2015 Chevy Express Intermittent Misfire - Injector Circuit Codes [Part 1]

[@martinrubenstein7943]

What a moving story about Rafael Venezuela - I do hope I have spelt it correctly. And how lovely of his daughter to write to you and tell you the difference you made to her father’s life. That’s something you’ll always be able to fall back on, on those occasions when you spill your coffee all over the car, and the new ECU doesn’t fix it, and you wonder why you ever became an auto diagnostician. It’s a wonderful, moving story, and kind of you to let us all in on it. I think every one of us can relate to it. Thank you so much, Paul.

[@ScannerDanner]

😀 my man. You must be a premium member 😊 to be mentioning spilled coffee and a bad call. Thank you so much! Thanks for the encouragement here on YT too

[@martinrubenstein7943]

@@ScannerDanner Yes, indeed, Paul; I’m a long-standing Premium member, and proud to be so! The stuff I’ve learned - theory and practice, and the confidence I have gained to apply that knowledge - is worth at least a thousand times the cost of Premium membership. And I’m just a hobbyist! I studied engineering at university and later took an Open University module in digital and analogue electronics, but it’s only since I became a Premium member that the fundamentals really started to make sense.

[@toddandamber9769]

@@ScannerDannerWas wondering what shop info systems like all-data pro-demand, Etc you recommendand can they be added to your Autel ultra?

[@LynxStarAuto]

@@toddandamber9769 Autel now has Motor built in with the cost of the yearly subscription. Motor is pretty good, but at times lacks content on some vehicles/manufacturers.

[@toddandamber9769]

@@LynxStarAuto so always good to have prodemand or alldata as a back up I guess

[@stephenmarshall5302]

Lump in my throat here. I can relate, I lost my brother in 21 and while I was hiding from the world I looked forward to these videos and still do. You know how I feel no need to harp on but that's an amazing story.

[@ScannerDanner]

I'm so sorry Stephen

[@onemechca]

What a generous human you are Paul. This world needs more people like you. God bless you and the SD community.

[@herrkiwi3110]

I can so relate to what she said , I wish I'd had you as my teacher when I was 16 and struggling through my apprenticeship and like you given stupid books and struggling to understand why I need to know about how hall effects are made but nothing about how to test them on the car etc. You give me something to look forward to when I watch your videos and I love the fact you are such a genuine honest caring person and take time out of your busy life to produce these for us. I thank you sir from the bottom of my heart.

[@smartnwogu8316]

The most valuable gift I've been given came from Paul... I was gifted a voucher, with it I got myself some tool ... Thanks to SD, he's a great teacher and philanthropist

[@billybunter6659]

When i started on my own vehicles back in 2013 i hadn't got a clue about OBD2,what's ODD2,oxygen sensor?,Map sensor?,Maf sensor?,trouble codes ?,but, i was willing to learn and i learn't so much from you,i used to watch you in the classroom teaching your students and was fascinated by it all i even became a premium member for a while,oh yeah forgot about fuel trims couldn't get me head around that one for some time but eventually the penny dropped. The message you read out is so true,you draw people towards you becuase you are a genuine guy 🙏.

[@xerxes456]

you help people a lot direct and indirectly I can help someone and are helping who could not afford to have a car if I had not gotten help from you to learn diagnostic skills to repair cars, so you help poor people to have freedom and easier life to afford an old car thanks Caleb and Danners brothers for your work

[@billpawelczyk5855]

I try to learn something everyday while I watch some of your videos and I do I work on cars all the time

[@montehyler]

In addition to all the great "how to fix it" info you give us via your videos, you are one of the genuinely good guys here on KZbin! I am honored to know you and count you as a friend, even if it is just virtually! 🙂

[@dans_Learning_Curve]

Thanks for your generosity and sharing your faith! I'm with you all the way! Just wanted to share what I wrote to you so everyone can read it. "Hey Paul, just wanted you to know that I was able to teach my brother who's a parts changer how to test and make sure the sensor has power and ground before replacing the CPM. This is all due to your and other KZbin creators. Thanks 👍" Thanks for what you do!

[@dharley189]

Your faith and honest approach to diagnosing intermittent problems as well as owner unable to give you any history is refreshing. Recording the mistakes rather than editing them out is another display of your integrity on that PT Loser door switch. We have all been there multiple times.

