⚡ AUTO CODE FIX
🔍
TransmissionCritical⚠️ Professional Recommended

P0742

Torque Converter Clutch Stuck On

The TCC is locked when it should not be. This causes stalling when coming to a stop.

SeverityCritical
CategoryTransmission
Est. Repair Cost$500–$3000
Code TypePowertrain
DIY RepairProfessional

⚡ Common Causes

⚠️ Symptoms

✅ How to Fix — Step by Step

  • Step 1:Test TCC solenoid — verify it releases
  • Step 2:Inspect valve body
  • Step 3:Replace torque converter
  • Step 4:Rebuild transmission
💡 Pro Tip: A TCC stuck on causes engine stall at every stop — this is a serious driveability issue requiring immediate repair.

Repair Cost Estimate

Full Repair Estimate
$500–$3000
DIY Possible?
PRO
Severity
Critical

Frequently Asked Questions

What does OBD2 code P0742 mean?+
P0742 stands for Torque Converter Clutch Stuck On. The TCC is locked when it should not be. This causes stalling when coming to a stop.
What causes code P0742?+
TCC solenoid stuck on; Valve body fault locking TCC hydraulically; Mechanical failure inside converter
How do I fix code P0742?+
Test TCC solenoid — verify it releases; Inspect valve body; Replace torque converter; Rebuild transmission
How much does it cost to fix P0742?+
Estimated repair cost for P0742 is $500–$3000.
Is P0742 DIY-friendly?+
P0742 typically requires professional equipment and a qualified mechanic.

AI Diagnosis

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