Powertrain, generic (extended)

P2762 Torque Converter Clutch Pressure Control Solenoid Control Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2762 covers a solenoid circuit that is neither open nor shorted but does not behave as commanded. In GM's six-speed TCM tables for the MW7 (2016) and T87A (2018) the module compares desired with measured solenoid current; a gap of 0.5 A or more in at least 40 of fewer than 80 samples sets the code as Type B, with battery voltage above 10 V. For the T76 six-speed of 2016, GM instead calls it a rationality test that fails when the hardware layer reports an out-of-range voltage in 4.4 of 5 seconds, and lists it without MIL. Rising coil resistance, a weak supply or ground, or a current-sensing fault in the TCM are typical. Lockup may feel harsh or soft, since the pressure no longer follows the target.

Likely causes

Solenoid coil resistance out of specification
Weak supply voltage or poor ground at the TCM
High-resistance terminal in the circuit
Current sensing fault inside the TCM

Symptoms

  • Harsh or slipping converter lockup
  • Shudder at light throttle in higher gears
  • Warning lamp depending on application (GM T76 none)

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–1,200
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

tcc pressure solenoidwiring harness

Related codes

P2761P2763P2764P2757

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.