Chevy Silverado GMC Sierra P0300 Diagnosis and Repair 

You are not a fat, old, balding guy who is losing his mind. You are an experienced, distinguished, full sized car repair artist. Always enjoy your videos

I have watched just three of your videos after finding you on RU-vid and all three vids fixed the problem I was having. Thank you ever so much for blowing up my parts cannon. You rock Tim!

'...and you burn yourself just like that...' I finally found this video on the goose chase of fixing my p0300 trouble on an '01 Silverado. This was a very helpful video and a lot of fun to watch. I had no idea a) where the O2 sensors were located and b) that they would effect idle, fuel economy and ride quality. Thanks so much for posting this!

This was very educational and super helpful. I love that you tried to get the most helpful angle for the various steps! And seeing that other cat was helpful too.

This is exactly the video I was needing, thank you times a million for taking the time to post this. My truck is an 05 with the 5.3 and has exactly this same problem. I thought even tho the bank one sensor one was bad I might be having trouble with the plugs and wires. I had no idea that an oxygen sensor would make a vehicle run rough like that. Thanks again so much!!!

Great heads up!!!! A buddy and myself pulled an 09 denali 6.0 that had oil leaks everywhere. When we installed it and finished it off it was running terrible (on odd bank) and we werent sure why... P0304. We went after # 4 no coil operation. Checked fuses power supply etc. Found it was the whole bank out. I figured I would google it ( yeah right! Who else has had this problem...nobody) Your video popped right up. It saved me hours of diag time. Went right to it found a broken wire, fixed it, cleaned and tightened the ground....Done! Thank You for putting this out. When you dont have a scanner or wire schematics life can suck. You helped me avoid the suck.

Not sure if it will solve my problem, but this this is the best repair video i have ever watched. Kudos

Good morning! thank you for this video it really helped me out my truck was doing the same thing it's running smoothly now, have a bless an awesome day

i love how you said you will choose to have a great day! Ur a awesome mechanic!

Best video I’ve watched. Honest man that truly wants to help. Subscribed!

Thanks for the video. You helped me change out a bank 1 upstream on my 6.0

Man I love this dudes whole vibe!! Keep up the good work

I would use your shop if it wasn't such a drive...do appreciate your advice.Knowledge through experience is unbeatable.

Tim you rock ! Much love all the way from Cincinnati Oh

Just wanted to say Thank You!! Very helpful. 👍🏽

Wife got her 2001 Chevy Silverado from her dad... whenever it is cold there was a rough idle etc and sometimes would cut off. Changes plugs and wires...fuel pump and filter.. alternator and battery.. so I let her drive my Yukon XL until I got the Chevy straight..scanned it and got the codes...was told to clean the injectors and to change the coil packs.. done...still the same problem so finally ended up getting the O2 sensor...bank 1 sensor 1. They gave me the aftermarket one..had to go back and they had 1 original fit remaining. She seems to be running fine now but I'll know in the morning when time to crank up. Thanks for the video.. really helped me. I pray this is the fix

That was awesome I learned something I have a Yukon 2000 similar as what you're doing to it now thank you I love it your video

I had an 05 z71, had a po300. I didn’t have a scanner so just checked the plugs, the whole passenger side bank were fouled. Dropped the y pipe and the passenger side cat was smoked. I know on those model years the piston rings take a shit and they consume a lot of oil, it always ends up smoking the cats. Knocked out the cats and it ran great. And that was after I took it to a shop and they wanted to replace my cam lol. Needless to say I got my money back from them because they misdiagnosed it. Good video

"The best videos on RU-vid". ✊ Rock on, brother, rock on.

Reminds me of my dad they way you work and explain and talk, and thanks for the video, I never knew o2 sensor shows misfire code. 🙏

"The hardest part of automotive repair is not swearing"? I've always told my wife that swearing was a requirement for auto repair & if you didn't swear then you probably did it wrong.

Great video! Helped a lot!

Awesome work man!!!

Thanks for posting a great video

Lol I just came for the best videos on the internet, but the info is appreciated 😄👍

Great video Tim, keep up the awesomeness'!!!!!!!!!!!!!!

