Powertrain, generic · Transmission

P0941 Hydraulic Oil Temperature Sensor Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

The hydraulic oil temperature signal jumps or drops out briefly, too short or irregular for a lasting low or high fault. Since fluid temperature changes slowly, a sudden step is a clear sign of an electrical problem rather than a real temperature change. No manufacturer documents this code publicly. Ferrari's DCT bulletin shows the related sensor at the radiator outlet and gearbox inlet, with its steady faults under P0938 to P0940. CARB requires circuit checks on transmission sensors. P0937 is the general circuit fault, P0938 plausibility, P0939 and P0940 low and high. For the driver this means a warning that may come and go and shift quality that changes from one moment to the next.

Likely causes

Loose contact at the sensor connector under vibration or heat
Chafed wiring near hot gearbox or cooler parts
Sensor with an intermittent internal fault

Symptoms

  • Warning light comes and goes
  • Shift quality varies unpredictably

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–500
Time0.5–2.5 h

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

Parts involved

hydraulic oil temp sensorwiring harnesstcm

Related codes

P0937P0938P0939P0940

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