Powertrain, generic · Transmission

P0937 Hydraulic Oil Temperature Sensor Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

General electrical fault in the circuit of the temperature sensor for the hydraulic fluid of an automated gearbox, without a clear low or high pattern. No manufacturer documents this exact code publicly. Ferrari shows where such a sensor sits: its DCT carries a radiator outlet and gearbox inlet oil temperature sensor reported under P0938 to P0940 in the NCR gearbox ECU. The control needs this value to correct pressure and clutch fill for viscosity. CARB requires circuit checks on transmission sensors. P0938 is the plausibility fault, P0939 and P0940 low and high, P0941 intermittent; P0711 to P0713 cover the main transmission fluid temperature sensor. Shift quality may suffer and a warning appears.

Likely causes

Connector at the temperature sensor loose, corroded or oil-soaked
Damaged sensor wiring near the gearbox or cooler lines
Temperature sensor failed

Symptoms

  • Gearbox warning light on
  • Rougher shifts or clutch engagement, especially when cold

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–500
Time0.5–2 h

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

Parts involved

hydraulic oil temp sensorwiring harnesstcm

Related codes

P0938P0939P0940P0941P0711P0712P0713

References: law.cornell.edu, static.nhtsa.gov.