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2002 Buick Regal LS 3.8L MIL Lamp on
Posted to GM Driveability on 10/16/2008 25 Replies

Replaced converter with OE (twice) and code returns. No other codes. O2 readings appear normal.

I assume converter isn't the problem. What should I look for?

25 Replies Received (View Replies)

  Related Documents & Media  2002 Buick Regal LS

 
Message Closed w/FIX

car Vehicle Data

2002 Buick Regal LS

VIN 2G4WB55K62
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

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

car Vehicle Data

2002 Buick Regal LS

VIN 2G4WB55K62
Engine3.8 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)