2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 350
Diagnosis Procedure
1.CHECK EXHAUST GAS LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst 1.
Is exhaust gas leak detected?
YES - Repair or replace malfunctioning part.
NO - GO TO 2.
2.CHECK FOR INTAKE AIR LEAK
1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
