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1998 Chevrolet Lumina 3.1L MIL Lamp on
Posted to GM Driveability on 1/19/2007 26 Replies

This car came in with the MIL and P0420 on steady. I want to know if the cat needs to be replaced or not. I took the following readings with my scanner. @ idle the front O2 toggles from 100mv to 500mv, STFT 0% 128 BL, LTFT -26% 94 BL and the cat temp was 512 d...

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  Related Documents & Media  1998 Chevrolet Lumina

 
Message Closed w/FIX

car Vehicle Data

1998 Chevrolet Lumina

VIN 2G1WL52M6W
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursCruise, Idle

Trouble Codes

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

car Vehicle Data

1998 Chevrolet Lumina

VIN 2G1WL52M6W
Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursCruise, Idle

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)