[@catalaorlando]

I do not know why i was not getting your site, i missed you i am subscribed. You are the best keep the good work. We need people like you. Thank you!

[@achap3604]

Bro u have no idea how much u help with teaching what u know. I can’t afford a lot right now so I always resort to u tube in help me learn how to diagnose. Thank u and keep chalices man God Bless

[@terrencecarter27]

I'm the same way learning from you is an honor. I've a play list of your videos. Thank you very much.

[@freeride202]

I always refer to OE wiring diagrams for connector location. I find the redrawn color diagrams tend not to show inline connectors. Good video as always Paul!

[@mikesautomotivediagnostics8080]

I had the same issue on a 2008 Buick Enclave, I scoped both injector and coil powers. When the injectors dropped out, so did the coils, but only set the injector codes. I found that the screws that held the connectors to the bottom of the fuse box were stripped. I ended up putting cardboard underneath of the connectors then snapped in the fuse box and it cured the issue. That was several months ago. By the way, this is my wife's car.

[@greatwhitehunter420]

Wow so cool that young woman....I'm sure her dad is PROUD.Danner your the man im sure she will be grateful for all the info &help you provide

[@maryannmoran-smyth3453]

Double thumbs up on this episode Danner, Great human relations content as well as technical content. Makes me feel better in a spiritual way that you’re a man of God… Keep on rockin……

[@bartscave]

Caleb’s paying attention! He nailed it when he said that it had to be back near the fuse box since the wires all split from there.

[@AgustinCesar]

Ramdomly watching SD, and suddenly hearing he has Venezuelan friends. A good "Arepa con Queso" to you Sir. Respect.

[@TermoneenyCC]

I find Its so hard to charge customers for diagnostic's when your not sure of what the problem is, but your sure what the problem isn't. 35 years it the trade has hardened me be tough and you need to believe in yourself, you have made the right decision, and stick to it.

[@billziegmond4943]

Paul you Erik O Ivan PHD Cuba don't know how much you contribute to us. I a blessed to have a good job in computer I.T. All your guidance allows me to help Veterans and people on fixed incomes. To fix their cars when they can't afford to take it to a mechanic. They pay for the parts only. My time is free. They know I am not as fast the aforementioned group. but also know I will try my best and not be a part changer. Thanks for all you do.

[@Dario0707]

We are here for the knowledge.

[@JaySosaNY]

It is awesome that you did that for that woman you could have been a typical businessman and said sorry about your luck but you have to pay to many of us in or around this field get a bad wrap because of a few bad apples

[@ring-and-run]

Awesome intro! Thanks for all you do, tenacity, accuracy, honesty and kindness. I aspire to be as thorough as you, after thirty years in the automotive repair business, every day brings on a new set of challenges, understanding, learning, and of course, humility.

[@kc360awareness]

Props to you Paul, for being a caring believer before being a mechanic. You just showed us your true hearts priority. John 13:35 By this shall all men know that ye are my disciples, if ye have love one to another.

[@alanw5879]

Awesome story... Ive highly appreciated the messages once and awhile, the personal help.

[@chrisruth2040]

Thanks for sharing knowledge and compassion heart . God Bless you and your family

[@rexluongo6470]

Love your new videos, lots of sirens and horn honking. Sounds like Dallas Tx.

[@Hybriddiag]

Brother paul.you dont even know how you inspired people by you honest legit work.i am on other side of world learning from you sma and phad oz alad and other guys work as they always mention you in their videos.its a blessing for you to be a inspiration for so many.cheers stay blessed

[@ScannerDanner]

Thank you so much!

[@waqasazmat81]

Technicians/Teachers like you made me stay in this field, after graduating high school everyone told me do not get into automotive field because of how mechanics are and its cut throat field no one is going to teach you. But people like you proved them wrong. Thanks Paul. By the way that link you referred to (3:43) I do not see it. :)

[@ScannerDanner]

Oh shoot, I forgot to like it! Looking now

[@ScannerDanner]

Link to video mentioned with a bad O2 sensor causing misfires on one bank kzbin.info/www/bejne/fmfPimdoqpZsjK8

[@76089randy]

One of the happiest times of my day is getting to learn from you. I enjoy and look forward to each and every video. Thank you for what you do man

[@johnz8210]

I don't know about a 2015, but older ones of those vans had a problem with the engine harness rubbing through on the left front upper control arm mounting bracket.