Love to come to Alaska and see you and have a beer, thanks for your knowledge

Still relevant. Glad I found this video today.

An awesome great video as always. I'm sorry I was so long getting to this video. Happy Mothers Day To You and all The Mothers In Your Family. God Bless You All. Thanks for sharing your videos.

Always great videos. Stay well sir.

Great job. Thanks for being considerate enough to share your time making the video to help everyone. 👍 I'll definitely check that data when I'm checking my 03. Those sensors aren't super expensive but sure can cause headaches. Mine has the same dtc at 77k miles

Excellent video. Thanks for sharing!

Thxs Tim always enjoy your work..

40 seconds in, I clicked like and I subscribed. Sometimes you can just tell when someone knows what they're talking about just by how they talk about simple things

Hey Tim . For a 2005 model truck the # is 2131702 , 12587785 pre-converter and 2131699 , 12576131 downstream sensor . So , I came up with different numbers from the one you took off that truck no matter what years I searched .

Very helpful my friend thanks for the info

Great video! I did notice that the Bank 1 downstream O2 was switching like you may have a bad converter.

Thanks for sharing Dir👍👍 very helpful‼️🤠

Awesome video very helpful. Thank you for your time it is much appreciated 👍🏻

Nice demo, the wrong sensor killed itself by asking for excessive fuel. Hopefully the cat survived. You could have shown off by demonstrating the fuel trim correction after the fix. I always try to think of what else could do this to one bank, the pattern was very specific.

Thanks for the video. Turns out my 07 silverado 4.3 o2 sensor b2s2 bad voltage and barely moving

Nice video Tim. I hope all is well

Good diagnosis and fix !

Here’s one for you my 03 Silverado had the po300 code. I changed plugs wires and a bunch of other things and still multiple misfires. After checking the serpentine belt it was a little loose due to the tensioner. After that was replaced it was like a new vehicle!

Awesome Tim, as usual.....👌

Thanks pal... saved me a bundle of headaches!! Wade

Great video, hopefully this will solve the problem!

I just checked mine getting cyl 4 misfire and all 3 o2s appears to work but one sit and moves between .94/.93 so this helps greatly I'm just gonna replace them all at once. Thanks man your awesome..

Thanks, this video content is really handy.

You need a magnet mount for your camera. Thanks great video. Wish I was in your town I would give you too much money to beat some of the rust off the bottom of my truck.

Thanks For Your help , Awesome Tips , You Are Amazing helper Brotha.

Bro you intro got me.. vids awesome

I’m here to watch the best videos on YT and I just so happen to have this P0300 code on my truck. What a coincidence.

I'm here to watch the best videos 👍👍

Just like you I had a P0300 so I dug into my 2010 Suburban 5.3L and found out the owner before me had installed wrong parts on the truck. They had ACdelco 6 spark plugs incorrectly gapped and copper when it should have been iridium plugs. I put the spec ones in with new wires and now no misfire.

Great video. Exact problem with a 2004 Silverado 2500HD.

Hey Car Dr. Tim, I Have a 02 trailblazer that hat the p0300 / p0304 code misfire multiple cyl,i changed a coil pack in cyl 4, and vala fixed,i am wondering though if my 02 sensors are going bad to get that p0300 code? the code never came back..

and you reach...and you burn your hand 😅🤣 DOC your funny...it hurts buddy... i started using finger cut globes because that...it hurts buddy...your videos are so entertaining and fun to watch....stay safe buddy.... 👋from phx AZ

Great job.

My 06 gmc sierra when in park or neutral the rpm idle to 2000k and gets stuck on it until I press the break pedal any ideas why it’s doing this and what I can do to fix it?

Thanks for sharing 👍👍

It is one of the best channels.

Great videos real professional in the shop am hit the subscribe button now thanks

Great video.

Gracias por el video 🙏

Thank you now I get to buy my dream truck and willl be able to easily fix it

Great video helped me out a lot being a female mechanic sometimes when I ask questions I just get looked at like I'm stupid yet that is not the case but I am always expected to give my knowledge when they need it and I tend to fix more problems in the shop then some of the older balding fat guys lol anyway keep up the great work I really appreciate your videos you rock

Can you please tell me what the voltage should be on a 98 Yukon 5.7l on the o2 sensor.

