Cause
Faulty gear selector switch
The switch behind a manual shift request — the +/− gate on the selector, or the contacts a steering-wheel paddle closes. It is a request input, not the gearbox: when it fails the car still drives and shifts for itself in D, and what dies is the manual override.
Wear shows as selective deafness — some pulls register, some do not, one registers twice. On paddle cars the wiring reaches the wheel through the clock spring, which fails the same way and is the first suspect after any steering-wheel or airbag work.
Typically specialist work. Needs equipment or training most home workshops do not have.
Codes this can cause (8)
Codes where this is a likely explanation first, rather than merely a possible one.
- P2775 Upshift Switch Circuit Range/Performance Likely for this code Low
- P2776 Upshift Switch Circuit Low Likely for this code Low
- P2777 Upshift Switch Circuit High Likely for this code Low
- P2778 Upshift Switch Circuit Intermittent/Erratic Likely for this code Low
- P2779 Downshift Switch Circuit Range/Performance Likely for this code Low
- P2780 Downshift Switch Circuit Low Likely for this code Low
- P2781 Downshift Switch Circuit High Likely for this code Low
- P2782 Downshift Switch Circuit Intermittent/Erratic Likely for this code Low
Information, not instruction
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