[@herbertwatson5101]

Got to buy this man's book wish I could have went to Rosedale for my tech training labscope training especially

[@macknumber9]

You are more than just a great mechanic and teacher Paul. You are a great human being. God Bless you and your family.

[@DJ-tn7vj]

Man SD you really have assist alot of us with your channel. Thanks again

[@nelsonnarciso1791]

Your a inspiration to many. Not just by teach us great working diagnostic ways. But also life skills and your a good person I follow you on Facebook and your personal account. I'm glad i get to share your journey in life. My son Roman is autistic and we sit together at bed time and love watching your videos. For some reason yoj keep him calm. Maybe you can give my boy Roman a shout on one of your videos that be amazing. Thanks for all your love my brorher.

[@ScannerDanner]

Make sure you message me on FB about this and I will definitively mention his name in a video!! God bless you my friend

[@nelsonnarciso1791]

@@ScannerDanner for sure that be so awesome.

[@Shirkatron]

I hate working for free too, but there have been times that I didn’t; but those rare occasions. Last time I let someone go the came came in for an intermittent check engine light, P0300. Ran the basics in 20 minutes. Unsold brakes Explained to the customer the situation that the care has great history, everything is new, and gave them a form to fill out next time the check engine light appears. I further explained that if I continue diag I will charge for my time and the chances of finding something is slim. Customer returned two days later and I identified the problem. Looking at the worksheet I gave her turned out the boyfriend was using a OBD2 data logger for his job. Always think outside the box I did lose diag time but I won a customer for life. She has since brought all her cars to my shop and only trusts my judgment.

[@AdelJeffreyJeffreysAuto]

I learned from you so much brother ....god bliss you.

[@salvadorgutierrezr5914]

Happy Sunday and thanks for teaching Scanner Danner and son Caleb , God bless you and your family for all your time and teaching us ✋✌️✌️✌️✌️✌️

[@robertlahman8263]

I love your youtube teaching

[@scientist100]

I love these stories; keep up the great work.

[@royalblood5611]

May he rest in peace Cathy 🙏🕊,may God bless you,your dad and your family, 🙌 🙏 ❤ take care mam,wish you all the best..

[@isalmankhan1]

Amazing heart touching story😍 I'm sure there are millions of stories like this (including myself), who all benefitted from your KZbin channel free lectures & Premium membership😍 Can't thank you enough SD for all this great work & support❤ Special Thanks to Caleb & James Danner👍 Stay Blessed Danner Family❤

[@صلاحالحراصي-غ1ض]

Mr Paul I'm like Kathy I'm from Oman (near Dubai) 🇴🇲 I'm learning from you sir, I bought your book and becomes addicted to your channels.

[@ScannerDanner]

Welcome from Oman! And thank you very much.

[@swager714]

Huge fan been watching for years. I have worked on those vans before and I have seen the injector harness rub threw and ground on the block in the rear of the engine (unfortunately under the dog house)

[@Fitbmxer1991]

I noticed both times you had voltage spikes you was turning the wheel left, maybe a wiring harness near the steering shaft or in the ignition wiring to the key and tumbler? Just a thought buddy

[@cesarjonastello15]

You are a Blessing.! Thank you for Preaching Jusus in your life and what you love to do.

[@ScannerDanner]

I appreciate that my friend

[@Swatson0218]

I work at a GM dealership and had one of these with the same exact codes on bank one and it was a constant dead misfire on 1,3,5,7 connected a head light bulb to the power feed and it would light it nice and bright. Fuse box fixed it though

[@nabskikda3590]

Thanks a lot danner you are the best man I learnt a lot from you and still learning ,big thank you from algeria 🇩🇿

[@robertnicholson8054]

Great video as normal you also need a ground. Although supply cables joints good how's the return neutral. Your pickup is common and your not using the earth the injectors are using. I've had a loose bolt chassis bolt worked ok till drove rough roads vibrates loose. Was hard to find hope find in part 2.

[@cbg1584]

Having this same issue on my express.. random misfire but only when going above 40 mph. I don't really feel any misfire, CEL just flashes if I start to decelerate. Can't wait until your next vid!

[@leonardodavinci303]

Hmm, weak battery/charging system could be contributing to this problem. Thanks for the moving intro.

[@stevenstanil3378]

can't lose with an attitude of gratitude !

