P2829 indicates a performance or stuck-off condition in the pressure control solenoid 'K' of the automatic transmission. This solenoid regulates hydraulic pressure for clutch or band application, and the code sets when the transmission control module detects an electrical or mechanical fault preventing proper solenoid operation.
The solenoid itself is the most common cause. Internal wear, electrical failure, or mechanical sticking can prevent it from opening when commanded.
Debris or sludge in the fluid can clog the solenoid or its passages, causing it to stick in the off position.
Open circuits, shorts to ground or power, or corrosion at the solenoid connector can disrupt the electrical signal.
Insufficient fluid level or the wrong fluid type can affect hydraulic pressure and solenoid operation.
A stuck valve in the valve body, worn seals, or other internal damage can mimic a solenoid performance fault.
The control module is rarely the cause. Only consider this after thoroughly testing the solenoid, wiring, and fluid condition.
It is not recommended. The transmission may enter limp mode, limiting speed and gear selection, and continued driving could cause further internal damage.
No, the PCM is rarely the cause. Most often the solenoid itself, wiring, or fluid issues are responsible. Replacing the PCM without proper diagnosis is wasteful and unlikely to resolve the code.
It means the solenoid is not opening when commanded by the transmission control module, preventing hydraulic pressure from reaching the intended circuit and causing performance issues.
Repair costs vary widely depending on the root cause and labor rates. A professional diagnosis is essential to determine the exact issue and avoid unnecessary expenses.