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2002 Cadillac Seville SLS 4.6L MIL Lamp on
Posted to GM Driveability on 12/11/2013 16 Replies

Vehicle was in for running rough and misfires. Found bad ign module. Replaced and ran good. Came back a month later with p0420 code. Cat effic. Replaced the cat with bolt on eastman cat. 2 months later same code. Replaced again. Just under 2 months, same code ...

16 Replies Received (View Replies)

  Related Documents & Media  2002 Cadillac Seville SLS

 
Message Closed w/Summary

car Vehicle Data

2002 Cadillac Seville SLS

VIN 1G6KS54Y92
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

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

car Vehicle Data

2002 Cadillac Seville SLS

VIN 1G6KS54Y92
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection / sefi
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)