[@reallone5]

Hey paul I have worked on dozens of those gm vans and had that exact problem around a dozen times and every time I monitored the power feed to the injectors and as it gets hot I would lose voltage . The cause was a bad solder joint in fuse box . I dismantled one box and I could see a lose pin on board where the solder was not holding and failed When hot . Hope it helps

[@leotech93]

I agree!!!!

[@danielmusat597]

I wanted to advise you to look along the wires to the injectors as, if one of them shorts to ground, all will lose power and the code will appear. The fuse will also blow or the pins will become loose if the short is very short (in time) and the fuse doesn't have time to blow but the pins get melted a bit. Now that I've seen the end of the video I understand there must be something else. Nice video anyway. I waited for one like this for a long time already. Cheers!

[@dassme1]

I had this issue come up on a 5.3 suburban 2008 . Had a bad ground wire on the back of the head

[@DANNYN224]

As soon you took that fuse out the fuse box and put it back in all those codes are coming back that had my mind thinking as a fuse box or wiring problem we have alot of these work vans where I work at and that's why we see a fuse box laying around inside their good work vans

[@jackiemay9471]

you got my eyes leaking at the start you done very nice thing for long time subscriber s daughter big thumbs up mr paul danner well done calebs question reminds me of someone have said right if you change a part and the fault is not fixed what part would look at next check that part before replacing any parts

[@chrisduran8692]

So funny I had a 2016 Express with similar issues in the shop, I wonder if my fix was the same as yours....;)

[@harryhanstein7630]

Having the same issue with a 2016 4500 Express School Bus, replaced the fuse box and problem was fixed, thanks for the info. I must add our local Chevrolet dealer had it in stock .

[@ScannerDanner]

Awesome, thanks!

[@donniejohnson7499]

Well said. I agree 💯 percent. Intermittent problems can be a real pain.

[@moecron9832]

I love you talking about God.

[@markhollins2190]

I fix one a few years ago was the fuse box

[@bocolumbine2931]

To God be the glory. May our God continue to bless you so that you may be a blessing. Keep your eyes on Jesus brother.

[@ScannerDanner]

Hey Bo! Hope all is well for you my brother and thank you!

[@TheChaszb]

Don't know if you have found the issue but I had one that come in with the Samy problem. Found the sodder on the fuse pin to be corroded. Orderd new fuse box.

[@ScannerDanner]

yes sir, check out part 2!

[@primefightingchampions4086]

Yes sir Thank You Paul for everything your knowledge is much appreciated. As a man, father thanks brother 💯

[@williegillie5712]

Well at least you got a chance to see what’s causing the problem. I think it’s too much of a coincidence that scope reacted to the gear shifter. I think your getting close Paul

[@James-fs4rn]

👍 much respect and appreciation Paul!

[@vincegayle3664]

So I had a case earlyer this with the same kinda van. I ran the same test then removed the fuze box and opened it and it was burned inside the fuze box same fault code but mine was not intermittent so sold a fuze box then found the tsbs on this problem

[@brianmason8400]

Those intermittents definitely do SUCK!!!! Had an 07-ish I think f150 customer had to bring back 4or 5 time for no crank. Dash, abs, and pcm we're all on the same COM lines. Finally acted up long enough, found the pcm dropping out of the com circuit. The the Cust didn't want to believe us and wanted a second opinion from somewhere else. Have fun son !

[@LynxStarAuto]

I remember that name in the comments section for sure! I think he may have even been a premium member from your initial service through KZbin in the early days.

[@northernpatriot9078]

i started watching scanner danner when i was homeless too thank you

[@Pablo_Automotive]

Great job team Danner 👌☺🔧

[@DANNYN224]

Great video

[@andywrites2141]

Do all 8 injectors share the same ground, or is that irrelevant?

[@ScannerDanner]

Each injector is individually grounded by the ECM and then would use a main ECM ground after that. So with a faulty main ECM ground, we would be having more than just one bank of injector issues. Make sense? Great question

[@calimesacox]

I am in tiers.... God bless you 🙏

[@tomsemer7441]

G1 is at the same tie point for fuse 65 that could possibly be part of the problem. If it was touching, it could draw down G2 and G3 circuits because all are tied to fuse 65.

[@JoseSanchez-ln2jx]

Second part? I can't wait for it.

