OBD-II code · Powertrain (generic, extended)

P274A Transmission Fluid Temperature Sensor C Circuit

The third transmission fluid temperature sensor returns no usable signal.

Is it safe to drive with P274A?

Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.

Common causes

  • Most likelyOpen sensor element or broken sensor wire
  • PossibleCorroded sensor connector

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
Best left to a mechanic
Typical labour
0.8–3 h
Emissions test
Usually unaffected
Parts involved
Trans Fluid Temp Sensor C, Wiring Harness

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.