Anybody good at diagnostics? I keep seeing the same trouble code set on my
1999 Subaru Outback. I have a code reader and it sets a P0400 which translates to a EGR system malfunction. I've check the EGR system as per the Haynes manual. I'm leaning towards perhaps the computer is receiving bad info from one of the O2 sensors and the computer interprets the faulty signal as an EGR malfunction. Any help?- posted
20 years ago