P2828 indicates that the transmission control module has detected an electrical fault in the pressure control solenoid K circuit, which regulates hydraulic pressure for specific gear shifts. The code is set when the module sees an open, short, or out‑of‑range signal from that solenoid.
The solenoid’s internal coil may be open or shorted, preventing proper hydraulic pressure control.
Corroded, chafed, or loose wires and connectors can interrupt the solenoid driver signal.
Insufficient fluid level or debris in the fluid can impede solenoid operation and trigger the code.
Mechanical wear or internal blockage in the valve body can cause the solenoid to behave erratically.
A damaged output driver inside the TCM may fail to supply the correct voltage to the solenoid.
A loss of data between the PCM and TCM can occasionally set the code, but this is uncommon.
No. The PCM is rarely the cause; most faults are in the solenoid itself, its wiring, or the transmission fluid.
Yes. Insufficient or contaminated fluid can prevent the solenoid from operating correctly and will set the code.
Driving may result in harsh shifts, slipping, or limp‑mode operation; the issue should be diagnosed and repaired promptly to avoid further transmission damage.
Measure its coil resistance with a multimeter and use a scan tool to command the solenoid on and off, confirming that the TCM can drive it properly.