OBD-II code · Powertrain (generic, extended)
P273F Transmission Fluid Temperature Sensor B Over Temperature Condition
The second transmission fluid temperature sensor reports an over-temperature condition. Transmission fluid is too hot in the area monitored by sensor B.
Is it safe to drive with P273F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRestricted transmission fluid cooler
- PossibleSustained heavy load such as trailer towing
- PossibleLow transmission fluid level
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Trans Fluid Temp Sensor B, Transmission Fluid, Cooler
Related codes
- P274FTransmission Fluid Temperature Sensor C Over Temperature Condition
- P275FTransmission Fluid Temperature Sensor D Over Temperature Condition
- P273CGear Shift Control Module A Supply Voltage Low
- P273DGear Shift Control Module A Supply Voltage High
- P273EGear Shift Control Module A Over Temperature
- P2740Transmission Fluid Temperature Sensor B Circuit
- P2741Transmission Fluid Temperature Sensor B Circuit Range/Performance
- P2742Transmission Fluid Temperature Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.