1999 Toyota 4Runner 6 cyl Four Wheel Drive Automatic 177000 miles
After my check engine light went on, it was diagnosed as cat. System efficiency below threshold (P0420).
Replaced the front cat. Converter - light when back on after 6 days
Same code - replaced rear cat converter and sensor - light when on after 6 days
Same code - replaced front sensor - light went on after 3 days
Same code - replaced front cat. Converter again - light went on after 6 days
Could it be the computer?
Any suggestions would be appreciated. It's getting costly at this point.
have the same problem?
Wednesday, June 3rd, 2009 AT 10:01 AM