P2776 code meaning
Upshift Switch Circuit Low
What P2776 means
P2776 means the upshift switch input has dropped below the lowest voltage the module accepts. In GM's 2023 twin-clutch TCM the TAPUP input is supposed to stay above 2.519 V even with the paddle pulled; a lower reading, held for at least 150 ms with battery voltage between 8.75 and 18 V and the engine not cranking, sets P2776 as Type C without MIL. Ford's 2024 TR9070 summary assigns P2776 to the out-of-window-low case of the upshift paddle. A low reading normally means the signal wire is touching ground, for example chafed at the clock spring, or the switch is shorted inside. Compared with P2775 the value is clearly outside the band, and P2777 is the mirror image. Tap upshifts stop working while normal automatic driving continues.
P2776 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2776
- Upshift paddle or tip function inoperative
- Manual mode message, no check engine light on GM
Common causes of P2776
- Most likelySignal wire shorted to ground, e.g. in the clock spring area
- PossiblePaddle switch shorted internally
- Less likelyLiquid in switch or connector creating a leak path to ground
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Upshift switchWiring harness
What each part of P2776 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 76 | The exact fault in that area. |
What to do next
- Note P2776 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2776
What does P2776 mean?
P2776 means "Upshift Switch Circuit Low". P2776 means the upshift switch input has dropped below the lowest voltage the module accepts. It is a generic code, so it means the same on every make.
Is it safe to drive with P2776?
P2776 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2776 fail an emissions test?
P2776 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2776 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2776 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.