BMW DTC P0975 – Shift Solenoid ‘B’ Control Circuit Range/Performance
DTC P0975 meaning on BMW
The Diagnostic Trouble Code (DTC) P0975 for BMW refers to the Shift Solenoid ‘B’ Control Circuit Range/Performance. This code indicates that there is an issue with the electrical circuit that controls the operation of the Shift Solenoid ‘B’ in the transmission. The Powertrain Control Module (PCM) has detected that the signal from the solenoid is outside the expected range or is not performing as intended.
BMW DTC P0975 symptoms
Symptoms of DTC P0975 on a BMW may include harsh shifting, delayed shifting, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a limp mode where it operates in only one gear.
BMW DTC P0975 causes
The common causes of DTC P0975 on a BMW include a faulty Shift Solenoid ‘B’, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, dirty or contaminated transmission fluid, or a malfunctioning PCM.
BMW DTC P0975 seriousness
Ignoring DTC P0975 on a BMW can lead to further damage to the transmission system, potentially resulting in costly repairs. It is important to address this issue promptly to prevent any long-term damage to the vehicle.
How to diagnose DTC P0975 on BMW
To diagnose DTC P0975 on a BMW, a mechanic would typically start by using a scan tool to retrieve the fault codes stored in the PCM. They would then inspect the Shift Solenoid ‘B’ and its wiring for any visible damage or corrosion. Testing the solenoid’s resistance and checking the transmission fluid level and condition are also common diagnostic steps.
How to fix DTC P0975 on BMW
Fixing DTC P0975 on a BMW may involve replacing the Shift Solenoid ‘B’ if it is found to be faulty. Repairing or replacing any damaged wiring or connectors in the circuit, ensuring the transmission fluid is at the correct level and in good condition, and resetting the PCM may also be necessary to resolve the issue.
How to erase DTC P0975 on BMW
Once the underlying issue causing DTC P0975 on a BMW has been addressed and fixed, the fault codes can be cleared using a scan tool. This will reset the PCM and turn off the Check Engine Light. 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
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