Network, generic

U067B Lost Communication With Engine Disconnect Clutch Pressure Sensor

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

Parallel hybrids put a clutch between engine and electric motor so the car can drive electrically with the engine stopped. Many close it hydraulically, and a pressure sensor confirms the clamping: in Ford's 10R80 MHT hybrid transmission, as Gears Magazine explains, the auxiliary pump closes the clutch and a pressure sensor watches that supply. Schaeffler's application WO2018233759A1 places a pressure sensor in the clutch actuator's master cylinder next to a travel sensor. If such a sensor reports digitally and its messages stop, U067B is stored. No manufacturer documents this code publicly. Analog faults of the same sensor are P28F1 to P28F5; U02AA concerns the clutch actuator. Engine starts and electric driving may then be restricted.

Likely causes

Wiring or connector of the clutch pressure sensor damaged

Pressure sensor electronics failed

Transmission or hybrid controller input or software fault

Symptoms

Hybrid system warning, electric driving unavailable
Engine runs continuously or starts roughly
Check engine light

Repair estimate

DifficultyHardWorkshop job

Parts and labour€100–1,500

Time1–6 h

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

Parts involved

engine disconnect clutch pressure sensorvehicle bus wiring

References: gearsmagazine.com, patents.google.com, law.cornell.edu.