Powertrain, generic · Transmission

P094D Hydraulic Pump Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The hydraulic or electric oil pump, or its integrated controller, has become too hot. The temperature is usually measured on the controller board and the pump is derated or switched off to protect it. No manufacturer documents this exact code publicly. Hyundai lists the same condition for the high-flow pump of its wet 8-speed DCT as P193D4B, over temperature, and P1C2E92 for the high-pressure pump motor control. Kia recalled stop-start oil pump controllers in 2023 because a damaged capacitor could short and overheat the board, harness and connector. CARB requires functional checks on outputs. P094A is the driver fault, P094B a pump that never stops, a common reason for heat build-up.

Likely causes

Pump running too long because of leakage or a stuck relay
Defective pump controller board
Very hot transmission fluid or blocked cooling

Symptoms

  • Warning light on
  • Stop-start temporarily disabled
  • Burning smell near the pump in severe cases

Repair estimate

DifficultyHardWorkshop job
Parts and labour€200–1,500
Time1–4 h

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

Parts involved

hydraulic pumptcm

Related codes

P094AP094BP094CP094E

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