P 0430 Cadillac Sts . It's quite embarrasing when your girlfriend, who does not know anything about cars. It happens at stop lights and...

P 0430 Cadillac Sts

P 0430 Cadillac Sts. It's quite embarrasing when your girlfriend, who does not know anything about cars. It happens at stop lights and while waiting in drive thru lines, dealer says it is normal with the high performance sts-v engine that I have.

2006 Cadillac STS - Overview - CarGurus
2006 Cadillac STS - Overview - CarGurus (Franklin Rios)
Turns out the ecm connectors needed cleaned and had been undone once before. Your STS has at least two oxygen sensors, one before and after the catalytic converter. It's quite embarrasing when your girlfriend, who does not know anything about cars.

It happens at stop lights and while waiting in drive thru lines, dealer says it is normal with the high performance sts-v engine that I have.

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In simple terms, it means that more pollution is added into the air than what was supposed. Turns out the ecm connectors needed cleaned and had been undone once before. It is a check engine light code which indicates that the catalyst's system efficiency is less than the required threshold.