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1998 GMC Jimmy Envoy 4.3L MIL Lamp on
cat was replaced before the truck came here. it is an aftermarket unit and is "cut to fit" we replaced all three o2 sensors. check engine light is back on same code. i think it needs an o.e. cat. please help.
FIX posted 9/19/2003
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Message Closed w/FIX
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Related Documents & Media | VIN | 1GKDT13W3W |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
Trouble Codes
| 420A | twc system low efficiency b1 |
Message Closed w/FIX
Vehicle Data
1998 GMC Jimmy Envoy
| VIN | 1GKDT13W3W |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
Trouble Codes
| 420A | twc system low efficiency b1 |
Video