BMW DTC P0966 – Pressure Control Solenoid ‘B’ Control Circuit Low
DTC P0966 meaning on BMW
The Diagnostic Trouble Code (DTC) P0966 for BMW refers to the Pressure Control Solenoid ‘B’ Control Circuit Low. This code indicates that the control circuit for the pressure control solenoid ‘B’ is operating at a lower voltage level than expected.
BMW DTC P0966 symptoms
Symptoms of DTC P0966 on a BMW may include harsh shifting, delayed or erratic gear changes, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a fail-safe or limp mode.
BMW DTC P0966 causes
The common causes of DTC P0966 on a BMW include a faulty pressure control solenoid ‘B’, damaged wiring or connectors in the control circuit, low transmission fluid level, or a malfunctioning transmission control module.
BMW DTC P0966 seriousness
Ignoring or neglecting DTC P0966 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.
How to diagnose DTC P0966 on BMW
To diagnose DTC P0966 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the pressure control solenoid ‘B’, check the wiring and connectors for any damage, and test the transmission fluid level and condition.
How to fix DTC P0966 on BMW
Fixing DTC P0966 on a BMW may involve replacing the pressure control solenoid ‘B’, repairing or replacing any damaged wiring or connectors in the control circuit, ensuring the transmission fluid level is correct, and resetting the transmission control module.
How to erase DTC P0966 on BMW
To erase DTC P0966 on a BMW, a mechanic can use a diagnostic scanner to clear the fault code from the vehicle’s memory. Once the issue has been addressed and fixed, clearing the code will reset the system and turn off the Check Engine Light.
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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