Downshift Switch Circuit Low

Possible causes

• CommonFailed or worn switch
• CommonWiring or connector fault
• CommonCorroded connector - underbody switches take road spray and salt
• PossibleSwitch out of adjustment or its linkage worn
• PossibleDamaged clock spring, on steering-wheel-mounted controls

What you might notice

• Manual downshift requests ignored
• Manual mode unavailable
• Transmission changing gear unexpectedly in manual mode
• Check engine light on

What to check, in order

1. Watch the switch state on the live data screen while operating the paddle or lever.
2. Check whether the other direction still works. One direction failing points at that switch; both failing points at shared wiring or the clock spring.
3. On steering-wheel paddles, check for horn or airbag faults alongside, which confirm a clock spring problem.
4. Inspect a console switch for spilled drink, which is the most common cause of a stuck console switch.
5. Confirm automatic shifting is unaffected, in which case this can wait.