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Buick
Lesabre
Trouble Codes
P Codes (Powertrain)
P0300 - P0399
P0300
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P0300 trouble code
FARMERJACK
MEMBER
2002 BUICK LESABRE
3.8L
6 CYL
2WD
AUTOMATIC
200,000 MILES
I have a p0300 trouble code with flashing check engine light and engine misfiring badly.
Thursday, October 24th, 2019 AT 8:34 AM
3 Replies
ASEMASTER6371
MECHANIC
52,797 POSTS
Good morning,
I would start by performing a compression test to make sure there is no internal damage to the motor.
https://www.2carpros.com/articles/how-to-test-engine-compression
How old are the tune-up parts?
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
I would also check the fuel pressure as well to be sure the proper amount of fuel is being sent to the engine.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Roy
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Thursday, October 24th, 2019 AT 8:54 AM
FARMERJACK
MEMBER
1 POST
I replaced the ignition control module and that fixed the P0300 trouble code and misfire. Thank you.
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Monday, October 28th, 2019 AT 12:11 PM
KEN L
MASTER CERTIFIED MECHANIC
47,702 POSTS
ASEMASTER6371 is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Monday, October 28th, 2019 AT 12:11 PM
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