Troubleshooting

DETECTING CONDITION AND TROUBLE AREA

HINT:
- When the DTC P0171 is recorded, the actual air-fuel ratio is on the LEAN side. When DTC P0172 is recorded, the actual air-fuel ratio is on the RICH side.
- If the vehicle runs out of fuel, the air-fuel ratio is LEAN and DTC P0171 is recorded. The MIL then comes on.
- If the total of the short-term fuel trim value and long-term fuel trim value is within +30--35%, the system is functioning normally.
- If the vehicle runs out of fuel the air-fuel ratio is LEAN and DTC P0171 is recorded. The MIL them come on.




















INSPECTION PROCEDURE