BMW DTC P185C – Pressure Control Solenoid Control – Unpermitted Engagement of P at Implausible Vehicle Speed Signal
DTC P185C meaning on BMW
DTC P185C on a BMW refers to the Pressure Control Solenoid Control – Unpermitted Engagement of Park at Implausible Vehicle Speed Signal. This diagnostic trouble code indicates that there is an issue with the pressure control solenoid control system in the transmission, specifically related to the engagement of the park position at a speed that is considered implausible based on the vehicle’s current speed signal.
BMW DTC P185C symptoms
Symptoms of DTC P185C on a BMW may include harsh shifting, transmission slipping, difficulty engaging gears, transmission overheating, and in some cases, the transmission may go into a fail-safe mode to prevent further damage.
BMW DTC P185C causes
The common causes of DTC P185C on a BMW include a faulty pressure control solenoid, wiring issues in the transmission control circuit, a malfunctioning transmission control module (TCM), or a problem with the vehicle speed sensor.
BMW DTC P185C seriousness
DTC P185C 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 can leave the vehicle inoperable.
How to diagnose DTC P185C on BMW
To diagnose DTC P185C on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the TCM. They would then inspect the pressure control solenoid, check the wiring for any damage or loose connections, and test the vehicle speed sensor for proper operation.
How to fix DTC P185C on BMW
Fixing DTC P185C on a BMW may involve replacing the faulty pressure control solenoid, repairing any damaged wiring, replacing the transmission control module if necessary, or addressing any issues with the vehicle speed sensor. It is recommended to have a qualified mechanic perform these repairs to ensure proper diagnosis and resolution of the issue.
How to erase DTC P185C on BMW
Once the underlying issue causing DTC P185C on a BMW has been fixed, the fault codes can be cleared using a diagnostic scanner. This will erase the code from the TCM’s memory and reset the transmission control system. It is important to verify that the issue has been resolved before clearing the fault codes to prevent the code from reappearing.
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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