Upshift Switch Circuit High

Where it lives

For P2777, the switch sits on the circuit this code reports. The description of P2777 reports a fault at the switch.

Check these first

• A short to voltage in the upshift switch circuit
• An open return in the upshift switch circuit
• A failed upshift switch
• A failed 4WD or transmission control module

What to do next

1. Read the upshift switch status on a scan tool
2. Test the upshift switch circuit for a short to voltage
3. Test the upshift switch circuit for an open return
4. Check the upshift switch connector pins
5. Replace the upshift switch if the circuit tests good
6. Clear the code and retest

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