[@AlexHernandez-gh3gr]

had an escalade do the same on 2468 side,had a bad coil and 2 bad spark plug wires ,kept blowing fuse to injectors

[@calholli]

I agree with the logic that it's not likely to have the same problem across all 4 separate wires, so it must be upstream from there-- which would be the fuse box/ fuse.

[@tgoodm1]

I always get a few good laughs when watching your videos. 😂

[@ScannerDanner]

I'm glad! Let's have fun while we fix some cars right?

[@DependableAutoTruck]

as fuses get smaller and smaller do you think that the life of them is less than the older larger ones. i would think as the size gets smaller the life could be less.

[@dro2204]

Had a similar problem on that same type of van. But instead of injector codes I had misfires and a coil circuit code. Ended up being the ground on the backside of the engine. Had to take the doghouse off and wiggle the harness to get the fault to happen

[@magrisers]

Paul,l am your subscriber since '11. Just my 2cents. Does this engine have intake cam phasers? As you know phasers run CMPs,CMPs run injectors, you get the rest.Pete, Priority Auto Kemah,TX

[@Geekdiymechanic]

Your comment about charging is a tough one. I have given away a fair amount of time and money due to the fact that I couldn’t find the root cause of an issue.

[@robertfinnerty7201]

You may have a bad motor mount on the drivers side that is allowing the engine to move up when in dirve just enough to cause a bad connection. I had a bad drivers mount on a 2007 Suburban and it was moving the engine ground. I lost my mind figuring it out.

[@jolujo5842]

Great comments from the heart 👍🙏

[@Derek-wd4vt]

Genuine.... God Bless, and thank you for the videos sir.

[@EATSLEEPFARM]

Leaving us with a cliffhanger 😬

[@calholli]

On intermittent stuff like this, once you have ruled out the obvious check points, I usually then go right to checking the harness; not tearing it apart, but just back track the harness as best you can/ use some mirrors and lights, and just look for something obvious. Because many times it can be right there in your face- a wire bending around a sharp corner and worn through, ect. ect.. We've seen it all 1000 times. Don't spend a lot of time on it-- just give it a once over and look for something to jump out at you--- and then move on. Sometimes we can get a habit of sticking with the scanner and diagrams and overlook a simple visual check. I've found that this can save you time more than you might expect.

[@ScannerDanner]

Absolutely 100% spot on my friend

[@alexfitnesstv6669]

i have a 2008 grand prix with a P0300 ive change sparks plugs check all coils for power change mass air flow sensor coils im using is zz performance heavy duty zz wires could that be the problem

[@dans_Learning_Curve]

I was born in Hemet CA! Phill's Probe!

[@Ken-wu6hr]

I’m to the point I’m gonna start charging a hour plus fuel if I need to get fuel. Do you charge for scanning?

[@nancylewis7142]

good info. thank you for this video.

[@rexluongo6470]

Mode 10 on my 06 F250 is blank. I have set and reset the codes many times just in the past couple weeks. Even with MIL codes active, still no mode 10 data. So not sure how reliable that info is????

[@fascistpedant758]

When you don't have much direction to work with on such an intermittent problem, you'd might as well pull and plug all the fuses and relays a few times to eliminate that as the problem. Check any easily accessible pertinent connectors and grounds too. Don't cloud your mind with too much doubt about everything. If the problem persists, you can then start a proper diagnosis with a clearer head. It's not always useful to spend stupid time and money to prove that the problem was just a poor connection at the pin of a relay.

[@irishbob6771]

could the voltage dropping to 6 volts be a high resistance ground downstream or would that blow a fuse? just trying to learn. thanks for the videos.

[@ScannerDanner]

A high resistance ground, as long as it is not located where your voltmeter negative lead is connected, would not lower a supply side voltage reading. Make sense?

[@irishbob6771]

@@ScannerDannerthanks for the reply.

[@domenicnicosia7457]

Thank so much for your uplifting words Christ is the only option I know it not easy been a Christian and working in the motor industry as many of us have used swear words on a daily basis ,but my Christian faith is still with me despite both my parents passing as I said early there is nothing in this world that can compare with our Lord Jesus Christ someone you can trust in theses chaotic times .thank you for your knowledge and dedication to this craft and the great contents

[@ScannerDanner]

Thank you my brother in Christ

[@jolujo5842]

How often would you say a routine O2 sensor change should be done?

[@ScannerDanner]

never unless they code on you, not on todays cars anyway