P2849Shift Fork A Stuck
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2849 says that fork A did not travel when the module ordered it to, so its gear could not be put in or taken out. The reading may be valid; the fork itself is not following the command. No manufacturer publishes a strategy for P2849, and the code relies on the CARB 13 CCR 1968.2 rule that transmission components be checked for proper function. GM's 2023 Corvette table shows how a frozen rod is found: an intrusive integrity routine nudges each rod in both directions through its synchronizer valves and expects more than 100 µm of travel. GM, however, charges a rod that never moves to its position sensor and logs it under the first rod's consistency code P2832. Causes range from a seized rod or broken fork to a failed actuator.
- What you may notice
- Gear of fork A will not engage or stays engaged
- Limp-home mode with limited gears
- Clunking or grinding during shift attempts
- Likely causes
- LikelyFork A actuator or its control valve not moving the rod
- PossibleShift rod of fork A seized in its bore or blocked by debris
- RareBroken fork or damaged synchronizer sleeve jamming the shift
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €300 – €4,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.