For Shop Owners

P0401 ISUZU - Exhaust Gas Recirculation Flow Insufficient Detected

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • EGR passage clogged
  • Faulty EGR Vacuum Modulator Valve
  • Faulty EGR Valve
  • Faulty EGR solenoid valve
  • EGR solenoid valve harness is open or shorted
  • EGR solenoid valve circuit poor electrical connection
  • Dead (Weak) battery
  • Faulty EGR temperature sensor and circuit
  • Exhaust gas leaks
What does this mean?

Tech notes

EGR flow malfunction could be caused by a clogged EGR valve or EGR tube. Before replacing any parts try cleaning the EGR valve, tube and passages.
What does this mean?
Check this articles: u2012 | p0171 mazda protege | code po303
Posted and Edit by kvjournal.ru 06-14-2015