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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Automatic Transmission - 6T45 (MH7) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0741 or P0742 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

The components are listed from the least to the most intrusive to service.

Component DTC Condition
Q8 Control Solenoid Valve Assembly P0741, P0742
  • Q39A Torque Converter Clutch Pressure Control Solenoid Valve - Binding or Sticking / Stuck
  • Blocked by debris/Restricted or Cracked
  • O-Ring - Leaking
Control Valve Channel Plate P0741 Oil Channels or Orifices - Blocked by debris/Restricted
Control Valve Channel Plate Spacer Plate P0741 Oil Channels or Orifices - Blocked by debris/Restricted
Control Valve Upper Body P0741 Exhaust - Oil Channels or Orifices - Blocked by debris/Restricted
P0741, P0742 Torque Converter Clutch Regulator Valve - Binding or Sticking/Stuck
Torque Converter P0741
  • Torque converter clutch friction lining worn.
  • Torque converter bolts too long damaging the clutch friction surface.
  • Torque Converter Fluid Seal - Leaking
Automatic Transmission Case Cover P0741, P0742
  • Pressure release valve leaking.
  • Spring - Damaged spring.
Automatic Transmission Fluid Pump Assembly P0741, P0742 Torque Converter Clutch Control Valve - Binding or Sticking /Stuck
Stator Shaft Support P0741 Seal - Leaking
Turbine Shaft P0741 Turbine Shaft Seal - Leaking
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