LEMON Manuals: Even more car manuals for everyone
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 >> Low Line Pressure

Low Line Pressure

WARNING: This page is about a different variant/trim than selected.
Low Line Pressure

Checks Cause
Pump (203) Cross channel leak at body to cover, or cross channel leak at body to case gasket
Pressure Regulator Valve (231) Valve is stuck at a low torque signal due to an undersized bore or to sediment.
Reverse Boost Valve (228) Valve is stuck at a low torque signal due to an undersized bore or to sediment.
Pump Valve Bores Excessive valve clearance due to wear.
Spring (230) The spring is broken.
Retainer Pin (211) The pin is broken.
Valve Body (301)
  • Cross channel leaks
  • Cross valve land leaks
Gasket/Spacer Plate The plate is damaged or missing.
Pressure Control Solenoid Valve (320)
  • The valve is stuck On.
  • A broken clip causes leakage.
  • A wire is pinched to ground.
  • A screen is missing.
PCM Failed
Check the PCM for current DTCs.
scientia non olet · About LEMON Manuals