BMW DTC P274C – Transmission Fluid Temperature Sensor ‘C’ Circuit Low
DTC P274C meaning on BMW
DTC P274C on a BMW refers to a fault with the Transmission Fluid Temperature Sensor ‘C’ circuit. This diagnostic trouble code indicates that the signal from the transmission fluid temperature sensor ‘C’ is reading lower than the expected range.
BMW DTC P274C symptoms
Symptoms of DTC P274C on a BMW may include:
- Check Engine Light illuminated
- Transmission shifting issues
- Reduced fuel efficiency
- Transmission overheating
BMW DTC P274C causes
Common causes of DTC P274C on a BMW include:
- Defective transmission fluid temperature sensor ‘C’
- Wiring or connector issues in the sensor circuit
- Faulty engine control module (ECM)
BMW DTC P274C seriousness
DTC P274C should not be ignored as it can lead to potential transmission problems and reduced drivability. It is important to address this issue promptly to prevent further damage to the transmission system.
How to diagnose DTC P274C on BMW
To diagnose DTC P274C on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the transmission fluid temperature sensor ‘C’ and its wiring for any visible damage
- Test the sensor’s resistance and voltage readings to determine if it is functioning correctly
- Check the ECM for any stored codes related to the sensor circuit
How to fix DTC P274C on BMW
To fix DTC P274C on a BMW, the following steps may be taken:
- Replace the transmission fluid temperature sensor ‘C’ if it is found to be faulty
- Repair any damaged wiring or connectors in the sensor circuit
- If the ECM is determined to be at fault, it may need to be reprogrammed or replaced
How to erase DTC P274C on BMW
After the issue causing DTC P274C on a BMW has been resolved, the fault code can be erased using a diagnostic scanner. This will clear the Check Engine Light and reset the system for normal operation.
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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