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1998 Chevrolet Astro 4.3L MIL Lamp on
Posted to GM Driveability on 5/29/2001 8 Replies

We need a little help, Please!

Vehicle came in with a PO420 code, Three way catalytic converter system low efficiency. Down stream sensor was lazy and sometimes would show negative voltage. Renewed O2 sensor and checked the operation and it looked good. Chech...

8 Replies Received (View Replies)

  Related Documents & Media  1998 Chevrolet Astro

 
Message Closed w/Summary

car Vehicle Data

1998 Chevrolet Astro

VIN 1GCDL19W9W
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / Vortech
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIdle
Misc.Awd

Trouble Codes

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

car Vehicle Data

1998 Chevrolet Astro

VIN 1GCDL19W9W
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / Vortech
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIdle
Misc.Awd

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)