BMW DTC P27C0 – Pressure Control Solenoid ¿N¿ Control Circuit High
DTC P27C0 meaning on BMW
The DTC P27C0 code on a BMW indicates an issue with the Pressure Control Solenoid N control circuit being detected as high. This means that the signal voltage from the pressure control solenoid N to the engine control module (ECM) is higher than the specified range, leading to a malfunction in the transmission control system.
BMW DTC P27C0 symptoms
Symptoms of the BMW DTC P27C0 code 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 a single gear only.
BMW DTC P27C0 causes
The common causes of the DTC P27C0 code on a BMW include a faulty pressure control solenoid N, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, contaminated transmission fluid, or a malfunctioning ECM.
BMW DTC P27C0 seriousness
Ignoring the DTC P27C0 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 to the vehicle.
How to diagnose DTC P27C0 on BMW
To diagnose the DTC P27C0 code on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the ECM. They would then inspect the pressure control solenoid N and its wiring for any visible damage or corrosion. Testing the solenoid’s resistance and checking the transmission fluid level and condition may also be necessary.
How to fix DTC P27C0 on BMW
Fixing the DTC P27C0 code on a BMW may involve replacing the pressure control solenoid N if it is found to be faulty. Checking and repairing any damaged wiring or connectors in the solenoid circuit, ensuring the transmission fluid level is correct, and performing a transmission fluid flush and filter replacement can also help resolve the issue.
How to erase DTC P27C0 on BMW
After the underlying issue causing the DTC P27C0 code on a BMW has been fixed, the code can be erased using a diagnostic scanner. This will clear the code from the ECM’s memory and turn off the check engine light. It is important to ensure that the repair has been successful before clearing the code to prevent it from reoccurring.
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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