× 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
2002 Chevrolet Impala 3.8L Poor Idle Quality, Cuts out, MIL Lamp on
Posted to GM Driveability on 10/30/2008 7 Replies

Customer came in for yearly state inspection, which in Upstate New York you have to pass both a safety and a low enhanced emissions test. Check engine light was on so we scanned car and found po420 catalyst eff. limit. Car has a new convertor on it. And new o2...

7 Replies Received (View Replies)

  Related Documents & Media  2002 Chevrolet Impala

 
Message Closed w/FIX

car Vehicle Data

2002 Chevrolet Impala

VIN [No VIN Available]
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Cuts Out, MIL Lamp On
OccursCold, on Accel, Idle, Intermittently
Misc.3.8 Liter

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed w/FIX

car Vehicle Data

2002 Chevrolet Impala

VIN [No VIN Available]
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Cuts Out, MIL Lamp On
OccursCold, on Accel, Idle, Intermittently
Misc.3.8 Liter

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)