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2003 Chevrolet Malibu P0440, P0404, and P1404 Codes - Inspection Failure After EGR and Catalytic Converter Replacement

Model: 2003 Malibu Fault Code: P0404 Posted: 2016-07-16 15:30

I'm trying to get my 2003 Chevrolet Malibu to pass emissions inspection. The vehicle is showing trouble codes P0440, P0404, and P1404. We have already replaced both the EGR valve and the catalytic converter. Despite these repairs, the codes persist. Can anyone provide guidance on possible causes or solutions for these specific OBD2 codes in a 2003 Malibu? Any advice on next steps would be greatly appreciated.

Related fault codes
P0404P0440P1404
Comments (1)
Anonymous 2016-07-16 16:01

Check this forum for detailed explanations of P0440, P0404, and P1404 codes in 2003 Malibu models. Be sure to perform circuit wiring and voltage checks on the EGR system and evaporative emissions components as these are common root causes.