Exhaust Smell and/or Leak with Possible Malfunction Indicator Lamp Illuminated Condition Some customers...
Chevrolet technical service bulletin 17-NA-321 for 2014-2018 Chevrolet Impala and 2013-2018 Cadillac XTS.
- Bulletin number
- 17-NA-321
- Component
- Engine and engine cooling: exhaust system: emission control: catalytic convertor
- Summary
- Exhaust Smell and/or Leak with Possible Malfunction Indicator Lamp Illuminated Condition Some customers may comment on an exhaust smell and/or leak with possible malfunction indicator lamp illuminated. During diagnosis, a technician may find DTC P0430 and/or P0420. Cause This may be due to a crack around the catalytic mounting flange. Correction Replace converter assembly with new service part.
Owners of these vehicles have filed 144 complaints in the engine category.
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