2002 Chevrolet Impala 3.4L MIL Lamp on
Car came in with P0420 code (Catalyst System Low
Efficiency) running fine. Checked the rear O2 sensor and
found too much activity. Replaced the after market cat with
OEM cat and rear O2 sensor.
FIX posted 10/2/2007
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 14 Replies Received (View Replies)14 Replies Received (Hide Replies)Related Documents & MediaRelated Documents & Media |
Message Closed w/FIX
Vehicle Data2002 Chevrolet Impala
Trouble Codes
|
Message Closed w/FIX
Vehicle Data
2002 Chevrolet Impala
VIN | 2G1WF55E72 |
Engine | 3.4 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |