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2000 Chevy Impala Code PO304

Tiny
KARO89
  • MEMBER
  • 2000 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 28,000 MILES
Hi I was just leaving my house and the check engine light started flashing and this code is what came up. I was wondering what I can do to fix the problem. Do you have any ideas what to do?
Saturday, October 18th, 2008 AT 11:24 AM

2 Replies

Tiny
KARO89
  • MEMBER
  • 2 POSTS
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Saturday, October 18th, 2008 AT 11:32 AM
Tiny
RENAUDTN
  • MECHANIC
  • 636 POSTS
Do you have any symptoms? (Car stumble, hard to start.)

This code means your 4th cylinder is not firing properly.
A number of things could trigger this code:

bad Spark plug/wire/ignition module/coil/fuel injector
burn exhaust valve
poor compression
O2 sensor
clogged catalytic converter

If your car doesn't have any symptom, try to delete the code and see if it comes back. If it does, you'll have to check what I mentioned above
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Monday, October 20th, 2008 AT 9:17 AM

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