P0302 Misfire in cylinder #2 - Volvo Forums - Volvo Enthusiasts Forum

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Old 10-28-2009, 10:23 PM
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Default P0302 Misfire in cylinder #2


I have a 2000 S40 with 70,000 miles. The car just developed a misfire on cylinder #2 and is throwing a P0302 error code. When I clear the code it comes right back immediately.

The engine runs fine except for a mis every 20-30 seconds, and soetimes it goes for a minute or two without a mis. I would think if it was electrical it would be more of a steady mis.

No other codes are present, and no misfires in the other cylinders.

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Old 10-28-2009, 11:23 PM
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Have you changed plugs lately? Possibly a bad coil.
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Old 10-29-2009, 10:46 AM
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Originally Posted by AutoNaut View Post
Have you changed plugs lately? Possibly a bad coil.
x 1,000,000
You can check the coil for signs of arcing (burn marks, etc)

P0302 = Cylinder 2 misfire

And in the future, my frequently asked questions thread has a lot of valuable information in it, including this info about misfiring.
Here: https://volvoforums.com/forum/volvo-s40-11/frequently-asked-questions-34712/
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