P274BTransmission Fluid Temperature Sensor C Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- P274B means the sensor C signal is within electrical limits but does not fit the other information, for example because it barely changes while the gearbox warms or contradicts the other temperature values. The only public manufacturer reference is Ford bulletin 20-2044: 2020 Super Duty trucks with the 6.7 L diesel, built up to 5 February 2020, could light the MIL with P274B, often together with P203B and P2201, purely through PCM software; the remedy is reprogramming, about 0.6 h of labour. Ford does not say which measuring point C is. On other vehicles a sensor drifting with age, a high-resistance connection or contaminated fluid are more likely. P274A, P274C and P274D cover outright electrical faults.
- What you may notice
- Malfunction indicator lamp on
- Temperature C stays nearly constant while driving
- Likely causes
- LikelyPCM software (Ford 2020 Super Duty 6.7 L, TSB 20-2044)
- PossibleSensor C drifting or slow to respond
- RareAdded resistance in connector or lead
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.