LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 421 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0172: Fuel Trim System Rich >> Diagnostic Aids

Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Fuel contamination, such as water and alcohol, will affect fuel trim.

A malfunctioning MAF sensor can cause a rich condition and set this DTC. See DTC P0101: MAF SYSTEM PERFORMANCE .

Using a scan tool, review the Failure Records. If an intermittent condition is suspected, see INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.

scientia non olet · About LEMON Manuals