P0171, P0172, P1171, P1172
Read the instructions below then start the fault diagnostic procedure.
Symptom: The CHECK ENGINE lamp (MIL) comes on
P0171, P0172, P1171, P1172 |
Fuel Trim. Max Value, Air/Fuel too Lean.
Fuel Trim. Min Value, Air/Fuel too Rich.
Variable Intake Manifold Outer Flap Valve Circuit. Short to Ground.
Variable Intake Manifold Outer Flap Valve Circuit. Short to B+.
Fault symptoms
The CHECK ENGINE lamp (MIL) comes onConditions
P0171,P0172:More than 25% enrichment or more than 25% leaner for at least 60 seconds.
P1171, P1172:
The air flow through the IAC-valve when idling is too small or too big in relation to the expected value