U067A code meaning
Lost Communication With Transmission Fluid Pressure Sensor/Switch B
Network system Generic code U06xx codes Check engine light
What U067A means
Sensor B is the second pressure measuring point. In GM's CVT table 25OBDG03A it reads the secondary pulley, whose pressure sets the clamping force on the belt; its plausibility check runs only above 1,200 rpm with line pressure over 1,000 kPa and a secondary command above 500 kPa. In GM's 24OBDG07 B belongs to clutch 2, fed from its own reference VREF2, and Ford's 2024 summary checks TFP B with P0846 to P0848. U067A stands for a digital sensor B whose messages have stopped. No manufacturer documents this code publicly. With the clamping or clutch pressure unknown, the controller has to work with assumed values, which can mean firmer shifts, limited torque or a fixed gear. If A is still readable, the fault sits in B's own branch.
U067A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U067A
- Firm shifts or engagement
- Reduced engine torque, limp mode
- Warning light on
Common causes of U067A
- Most likelyInternal wiring to sensor B damaged
- PossiblePressure sensor B failed
- PossibleSeparate sensor supply for B faulty
- Less likelyTransmission controller fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission fluid pressure sensor bVehicle bus wiring
What each part of U067A means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7A | The exact fault in that area. |
What to do next
- Note U067A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U067A
What does U067A mean?
U067A means "Lost Communication With Transmission Fluid Pressure Sensor/Switch B". Sensor B is the second pressure measuring point. It is a generic code, so it means the same on every make.
Is it safe to drive with U067A?
Drive gently and only to a workshop. With U067A the car can go into limp mode (reduced power) to protect itself.
Will U067A fail an emissions test?
Yes, it can. U067A is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U067A to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will U067A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.