Home/Chevrolet/Uplander/Chevrolet Uplander I (2004-2008)/Repair manual/Testing & Diagnostics/P1133 (2)

Contents

Wiring diagrams Section: Testing & Diagnostics

Engine Controls - 3.5L - Introduction (1 of 2)

Engine Controls - 3.9L - Introduction (1 of 2)

All sections

P1133 (2) Chevrolet Uplander I

Testing & Diagnostics

The ECM detects that the HO2S 1 voltage did not have enough switches from rich-to-lean and lean-to-rich during a 90 second monitoring period.
This diagnostic runs once per trip.