BMW DTC P274B – Transmission Fluid Temperature Sensor ‘C’ Circuit Range/Performance
DTC P274B meaning on BMW
The Diagnostic Trouble Code (DTC) P274B for BMW refers to the Transmission Fluid Temperature Sensor ‘C’ Circuit Range/Performance issue. This code indicates that there is a problem with the transmission fluid temperature sensor or its circuitry in the vehicle’s transmission system.
BMW DTC P274B symptoms
Symptoms of the BMW DTC P274B may include:
- Check Engine Light illuminated on the dashboard
- Transmission shifting issues
- Reduced fuel efficiency
- Transmission overheating
BMW DTC P274B causes
Common causes of the BMW DTC P274B may include:
- Faulty transmission fluid temperature sensor
- Wiring or connector issues in the sensor circuit
- Low transmission fluid level
- Internal transmission problems
BMW DTC P274B seriousness
The seriousness of the BMW DTC P274B code lies in the potential transmission issues it can cause if left unresolved. Ignoring this code can lead to further damage to the transmission system and potentially result in costly repairs.
How to diagnose DTC P274B on BMW
To diagnose the DTC P274B on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the transmission fluid temperature sensor and its wiring for any visible damage
- Check the transmission fluid level and condition
- Perform a thorough inspection of the transmission system for any other related issues
How to fix DTC P274B on BMW
To fix the DTC P274B on a BMW, the following steps may be taken:
- Replace the faulty transmission fluid temperature sensor
- Repair or replace any damaged wiring or connectors in the sensor circuit
- Ensure the transmission fluid level is at the correct level and in good condition
- Address any other underlying transmission issues that may have triggered the code
How to erase DTC P274B on BMW
To erase the DTC P274B on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the codes can be reset to see if the issue has been resolved. It is important to ensure that the root cause of the problem has been addressed before clearing the codes.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.