P0742: Torque Converter Clutch Circuit Stuck On

What does P0742 mean?

P0742 is a diagnostic trouble code indicating "Torque Converter Clutch Circuit Stuck On". This code relates to your vehicle's transmission and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Intermittent warning lights
• Erratic gauge readings

Common causes

• Low or degraded transmission fluid
• Worn clutch packs or bands
• Faulty shift solenoid
• Wiring issue to the transmission control module
• Failing torque converter

What should you do?

This is a significant issue that should be diagnosed and repaired soon. Avoid long trips or heavy driving until the problem is resolved. Continued driving may cause additional damage.