P1864
Torque Converter Clutch Enable Solenoid Electrical Fault Conditions
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Increased fuel consumption
- Gear shifting problems
- Check Engine Light Is On
- The car goes into emergency automatic transmission mode
- Vibration when driving at constant speed
Causes
- Engine blocking solenoid malfunction
- Open or short circuit in solenoid circuit
- Poor contact in solenoid connectors
- Transmission control module (TCM) malfunction
- Low or contaminated transmission fluid
How to Fix
- Check the level and condition of the transmission fluid
- Check the integrity of the solenoid wiring and connectors
- Test the resistance of the gas turbine engine blocking solenoid
- If necessary, replace the gas turbine blocking solenoid
- Check and, if necessary, replace the transmission control module