2003 Saturn L300 P300 code won't go away!!

2003 SATURN L300
123,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
PLINKER4FUN
  • MEMBER
  • 1 POST
I have had a P300 code on my Saturn for awhile. I have had the spark plugs, ignition coil replaced. Just had the fuel injectors cleaned, replaced the oxygen sensor and it still will not go away?? Any ideas........my trust in any mechanic is going down the drain with my wallet. Any help would be appreciate!!
May 26, 2009 at 11:48 AM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
P0300 Random Misfire normally points to vacuum leaks and bad fuel

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
May 26, 2009 at 9:59 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle