P0742

Torque Converter Clutch Circuit Stuck On

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$33–167 (est.)

Symptoms

Engine stalls when stopped
Gear shifting problems
Floating engine speed
Increased fuel consumption
Transmission overheating

Causes

Faulty gas turbine blocking solenoid
Damage to the wiring in the control circuit
Mechanical fault of the torque converter
Transmission control module (TCM) problems
Contaminated or low transmission fluid level

How to Fix

Check the level and condition of the transmission fluid
Diagnose the gas turbine engine blocking solenoid
Check the gas turbine engine blocking control circuit for opens and short circuits
Scan the transmission control module for other errors
If necessary, replace the torque converter

Related codes

P0740 P0741 P0743