Typical Malfunction Thresholds
P0171, P0172, P0174 AND P0175: 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) |
P0171, P0172, P0174 AND P0175: FUEL-TRIM LEAN/RICH FOR MEXICO MODELS
| 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 | 48% 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) |