BMW DTC P27D8 – Pressure Control Solenoid ¿S¿ Control Circuit High
DTC P27D8 meaning on BMW
DTC P27D8 on a BMW refers to the Pressure Control Solenoid ‘S’ Control Circuit High. This diagnostic trouble code indicates that the engine control module (ECM) has detected a high voltage condition in the control circuit of the pressure control solenoid ‘S’ in the transmission.
BMW DTC P27D8 symptoms
Symptoms of DTC P27D8 in a BMW may include harsh shifting, delayed shifting, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a failsafe mode to prevent further damage.
BMW DTC P27D8 causes
The common causes of DTC P27D8 in a BMW include a faulty pressure control solenoid ‘S’, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or a malfunctioning ECM.
BMW DTC P27D8 seriousness
Ignoring DTC P27D8 in a BMW can lead to further transmission damage and potentially leave the vehicle inoperable. It is important to address this issue promptly to prevent more severe problems.
How to diagnose DTC P27D8 on BMW
To diagnose DTC P27D8 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes from the ECM. They would then inspect the pressure control solenoid ‘S’ and its wiring for any visible damage. Testing the solenoid’s resistance and checking the transmission fluid level would also be part of the diagnostic process.
How to fix DTC P27D8 on BMW
Fixing DTC P27D8 on a BMW may involve replacing the pressure control solenoid ‘S’ if it is found to be faulty. Repairing or replacing any damaged wiring or connectors in the circuit is also necessary. Additionally, ensuring the transmission fluid is at the correct level and in good condition is crucial. In some cases, reprogramming or replacing the ECM may be required.
How to erase DTC P27D8 on BMW
Once the underlying issue causing DTC P27D8 on a BMW has been resolved, the fault codes can be cleared using a diagnostic scanner. This will erase the code from the ECM’s memory and turn off the check engine light. It is important to verify that the issue has been fixed before clearing the fault code.
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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