Codes PO420, PO300

What is your question?

I had my car diagnosed and some of the codes that came up where the 400 and the 300 should I have the whole cat. convertor be replaced or should I try the O2 sensor first?

donnambal in Apple Valley CA

Jan 13, 2014

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What are the best Saturn repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Saturn Ion. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

Popular Answer

Codes PO420, PO300

What is your question?

I had my car diagnosed and some of the codes that came up where the 400 and the 300 should I have the whole cat. convertor be replaced or should I try the O2 sensor first?

donnambal in Apple Valley CA

Jan 13, 2014

1 Reply

Popular Answer

ProfessorGon Jan 14, 2014

My first question is, if you had it diagnosed, then you should have the answer to that. Just because the code has been read, that isn't a diagnosis. After the codes have been read, then you use that information to guide you to the fault. Finding the fault is the diagnosis, and we are not part changers, that fault needs to be diagnosed to find the correct answer.

donnambalon Jan 14, 2014

That's what I thought as well, but that is all they did with also stating I should take it to the dealership to be worked on. That they could order the converter which would be around $500 just for the part. So I guess that is $75 dollars down the drain! thanks for your answer

ProfessorGon Jan 14, 2014

A good muffler shop should be able to install one for less money. If that's actually is the problem.

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Popular Answer

What are the best Saturn repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Saturn Ion. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.