Powertrain
generic / SAE
P274B
Transmission Fluid Temperature Sensor C Circuit Range/Performance
The third transmission fluid temperature sensor reading is implausible. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / 4B
Possible causes
- Sensor drift after thermal aging medium
- Sensor not seated properly in the fluid path medium
- Sensor element aged beyond calibration window low
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–800 €
- Estimated time: 0.8–3 h
- Component: trans fluid temp sensor c
- MIL / check engine light
Sources
References
sae:J2012