A service engine soon light may be experienced on low-mileage vehicles.
2002-2018 Cadilac Escalade2002-2013 Chevrolet Avalanche2002-2018 Chevrolet Express2002-2018 Chevrolet Silverado
CONDITION/CONCERN
A service engine soon light may be experienced on low-mileage vehicles, or vehicles that have recently had the catalytic converter replaced and DTCs P0420 and/or P0430 may be stored.
It’s important to understand the basics of catalytic converter chemistry and how catalytic converter failures are diagnosed.
If a replacement does not meet or exceed the flow characteristics of the original, it could mean more than a loss of power.
Understanding catalytic converter efficiency codes can be a long road to a happy customer or an expensive comeback.
The engine management system does not know there is a crack in the manifold.
Catalytic converters have become a hot product among thieves. Has the global pandemic played a part?
If an engine breakdown were to occur, debris may be deposited in the converter through engine exhaust ports.
Catalytic converter replacement is easy – it is the ordering and associated paperwork that can be difficult.
The culprit could be a misadjusted shift cable.