You rock broski!

Ford “Exploder”. A buddy of mine had an Exploder that he called his this term. I had never heard that before he used it one day.

Can a faulty CMP sensor be the reason for my P0206 & P0306? NOID light won’t light on #6 connector....the wires look fine and are testing the proper voltage....so it’s either the ECU or maybe the CMP. I’m trying to find a cut and dry answer to my question. CAN A FAULTY CMP sensor cause only one injector from pulsing? Or would it cause all of them to act up? Please any information is appreciated

He said bong. 420 time. You are the man.

Tim I might have suggested pulling bank 2 o/2 just to see if it was or wasn’t the right one before tightening it .

Thanks a bunch!

Thank you bro !! Your great !!!!

😂 thanks for the advice and the laughs

Thanks for the video . I had the same problem and it ended to be the cat. Top of the cat got broken and the powder filled up the cones so I had back pressure. I had missfire on 2,4,6 only .

I have a code p0300. I suspected O2 but my exhaust sounds loud until it warms up. If my exhaust manifold is cracked would it cause the O2 to throw a code until the manifold heated up enough to close up gap?

Your O2 sensors control your air/fuel ratio. If you have bad sensors your vehicle will create a "lean" condition which makes your vehicle add more fuel resulting in poor/rough idle and drastically lower your fuel economy. Not to mention you can burn out a valve or destroy your catalytic converters because they are catching all that unburnt fuel from the vehicle increasing fuel to balance what it thinks is a "lean" condition. Clean O2 sensors, Mass Air Flow Sensor, Idle Air Control Valve, and Manifold Air Pressure Sensor (if it's equipped) are a absolute must to keep that engine healthy and happy.

Thank for showing me I had that p0300 and it was bank 1 sensor 2 the tip was gone.

Nice video brother

Hi great videos thank you I have a 99 tahoe with a real rough idle to the point where it almost stalls,would it be spark plugs the code said it cyl.4 misfire could that be a number of issues?

Love the video and the amount of detail you provide! Thank you! Too bad you don't have a pair of those "Google Glasses" to record the videos with. I'm pretty sure they're no longer available due to security issues and liability for Google. You did a great job of recording none the less! Most videos I see don't have nearly as much detail as yours does.

What’s the name of that scan tool that you have

I have a 01 2500 HD with a 6 liter it has no blow by I change a PVC valve it doesn't seem to be smoking when they're driving up but when I was Towing my RV and I came to a complete stop it started blowing a lot of smoke out the exhaust he uses a quart of oil every 750 miles I'm seriously confused it runs too good to have bad rings and it has no blow-by any ideas what it could be

Good job.

I have a 02 chevy silverado 5.3 vortec with the p0300 code light on and I don't know what could it be I have had the spark plug wires and spark plugs replaced 6 months ago so I would doubt that's the issue any help would be greatly appreciated.

You have provoked thoughts inside of my head. Im going to go and have a great day now. Have a like and rest assured knowing im gonna check my trucks O2 sensor readouts in the morning

Yes you do love to help. I've seen it first hand.

Just found you. Thank you so much. New sub

I'm getting a b1517 code on a 09 Silverado also has air bag light on but my snap on scanner won't access the air bags I get a check to make sure key is on message but I can access other BCM fiction if you could help be much appreciated a starting point maybe

Thx will check this on mine 2011 avalanche

Thanks good stuff

Did you get the cow feed? I keep hearing their bell ringing. Great video with great laughs. Keep up the great work.

so i have a multiple misfire and b2s1 o2 code. the upstream passenger side sensor could cause the misfires? not sure if the misfires are on the same bank. i should have wrote them down when looking at the scan tool

Hey Tim! You should one day in the future cover P2195 codes on Ford/Mercury make and models and how to properly diagnose and repair!

I have the same issue with my 02 suburban, getting bank 1 sensor 1. Have tried 4 different sensors from the parts store and still getting the code and rough idles.. Any ideas? Throwing P0300, P001B and the same 02 sensors codes..

Great FN video!!!!!!

Nice diag & repair Tim! Yea they don't work so well when they're clogged up.

Thanks man!