How I Fixed my P0300 Code on my 2002 Buick LeSabre 

Yes the dreaded ICM failure on these motors is no joke. A few tips I found doing these. Always use thermal paste between icm and base plate to help transfer heat. Also if you do buy a new one in never buy aftermarket, either go Ac delco or delphi.

Thank you for this video. I went and bought 3 coils before I watched this video. Now i can take those back and get my 100 bucks back. Went to the salvage yard got a icm for 27 bucks and I'm running again. Especially since a brand new one is 200 to 250 depending where you go. I live in Texas and like you said these cars don't like hot weather. I'm probably gonna go pick up another one as a back up. Thank you again.

Good information. These engines have a few issues but all in all you can't beat em. Parts are cheap and an average guy can actually diagnose and fix them

This was super helpful. Mine is a 2006 Pontiac Grand Prix but only has a misfire when it warms up it seems. So thinking bad ground or the ICM. Ohm tested the coils and all the same about 6.5 avg. Will post again when I have it fixed.

Much Gratitude. I have a 2000 buick lesabre with the same problem

Thanks! have a park avenue with the same issue, also nice pair of cars man!

Love my 2003 Park Avenue. Yes, she has/had issues, but parts are cheap and plentiful! And this thing is a breeze to work on compared to newer cars. The systems are simple, no weird or exotic parts, which is nice. A good scan tool that can clear codes is a must, but after that, simple hand tools and a bit of of elbow grease, just about anything on the motor can be repaired in the driveway. One thing, try to use OEM parts when you can, especially for items like this ICM and the sensors. A tip on the MAF sensor. Hitachi was the original OEM manufacturer for GM, and they still make that MAF sensor for purchase, it is MAF0047 and can be found on Rock Auto for $70. I just installed one, works perfectly.

Man thank u so much this video saved my ass

Thanks for video. These engines seem simple enough.

I got the 0300 then swapped coils and got a 0305 which was so stupid . Goin to go to the junkyard to see if a ICM will fix it.

Man u are lucky..i jus did wires and plugs and the ignition control module that was 256 dollars and ignition coils that was 56 dollars a piece and i needed 3 and my problem still isn't fixed all the way..last thing is the sensor..man this kicked my ass and my pockets

Played $125 for a new one. There is a fuse that blew also. Took awhile to figure that out

Wow great video! I replaced the MAF, ICM, coils, spark plugs & wires. Only thing left seems like the (cps) crankshaft position sensor or maybe the camshaft. My 01 lesabre is not accelerating smoothly and has a rough idle with P0366 code but no check engine light. It's also not stalling so your video is making me doubt it's the cps

I just changed all my spark plugs and coils. a P0300 is a random or multiple misfire.

How important is that ground that goes to one of the bolts that hold the bracket? I ripped off mine removing that nut with a cordless ratchet.

I get this is an older video but im trying this tmr on my 2003 buick lesabre custom bc i have replaced plugs plug wire all 3 coils cam shaft postion censor and crank shaft postion censor i pray this is whats wrong

I was helping my friend diagnose his 2000 Lesabre with the same problem/p0300 code. The car was turned on (not running) while we were looking under the hood, and the 1/4 coil just started smoking and melting before our eyes. He bought a new coil, but maybe he shouldn't install it until he gets the ICM replaced?

U said spark plug wires talking about the sparky things next to the coils? But not to be confused with the spark plugs next to the firewall and in front of the engine right?

Did yours also fail the vacuum test? Currently have this code with my 2005 and can't track the issue

Was wondering I have the code po300 do u have to reprogram the icm

As a diagnostician I find that very time consuming and doing a new factory ICM and be done with it for a lifetime and done many and they have never came back after. Tip of the day : Test don’t guess cuz it can be pricey shooting the parts cannon. But had a couple of them and all been very reliable with no issue apart those them rusty rocker panels but overall very reliable and they don’t make them built like that anymore.

Had the p0300 , changed the ICM ran good code went away then all a sudden I get a P1635 code any help , been searching the web and can’t find any solid leads on this new code …

Would u have to reprogram the icm

Have you ever got a code for the MAF then replace it and still have the code

very interesting video, but the constant camera movement is nauseating to watch.

You need to spin the camera around more. But good info!

It's 50 where I'm from... Guess I'll fork it over, I changed the voltage regulator and same issue, to be fair the battery/alternator/starter thing they use at parts store said bad diode but... didn't fix unless lol i got a bad volt regulator but.... maybe the icm could be it.... it is p0300 that was on the code. No other thing that I wasn't already aware of already (like the missing cat)

Gotta use Heat sink paste on the back or they will burn out quick

6:27

No injector problems ?

Hey, you stole my grandma's car!

Need Silicone Heat Sink Compound on the back of it to transfer the heat away or it will get hot and shorten the life.