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2006 Cadillac DTS 4.6L MIL Lamp on
Posted to GM Driveability on 1/17/2015 19 Replies

Car came in with code P0420. Converter tested marginal so I replaced cat with a Walker Ultra and updated the computer with the latest software for false code P0420 setting. Ran bay test to run monitor and passed. Road tested vehicle while watching oxygen senso...

19 Replies Received (View Replies)

  Related Documents & Media  2006 Cadillac DTS

 
Message Closed w/FIX

car Vehicle Data

2006 Cadillac DTS

VIN 1G6KD57Y76
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

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

car Vehicle Data

2006 Cadillac DTS

VIN 1G6KD57Y76
Engine4.6 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)