What are the common causes of U0287?

An open or shorted harness to transmission fluid pump module A. A failed transmission fluid pump module. A blown fuse feeding the module. Low battery voltage during communication. Water or moisture in the module connector.

Check the fuse and power feed for the transmission fluid pump module. Verify the module grounds. Inspect the harness and connector for damage or corrosion. Confirm the module responds on a scan tool. Replace the transmission fluid pump module if power and wiring test good. Clear the code and retest.

U0287

Lost Communication With Transmission Fluid Pump Module A

System: Network communication (U code)
Lamp: Check Engine Light
Category: Network Communications

What it means

U0287 means Lost Communication With Transmission Fluid Pump Module A.

Where it lives

For U0287, start at the pump the description names.

Check these first

An open or shorted harness to transmission fluid pump module A
A failed transmission fluid pump module
A blown fuse feeding the module
Low battery voltage during communication
Water or moisture in the module connector

What to do next

Check the fuse and power feed for the transmission fluid pump module
Verify the module grounds
Inspect the harness and connector for damage or corrosion
Confirm the module responds on a scan tool
Replace the transmission fluid pump module if power and wiring test good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.