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Start with what each code is accusing
P2761 is the narrowest electrical accusation here because it points at the torque-converter-clutch pressure-control solenoid circuit being open or unavailable. P0743 is broader and says the TCC solenoid circuit is electrically wrong, but not necessarily in the same exact way. P0741 is different again because it says the command and the result do not match well enough during real operation, which can happen after the electrical side, hydraulic side, or converter clutch itself fails to do its job.
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Why P2761 should keep you on the circuit branch first
When P2761 is present, the graph should lean hard toward connector condition, internal harness integrity, case-pass-through trouble, solenoid coil continuity, and command-path proof before anyone prices a converter. It is one of the clearest reminders in the whole TCC cluster that the system can lose lockup for electrical reasons long before the converter itself becomes guilty.
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Where P0743 sits differently
P0743 still belongs in the electrical branch, but it often means the controller is seeing an abnormal current or voltage pattern rather than a clean open circuit. That makes wiring damage, shorted sections, poor grounds, and a failing driver more plausible than they are on a textbook open-circuit story. In practice, P0743 is the code that says do real electrical testing, not just a continuity check and a shrug.
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What makes P0741 the performance branch instead
P0741 earns a different diagnostic order because the controller is usually seeing a believable lockup request that does not reduce converter slip enough. Dirty fluid, valve-body wear, a worn converter clutch, or hydraulic leakage become much more believable there. The mistake is treating P0741 like an automatic converter replacement or treating it like the same thing as an open circuit when the scan data may show the command path is alive.
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Do not ignore brake-switch and intermittent lockup clues
P0719, P0724, and P0744 belong nearby because the TCM can cancel or disturb lockup when brake input is wrong or when the command path fails only intermittently. A vehicle that sometimes locks and sometimes does not is not telling the same story as one that never achieves lockup from the first minute of the road test.
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A practical split that saves expensive guesses
If P2761 or P0743 is present, prove power, ground, resistance, and harness integrity before widening the diagnosis. If P0741 returns with believable commands and high actual slip, widen toward fluid condition, valve-body control, and converter hardware. If lockup disappears only intermittently or only when brake-input data looks irrational, do not skip the brake-switch and intermittent-control branch just because the complaint feels transmission-related.