P274F means sensor C reports a plausible value that is nevertheless above the overheat limit set in the calibration. It is a condition report rather than a circuit defect, and no manufacturer documents its threshold or the location of sensor C publicly. For the main sensor the equivalent is P0218, which Saab's Aisin gearbox stores at over 170 °C held longer than 10 s. Depending on where C measures – for example at a clutch pack or in a cooler line – the trigger may be a heavily loaded clutch or a restricted oil flow rather than overall sump heat. Expect protective measures such as torque limits or a changed shift pattern; let the unit cool, then check fluid level, condition and the cooling circuit.
Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
Symptoms
- Overheating warning
- Limited torque or altered shifting
Most likely causes
- High load or heavy clutch slip
- Restricted oil flow or clogged cooler
- Low or worn-out fluid
- Sensor C reading too hot within range
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It can trigger limp mode.
What each character of P274F means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 7: Transmission
- 4F: Specific fault in that system
Frequently asked questions
Can I keep driving with code P274F?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P274F?
The most common causes are: high load or heavy clutch slip; restricted oil flow or clogged cooler; low or worn-out fluid.
Related codes
- P274ATransmission Fluid Temperature Sensor C Circuit
- P274BTransmission Fluid Temperature Sensor C Circuit Range/Performance
- P274CTransmission Fluid Temperature Sensor C Circuit Low
- P0218Transmission Fluid Temperature Sensor A Over Temperature Condition
- P273FTransmission Fluid Temperature Sensor B Over Temperature Condition
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.