P273F code meaning
Transmission Fluid Temperature Sensor B Over Temperature Condition
What P273F means
P273F is a condition code, not a wiring fault: sensor B delivers a valid reading, but that reading lies above the overheating limit the calibration allows. No manufacturer publishes P273F or its threshold. The analogous code for sensor A is P0218; Saab's Aisin automatic, for instance, sets it once the fluid stays above 170 °C for over 10 s. Where sensor B measures the oil leaving the cooler, as on GM and Ford dual-clutch units, a high value hints that the cooler itself is no longer removing heat. Typical reactions are a warning message, reduced torque or an altered shift and clutch strategy. Look for towing or track use, low fluid, a blocked cooler or a failed cooler valve before suspecting the sensor.
P273F at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P273F
- Transmission overheating message
- Reduced torque or changed shift pattern
- Burnt-smelling or darkened fluid
Common causes of P273F
- Most likelySustained high load – towing, track use, long climbs
- PossibleFluid cooler clogged or cooler valve not opening
- PossibleFluid level low or fluid aged
- Less likelySensor B reading too hot while still in range
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Trans fluid temp sensor bTransmission fluidCooler
What each part of P273F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 3F | The exact fault in that area. |
What to do next
- Note P273F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P273F
What does P273F mean?
P273F means "Transmission Fluid Temperature Sensor B Over Temperature Condition". P273F is a condition code, not a wiring fault: sensor B delivers a valid reading, but that reading lies above the overheating limit the calibration allows. It is a generic code, so it means the same on every make.
Is it safe to drive with P273F?
Drive gently and only to a workshop. With P273F the car can go into limp mode (reduced power) to protect itself.
Will P273F fail an emissions test?
P273F is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P273F to fix?
Difficulty: medium. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P273F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.