Powertrain, generic (extended)

P275D Transmission Fluid Temperature Sensor D Circuit High

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

P275D is stored when the sensor D signal rises past the top of its window. With a thermistor on a pull-up resistor the voltage climbs towards the supply when current can no longer flow, so an interrupted lead, a pushed-back terminal or an unplugged connector is the usual explanation, followed by a short to a voltage source. No manufacturer publishes P275D with limits; for the main sensor GM's 2024 dual-clutch TCM uses more than 4745 mV over 500 ms, and Ford's 2012 strategy more than 4.6 V. A quick check is to measure the resistance from the module side or to bridge the connector briefly with a suitable resistor. Until repaired, the gearbox may treat the oil as cold.

Likely causes

Interrupted lead or pushed-back terminal at sensor D
Sensor D open internally
Signal lead shorted to a voltage source

Symptoms

  • Warning lamp
  • Temperature D shows an extremely cold value

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

trans fluid temp sensor dwiring harness

Related codes

P275AP275BP275CP275EP0713

References: law.cornell.edu, gsi.ext.gm.com, newtonnet.co.uk.