Definitely check your vacuum lines too. A leak can mess with your air-fuel mixture, causing a misfire and throwing that P0300 code.
That’s super helpful! I’ll add that to my list of checks. You can never be too thorough with troubleshooting!
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Honestly, I think GM just has a knack for throwing random codes at us! It’s like a game, and I’m losing.
I hear you! It makes troubleshooting feel like an ongoing episode of a bad reality show!
Just remember to stay patient! These things can take time to figure out. Replacing components you don’t need can get expensive.
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Definitely! That’s a vital reminder. Sometimes patience is the best tool in troubleshooting!
I had the P0300 code on my 2010 Tahoe and it turned out to be bad spark plugs! I replaced them myself for around $100. It really improved performance too!
Did you notice any specific symptoms before replacing them? I’m just curious since my Tahoe is showing similar signs.
I had a similar issue! For me, it was a faulty ignition coil. Had to take it to the shop, and they charged about $300 for parts and labor.
That’s good to know! Was the car running rough or just showing the code? Trying to decide if I need to go to a mechanic or not.
It was definitely running rough! If you’re feeling unsure, I recommend having a professional check it out first.
I’ve had the P0300 code for ages! I tried changing my air filter and adding some fuel injector cleaner. Don’t know if it helped, but the code cleared for a while!
That’s interesting, [quote=“hillbrian, post:6, topic:1411”]I tried changing my air filter and adding some fuel injector cleaner.[/quote]
I’ve heard mixed results about the cleaner. Some say it works wonders, while others… not so much!
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I guess it depends on the condition of your fuel system. I had pretty much given up until I replaced my fuel injectors. It wasn’t cheap, but the Tahoe runs like new now. Total was around $600.
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Ouch! That sounds pricey! Did you DIY or go through a shop?
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I had a mechanic do it. I wouldn’t trust myself with something that intricate. My Tahoe needs to stay reliable!
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You guys should try getting a second opinion! I went to three different mechanics before I got the right fix! Who knew, right? LOL.
Wow! That sounds like quite the adventure! What was the final fix in the end?
It turned out to be a simple vacuum leak! Just shows you how complex these things can be. $150 later, and I was back on the road!
Thanks for all this info! I’m planning to tackle my Tahoe’s P0300 code this weekend. Hopefully, I can avoid the mechanic too!