× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0400 Diagnostic Trouble Code Discussion for December 2005

Exhaust Gas Recirculation System Flow Malfunction


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1997 Geo Tracker 1.6L readiness monitors VIN: 2CNBJ1364V
P0400: EGR System Performance. ... 1.6 - came in with mil light on code P0135 - O2 heater circuit - and P0400 -EGR flow - We replaced rear O2 sensor, cleared codes and drove. The mil light stayed out and the O2 code is gone. The readiness monitors - catalyst,EGR,EVAP - did not close. We gav...
December 09, 2005