P07A2 — Transmission Friction Element A Performance/Stuck Off
Friction element A does not lock up when commanded — its hydraulic circuit cannot bring the clutch pack into full engagement. Either the apply piston is stuck, the seal is leaking past the piston, or the supplying pressure regulator is failing.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Clutch pack a
- Apply piston
- Apply seal
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Leaking apply seal
- Stuck apply piston
- Carbon or debris buildup preventing free movement
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.