Having problems with your 2000 Mercury Grand Marquis ?

What does a Code P0300 mean? - 2000 Mercury Grand Marquis

Posted / edited by AnonymousUser on : 10-05-2021

Answers :

Code 300 means there is a random miss in the engine.
The problem is not major enough to pick one cylinder.
You may have to wait until it gets bad enough to get a code for one cylinder to find the problem.
If the spark plugs are original, you could go ahead and replace them to mark that off the list of possible causes.
Repair Help & Product Troubleshooting for 2000 Mercury Grand Marquis

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