× 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
P0420 13k Miles Between Setting
Posted to Technical Discussion Forum on 1/30/2008 18 Replies

I have an 03 Monte Carlo that sets a P0420 once every 13000 miles or so.

Vehicle does have an OBDII aftermarket cat. Original concern was poor driveability along with the p0420 and misfire codes. Has had plugs, wires, Maf, and intake reseal done since origin... Login to read more.

18 Replies Received (View Replies)

 

car Vehicle Data

2003 Chevrolet Monte Carlo SS 3.8L

Engine3.8 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

2003 Chevrolet Monte Carlo SS 3.8L

Engine3.8 L
Trans4-speed Automatic (Electronic)