1997 GEO METRO EGR FLOW FAULT CODE

  • Tiny
  • 2CarPros-Archives
  • 1997 Geo Metro
  • 4 CYL
  • FWD
  • automatic
  • 117,000 miles

1997 Geo Metro 1.3 mileage: 117,000. I keep getting an EGR flow fault (P0400). I have replace the EGR valve, solenoid, modulator, and taken off the intake to clean out the EGR port. However I am still getting the same fault. I have plugged off the EGR valve vacuum and still flow fault. I don't know what else to try. I have run a vacuum check on all components, and all show to be working and holding vacuum. I don't know what else to try. I also had it in the Chevrolet dealership. All they did was clear the fault! And, said they couldn’t find anything wrong.

Thursday, January 13th, 2011 AT 10:06 PM

1 Answer

  • Tiny
  • 2CarPros-Archives
  • Member

The EGR system in your car is probably functioning okay. The fault code that you are receiving, more likely than not, is the result of a faulty sensor that monitors the movement of the EGR valve.

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Thursday, January 13th, 2011 AT 10:08 PM

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