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DTC code page

P0742: Torque Converter Clutch Circuit Stuck On

Quick answer: The controller believes the torque converter clutch is staying applied when it should be released.

Drivers also search this fault as torque converter clutch stuck on, TCC stuck applied, converter clutch not releasing.

Severity: high Family: powertrain Related paths: 6
Meaning

What P0742 usually means

P0742 is the opposite-side torque-converter-clutch failure from the usual stuck-off story. Here, the TCM sees evidence that lockup is staying on too long or releasing poorly. That often creates shudder, stalling tendencies at low speed, harsh coastdown behavior, or an engine that feels dragged down when coming to a stop. The code can come from a stuck TCC solenoid, a valve-body problem, contaminated fluid, or an internal converter clutch issue that does not release cleanly.

Fast triage

Start here before chasing parts

  • Scan first: save freeze-frame and pending codes before clearing anything.
  • Confirm the complaint: compare the stored code with current drivability symptoms.
  • Use context: trims, live data, and related codes usually narrow the fault faster than guesswork.
  • Work simplest to hardest: leaks, connectors, maintenance items, and known patterns before expensive components.
Initial checks

What to check first

  • Ask whether the engine tries to stall or drags badly when coming to a stop, because that complaint matches P0742 well.
  • Look at TCC command versus actual slip during decel and low-speed release events.
  • Check fluid condition because varnish and debris make release-side TCC faults more believable.
Driving risk

Can you keep driving?

P0742 can cause stall-prone or harsh low-speed behavior. If the vehicle shudders badly or tries to die when stopping, driving should be minimized until the lockup problem is fixed.

High urgency: If symptoms are active, reduce driving and diagnose quickly before secondary damage builds.
Symptoms

Common symptoms

  • Harsh Shifting
  • Stuck in Limp Mode
  • engine feels like manual car stopping without clutch
  • shudder when slowing down
  • stall at stop
  • dragging feeling at low speed
  • harsh decel with transmission code
Likely causes

Common causes behind this code

  • Torque converter clutch solenoid stuck on or commanded on incorrectly
  • Valve-body contamination or sticking valve in the lockup circuit
  • Dirty or overheated fluid causing poor release behavior
  • Internal torque converter clutch that remains applied
  • Wiring or control fault keeping the TCC applied when it should be off

Cause phrases often tied to this code: stuck TCC solenoid, valve body sticking, dirty transmission fluid, torque converter clutch not releasing, internal hydraulic problem.

Diagnostic order

Suggested workflow

  1. Review freeze-frame and determine whether the fault appeared during decel, coastdown, or after highway lockup.
  2. Monitor TCC command and converter slip to see whether the clutch remains applied after release should occur.
  3. Inspect wiring and connector condition if the control state looks suspicious.
  4. If the command behaves normally but lockup stays on, widen the diagnosis to the solenoid, valve body, and converter internals.
  5. After repair, confirm smooth release on the road and normal stopping behavior without shudder or stall tendency.
Avoid guesswork

Common mistakes

  • Misreading the complaint as an engine idle problem when the converter clutch is really dragging the engine down.
  • Changing fluid as a first and only fix without verifying the release command and slip data.
  • Ignoring how the symptom changes specifically when slowing to a stop.
Repair path

Practical fix guidance

  • Use P0742 to focus on the release side of converter control rather than only the apply side.
  • If the scan tool shows normal release commands but the converter stays coupled, internal hydraulic or valve-body faults move higher on the list.
  • Confirm the repair with repeated hot decel tests, not just a short drive around the block.
Vehicle context

Affected brands in this MVP

Brand hubs help broaden internal linking now and can evolve into make-specific diagnostic notes later.

Aliases and common searches

English phrases tied to P0742

Useful when the driver knows the wording but not the exact DTC yet.

  • torque converter clutch stuck on
  • TCC stuck applied
  • converter clutch not releasing
Related search intent

Queries this page can answer naturally

  • P0742 code meaning
  • what does P0742 mean
  • torque converter clutch stuck on symptoms
  • TCC not releasing
FAQ

Quick questions about P0742

Can P0742 make the engine stall at a stop?

Yes. If the converter clutch stays applied, the drivetrain can drag the engine down as the vehicle stops.

Is P0742 the same as P0741?

No. P0741 usually points to lockup not applying correctly or staying off, while P0742 points to lockup staying on.

Can dirty fluid cause P0742?

Yes. Contaminated fluid can contribute to sticking valves and poor converter-clutch release.