Typical Malfunction Thresholds
WARNING: This page is about a different variant/trim than selected.
P0171 AND P0172: FUEL-TRIM LEAN/RICH
| EVAP purge-cut | Executing |
| Either of the following conditions is met | 1 or 2 |
| 1. Average between short-term fuel trim and long-term fuel trim | 35% or higher (varies with engine coolant temperature) |
| 2. Average between short-term fuel trim and long-term fuel trim | -35% or less (varies with engine coolant temperature) |