Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks the part that helps the engine and wheels work together is stuck on, making the car feel weird when you drive.
The P0742 code indicates that the torque converter clutch (TCC) is not disengaging as it should, causing the engine to stay connected to the transmission when it shouldn't be.
The torque converter clutch is designed to lock the engine to the transmission to improve efficiency at highway speeds. When the TCC is stuck on, it means the clutch is not releasing, which can cause stalling or poor performance at lower speeds.
• Engine stalling when coming to a stop
• Poor fuel economy
• Transmission overheating
• Faulty torque converter clutch solenoid
• Wiring issues in the TCC circuit
• Hydraulic blockages in the transmission
Torque Converter: A device that transfers rotating power from the engine to the transmission.
Solenoid: An electromechanical device used to control the flow of fluid or electricity.
• Check for other transmission-related codes
• Inspect the TCC solenoid and wiring
• Perform a transmission fluid pressure test
• Replace the TCC solenoid
• Repair or replace damaged wiring
• Flush the transmission fluid
• OBD-II scanner
• Multimeter
• Transmission fluid pressure gauge
$200 - $800
Moderate
• Honda Accord
• Toyota Camry
• Ford F-150
• Regular transmission fluid changes
• Avoiding excessive towing
• Monitoring transmission temperatures
Transmission Performance
• Avoid driving at high speeds until repaired
• Get the issue diagnosed by a professional
• Monitor for worsening symptoms
Check if the vehicle's powertrain warranty covers transmission issues.
This code has been common in vehicles with high mileage or those that frequently tow heavy loads.
Moderate – Address the issue soon to prevent further transmission damage.
Ignoring this issue can lead to unsafe driving conditions and potential legal liabilities if the vehicle stalls unexpectedly.
• Vehicle at operating temperature
• Driving at highway speeds
The torque converter clutch solenoid is located inside the transmission, often accessible by removing the transmission pan.
Q: Can I drive with a P0742 code?
A: It's not recommended, as it can cause stalling and further transmission damage.
Q: How is a torque converter clutch solenoid tested?
A: A multimeter can be used to check the solenoid's resistance and continuity.
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