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Home >> Infiniti >> 2002 >> Q45 >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (Engine Control System) >> DTC P0171, P0174: Fuel Injection System Function >> Diagnostic Procedure >> 1. Check Exhaust Gas Leak

1. Check Exhaust Gas Leak

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start engine and run it at idle.
  2. Listen for an exhaust gas leak before three way catalyst (manifold).

OK or NG 

OK: GO TO 2.

NG: Repair or replace.

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