What are the common causes of P2831?

An open or short in the shift fork A position circuit. A corroded shift fork A position sensor connector. A failed shift fork A position sensor. A shift fork A that binds in its bore.

Read shift fork A position on a scan tool. Command a shift and watch the shift fork A position change. Test the shift fork A position circuit for open and short faults. Check the shift fork A position sensor connector pins. Replace the shift fork A position sensor if the position does not change. Clear the code and retest.

P2831

Shift Fork A Position Circuit

System: Transmission (P code)
Lamp: Check Engine Light
Category: Powertrain - Transmission

What it means

P2831 means Shift Fork A Position Circuit.

Check these first

An open or short in the shift fork A position circuit
A corroded shift fork A position sensor connector
A failed shift fork A position sensor
A shift fork A that binds in its bore

What to do next

Read shift fork A position on a scan tool
Command a shift and watch the shift fork A position change
Test the shift fork A position circuit for open and short faults
Check the shift fork A position sensor connector pins
Replace the shift fork A position sensor if the position does not change
Clear the code and retest

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Updated

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