P0404 Exhaust Gas Recirculation Circuit RangePerformance

Check Engine Light - P0404 : rMechanicAdvice p0404 Mazda6 - P0404 keeps returning even with new EGR - Had a P0404 fault code p0404 code p0404 and check light flashing Flashing CEL is usually multiple cylinder misfire Sounds like your EGR might be causing a vacuum leak

p0404 Detailed information on troubleshooting and repairing a p0404 automotive trouble code which refers to an EGR circuit range or performance issue Also includes