BMW DTC P0971 – Pressure Control Solenoid ‘C’ Control Circuit High
DTC P0971 meaning on BMW
The Diagnostic Trouble Code (DTC) P0971 for BMW refers to an issue with the Pressure Control Solenoid ‘C’ Control Circuit being detected as high. This means that the control circuit for the pressure control solenoid ‘C’ is registering a higher voltage than expected by the Engine Control Module (ECM).
BMW DTC P0971 symptoms
Symptoms of DTC P0971 on a BMW may include harsh shifting, transmission slipping, transmission overheating, decreased fuel efficiency, and in some cases, the transmission may go into a fail-safe or limp mode.
BMW DTC P0971 causes
The common causes of DTC P0971 on a BMW include a faulty pressure control solenoid ‘C’, damaged wiring or connectors in the control circuit, low transmission fluid level, dirty or contaminated transmission fluid, or a malfunctioning ECM.
BMW DTC P0971 seriousness
DTC P0971 should be taken seriously as it can lead to further damage to the transmission if left unresolved. Ignoring this issue may result in costly repairs or even transmission failure, which could leave the vehicle inoperable.
How to diagnose DTC P0971 on BMW
To diagnose DTC P0971 on a BMW, a mechanic would typically start by using a scan tool to retrieve the fault codes from the ECM. They would then inspect the wiring and connectors related to the pressure control solenoid ‘C’, check the transmission fluid level and condition, and perform a thorough visual inspection of the transmission components.
How to fix DTC P0971 on BMW
Fixing DTC P0971 on a BMW may involve replacing the pressure control solenoid ‘C’, repairing or replacing damaged wiring or connectors, ensuring the transmission fluid is at the correct level and in good condition, and resetting the ECM. It is recommended to have this issue addressed by a qualified mechanic to ensure proper diagnosis and repair.
How to erase DTC P0971 on BMW
Once the underlying issue causing DTC P0971 on a BMW has been fixed, the fault codes can be cleared using a scan tool. This will erase the DTC P0971 code from the ECM’s memory and reset the transmission control module. It is important to verify that the issue has been resolved before clearing the 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.