What it means
The control module detects a voltage above the expected range in the pressure control solenoid K control circuit. Possible causes include a short to voltage or an open solenoid or wiring circuit.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Pressure control solenoid K is operated by a control circuit that the TCM monitors while regulating transmission pressure. This code means the circuit voltage is above the expected range, which can occur if the control wire is shorted to battery voltage or the solenoid coil is open. Corroded connector contacts can also interfere with the circuit.
Common causes
Most likely first.
- Control wire shorted to B+
- Open solenoid coil
- Connector pins corroded - high contact resistance
Symptoms
- Check-engine or transmission warning light
- Harsh or delayed shifts
- Transmission may slip or hesitate
- Transmission may enter limp mode
How to diagnose it
- Read transmission codes and freeze-frame data, then check live data for the solenoid K command and circuit status when the high-voltage fault occurs.
- Inspect the solenoid K connector and harness for corrosion, loose terminals, damaged insulation, or a wire contacting a power source.
- Use the wiring diagram and manufacturer’s procedure to check whether the control wire is shorted to battery voltage.
- Test the solenoid K coil for an open circuit and inspect connector contacts using the manufacturer’s electrical procedure and specifications.
- If the wiring and coil pass, follow the manufacturer’s procedure to check the TCM output and connector.
Common fixes
- Clean or repair corroded or loose solenoid K connector terminals.
- Repair wiring shorted to battery voltage or damaged near a power source.
- Replace solenoid K if its coil is open according to the prescribed test.
- Repair the TCM output circuit if testing confirms the fault is there.
Can I keep driving?
Avoid towing and hard acceleration because the high circuit reading can prevent solenoid K from regulating pressure, causing harsh shifts, slipping, or limp mode. Stop if the transmission loses drive or slips badly.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.