P0790

Normal/Performance Switch Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Switching to emergency transmission mode
Limiting the number of available transfers
Check Engine Light Illuminates
Deterioration in acceleration dynamics
Unstable gear shifting

Causes

Open or short circuit in switch circuit
Mode switch malfunction
Wiring Harness Problems
Transmission control module malfunction
Poor contact in connectors

How to Fix

Check the continuity of the switch circuit
Check the condition of connectors and contacts
Test the mode switch
Check the operation of the transmission control module
Replace faulty components

Related codes

P0780 P0791 P0792