× 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
1999 Mercury Cougar 2.5L Monitors Won't Run
Posted to Ford Driveability on 5/22/2006 7 Replies

Hello fellow iATN members, I have this cougar that failed inspection for PO420. Had computer flashed per TSB. Drove vehicle for several days and cannot get evap and catalyst monitors to run, including a long highway run at steady 60MPH, let sit overnight, road...

7 Replies Received (View Replies)

  Related Documents & Media  1999 Mercury Cougar

 
Message Closed w/Summary

car Vehicle Data

1999 Mercury Cougar

VIN 1ZWFT61L6X
Engine2.5 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / multi port
EmissionsOBD-II Compliant
SymptomsMonitors Won't Run
OccursAlways

Trouble Codes

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

car Vehicle Data

1999 Mercury Cougar

VIN 1ZWFT61L6X
Engine2.5 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / multi port
EmissionsOBD-II Compliant
SymptomsMonitors Won't Run
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)