Check Engine Codes / P0740
P0740 Code
Torque Converter Clutch Circuit Malfunction
What it means
The clutch that locks the torque converter at cruising speed isn't engaging correctly — can be electrical, fluid-related, or the converter itself.
Can you keep driving?
Yes, but expect worse fuel economy; don't ignore shudder at highway speed.
Common causes
Listed most-common first. Fix cost depends on which one it turns out to be — check your quote free below.
⚠️ Don't get ripped off
A basic fluid service resolves some TCC shudder complaints. Converter replacement means transmission removal — big labor — so make sure the cheap fixes were tried and get a second quote before approving that.
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Related codes
Informational only — codes share symptoms across vehicles, so proper diagnosis on your specific car always comes first.