
2005 Pontiac Grand Prix 3.8L MIL Lamp on
Customer brought in the car with a check engine light on, po420, we thermal tested the cat & found a 30 degree rise in temp, front to back, replaced the converter, roadtested and the code came back within 20 miles, we monitored the o2 sensors and found a glitc...
FIX posted 6/23/2010
![]()
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle (View Replies)18 Replies Received(Hide Replies)18 Replies Received
|
Message Closed w/FIX
|
VIN | 2G2WP52205 |
Engine | 3.8 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection / MPFI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Misc. | Po420 |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2005 Pontiac Grand Prix
VIN | 2G2WP52205 |
Engine | 3.8 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection / MPFI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Misc. | Po420 |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |