Pressure Control Solenoid "K" Control Circuit High
The transmission control module detected excessive voltage in Solenoid K's control circuit, indicating an electrical fault in the transmission pressure control solenoid K. This prevents the solenoid from functioning correctly and causes the transmission to enter limp mode to protect itself from damage.
What You Might Notice
- Check Engine Light activated
- Transmission slips when shifting
- Transmission shifts hard or bangs into gear
- Increased fuel consumption
- Transmission overheating
- Transmission locked in limp mode with limited gears
Most Common Causes
- 1
Solenoid K wiring short to power
The wiring harness connected to Solenoid K has a short circuit causing excessive voltage to reach the solenoid control circuit. This is the most common electrical fault triggering this code.
- 2
Faulty Solenoid K
The solenoid coil itself has failed internally, creating a short or resistance change that causes the control circuit to read high voltage levels.
- 3
Corroded or damaged connector
The solenoid connector or transmission control module connector has corrosion, loose pins, or damage causing improper electrical contact and voltage irregularities.
- 4
Transmission control module (TCM) fault
The TCM itself has failed or is malfunctioning, causing it to misinterpret solenoid K circuit voltage or send incorrect control signals.
How to Diagnose It
- 1
Check Solenoid K wiring short to power — The wiring harness connected to Solenoid K has a short circuit causing excessive voltage to reach the solenoid control circuit. This is the most common electrical fault triggering this code.
- 2
Check Faulty Solenoid K — The solenoid coil itself has failed internally, creating a short or resistance change that causes the control circuit to read high voltage levels.
- 3
Check Corroded or damaged connector — The solenoid connector or transmission control module connector has corrosion, loose pins, or damage causing improper electrical contact and voltage irregularities.
- 4
Check Transmission control module (TCM) fault — The TCM itself has failed or is malfunctioning, causing it to misinterpret solenoid K circuit voltage or send incorrect control signals.
How to Fix It
- 1
Inspect and repair solenoid wiring
Inspect the complete wiring harness from the transmission to the control module for cuts, abrasions, moisture, or short circuits. Repair or replace damaged wiring and reconnect any loose connectors securely.
- 2
Test and replace Solenoid K
Remove and electrically test Solenoid K for proper resistance and operation. If testing shows resistance outside specifications or solenoid does not respond to voltage, replace the solenoid with a new unit.
- 3
Clean or replace connectors
Disconnect and inspect all connectors on Solenoid K and the transmission control module. Clean corrosion with electrical contact cleaner or replace connectors if damage is severe. Ensure all pins seat fully.
- 4
Diagnose or replace TCM
Use a transmission diagnostic scan tool to confirm TCM voltage readings. If wiring and solenoid test good but code persists, the TCM may require reprogramming or replacement by a qualified transmission specialist.
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