BMW DTC P1634 symptoms
Symptoms of DTC P1634 on a BMW may include rough idling, poor acceleration, reduced engine performance, and potentially stalling. The vehicle may also experience a decrease in fuel efficiency.
BMW DTC P1634 causes
The most common causes of DTC P1634 on a BMW include a faulty throttle valve, a malfunctioning throttle position sensor, wiring issues, or a problem with the engine control module (ECM).
BMW DTC P1634 seriousness
DTC P1634 should be addressed promptly as it can lead to drivability issues and potential engine damage if left unresolved. Ignoring this fault code may result in further complications and increased repair costs.
How to diagnose DTC P1634 on BMW
To diagnose DTC P1634 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the throttle valve, throttle position sensor, wiring connections, and ECM. Testing the components and conducting a visual inspection can help pinpoint the exact cause of the issue.
How to fix DTC P1634 on BMW
Fixing DTC P1634 on a BMW may involve replacing the faulty throttle valve, repairing or replacing the throttle position sensor, addressing any wiring issues, or reprogramming the ECM. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts for a reliable fix.
How to erase DTC P1634 on BMW
To erase DTC P1634 on a BMW, a diagnostic scanner can be used to clear the fault code from the ECM’s memory. After the repair has been completed, the code can be erased to reset the system and ensure that the issue has been resolved. It is important to verify that the repair was successful by performing a test drive and monitoring for any recurring fault codes.
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.