01 What Does It Mean When Your Car Says “Engine Power Reduced”? • 02 What to Do If Your Car Starts and Then Stops • 03 P0102 and P0103: Mass Air Flow (MAF) Sensor Circuit Low & H… • 04 The Silent Sensor That Controls Half Your Engine Without No… • 05 This Is Why Your Car’s Brakes Grind When Stopping • 06 Piston Rings: The Key to a Long and Healthy Engine Life • 07 How the Wrong Oil Viscosity Can Mess With Your Engine's Hea… • 08 U0001 High Speed CAN Communication Bus • 09 Is Expensive Oil Worth It? The Truth About Synthetic vs. Se… • 10 From Lag to Launch: Mastering the Mechanics of Turbocharged… •

DTC codes / P28xx · Transmission / P28CF

P28CFClutch A Pressure Sensor Circuit High

P28CF means the powertrain control module (PCM) has detected a voltage signal from the Clutch A pressure sensor that is higher than the normal operating range. The sensor is responsible for reporting hydraulic pressure in the clutch circuit, and a high signal typically indicates an open circuit, a short to voltage, or a sensor that has failed internally.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage