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OBD Code U067A

Lost Communication With Transmission Fluid Pressure Sensor/Switch B

CodeU067A
DescriptionLost Communication With Transmission Fluid Pressure Sensor/Switch B
SystemNetwork

What Does U067A Mean?

Lost Communication With Transmission Fluid Pressure Sensor/Switch B. This diagnostic trouble code (DTC) is stored when the vehicle's onboard computer detects an issue with the network.

Code Breakdown

U = Network code

0 = Generic (SAE standard)

How to Fix U067A

Follow these diagnostic steps to identify and resolve the issue. Always start with the simplest checks before moving to more involved repairs.

  1. Check the transmission control module (TCM) connector for corrosion or damage.
  2. Inspect CAN bus wiring between the TCM and ECM.
  3. Check battery voltage and charging system.
  4. Verify the TCM has proper power and ground.
  5. Try clearing codes — if they return, the TCM may need reprogramming or replacement.

Note: These are general diagnostic guidelines. Some vehicles may have model-specific procedures. Always consult your vehicle's service manual for exact specifications and torque values. If you are not comfortable performing these steps, visit a qualified mechanic.

Frequently Asked Questions

Is U067A serious?

Yes — U067A is considered a critical-severity code. You should have it diagnosed and repaired as soon as possible. Driving with this code active may cause further damage to your vehicle or pose a safety risk.

Can I clear U067A myself?

You can clear any OBD-II code with a code scanner or by disconnecting the battery for 15-30 minutes. However, clearing the code without fixing the underlying problem will cause it to return — usually within one or two drive cycles. If the code triggered the check engine light, the light will come back on. Fix the root cause first, then clear the code.

How much does it cost to fix U067A?

Repair costs vary widely depending on the root cause. Some fixes are free (like tightening a gas cap) while others can cost several hundred dollars (like replacing a catalytic converter or oxygen sensor). A proper diagnosis with a professional scan tool — not just reading the code — is the first step to getting an accurate repair estimate. Many auto parts stores offer free code reading, but a thorough diagnosis usually requires a mechanic.

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