MY CODE READER SAYS PO300 PO301 PO304 WHICH IS ...

1999 Mercedes Benz C230

Tiny

up29balne1

February, 27, 2013 AT 10:41 PM

My code reader says PO300, PO301, PO304, which is multiple cylinder misfire, cylinder #1 misfire and cylinder #4 misfire. Can you tell me where I should begin looking. Could it be a spark plug wire or in the cap?

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2 Answers

Tiny

caradiodoc

February, 28, 2013 AT 9:38 AM

Spark plugs and wires are the most common cause of misfires. If new ones don't help, swap some injectors, then see if the misfires show up for different cylinders.

Tiny

up29balne1

March, 4, 2013 AT 7:15 PM

Thank you, I will start there and hopefully that is it. I will let you know. Thank you again and this site.

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