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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Trouble Shooting) >> Troubleshooting >> Incorrect Torque Converter Clutch (TCC) Apply or Release

Incorrect Torque Converter Clutch (TCC) Apply or Release

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Incorrect Torque Converter Clutch (TCC) Apply or Release

Checks Cause
AT Output Shaft Speed Sensor Assembly (22)
  • Poor connection
  • Pinched wire
  • A broken coil wire
  • Incorrect air gap
  • Inadequate signal
Throttle Position Sensor
  • Poor connection
  • Pinched wire
  • Incorrect resistance
PCM Failed
Automatic Transmission Fluid Pressure Manual Valve Position Switch (40)
  • Poor connection
  • No signal to the PCM
  • Pinched wire
AT Fluid Temperature Sensor Assembly (332)
  • Poor connection
  • No signal to the PCM
  • Incorrect resistance
  • Pinched wire
Engine Coolant No signal to the PCM
Brake Switch
  • Poor connection
  • Pinched wire
  • No voltage supply
  • Misadjusted
Engine Ignition Module Loss of signal or intermittent
Check the PCM for current DTCs.
Only 2WD