BMW DTC P27B8 – Pressure Control Solenoid ¿M¿ Control Circuit High
DTC P27B8 meaning on BMW
The DTC P27B8 code on a BMW indicates an issue with the Pressure Control Solenoid ‘M’ Control Circuit being too high. This means that the signal voltage in the control circuit for the pressure control solenoid ‘M’ is registering above the expected range.
BMW DTC P27B8 symptoms
Symptoms of the DTC P27B8 code on a BMW may include harsh shifting, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a fail-safe mode to prevent further damage.
BMW DTC P27B8 causes
The common causes of the DTC P27B8 code on a BMW include a faulty pressure control solenoid ‘M’, damaged wiring or connectors in the control circuit, low transmission fluid level, or a malfunctioning transmission control module.
BMW DTC P27B8 seriousness
Ignoring the DTC P27B8 code 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 P27B8 on BMW
To diagnose the DTC P27B8 code on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes from the vehicle’s computer. They would then inspect the pressure control solenoid ‘M’, check the wiring and connectors for any damage, and ensure the transmission fluid level is adequate.
How to fix DTC P27B8 on BMW
Fixing the DTC P27B8 code on a BMW may involve replacing the pressure control solenoid ‘M’ if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the control circuit, ensuring the transmission fluid level is correct, and resetting the transmission control module may be necessary.
How to erase DTC P27B8 on BMW
To erase the DTC P27B8 code on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. Once the issue has been addressed and fixed, clearing the codes 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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