Chevy Silverado: P0335 CKP case study -Part 2 THE FIX
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- เผยแพร่เมื่อ 14 ต.ค. 2024
- Join me for Part 2 of the Chevy Truck P0335 case study where we cover:
-CKP sensor replacement
-CKP Variation Relearn procedure to prevent erroneous misfires and a false P0300
-Explanation of flat 5V on the CKP signal wire at the PCM
Enjoy!
Impressive you can admit being baffled! It's the fool who thinks he knows all, the wise that's always learning. Most wouldn't post all that was learned, you are a credit to your trade. Great video.
Ivan...good source for information, Eric O. It does makes sense to sync the crank sensor to the cam within the computer. Apparently that "old data" still communicates to the module giving out those fake misfires. Back tot he truck, it's 4 wheel steering which was an option for about $2,200 and Delphi made the components for GM. It looks like they have a Dana 44 front axle housing for the rear as it has the steering spindles and hooked up to that electric motor which is then wired to a sensor that is located on the steering column shaft at the dash. A really nice feature that should really continue to be offered due to the turning advantages it provides for pickup trucks that are crew cabs. It's a very rare truck to have the 4 wheel steering, 4x4 and the 6.0 engine especially in the 1/2 ton which is what the "HD" signifies for weight limits and that year was likely the only year they offered the 4 wheel steering in the 1/2 ton truck as most were 3/4 ton. Sounds nice and quiet under the hood for a 118k engine thanks to the "LS" design from GM.
Great video. I love when you play around with different testing methods/theories. You learn, we learn. Those real thin flexible backprobing pins can be tricky sometimes. Thanks.
Sometimes it's the simple things that can throw you off. Great info on the relearn.
Had the same issue on my silverado. CKP code. replaced it and still had the issue. dug a little deeper and found a broken signal wire to the CKP behind the block. great video! Just need to do the relearn
I have an 03 driving me crazy. Where was that harness break?
Behind the block? Oh sht? Can relearn be done if "no start"?
A great lesson on being very precise with the back probing pin. Great video.
Thanks for watching? Ha,, thanks for making...
Split in boot for vacuum hose connection on fuel pressure regulator is part of what this truck will need fixed soon enough - 14:00 time stamp. I'm going to get a couple just to have. And I wouldn't have been reminded to do so without this video, so thank you.
Great vid Ivan, a good lesson for all, check ,double check and check again. Can't tell you how many times I have been on the wrong pin. mine is mostly due to bad eye sight. thanks for your time and effort.
Good find on the backprobing...I've run into this same scenario also. I find that it happens when wires are very close together such as on the PCM. Good video Ivan and nice to see the truck fixed as I'm sure the owner will be happy.
I love your videos! I did a Crankshaft position sensor on my old silverado and chased a random misfire that was never an issue other than the engine light saying in was.
I never knew there a re-learn for the sensor! Great video and learning lesson for me 👍
I believe that engine only uses the cam sensor signal to allow for sequential injector firing. Nice diagnosis and repair video, Ivan.
+wysetech2000 I think with GMs in general the CKP is king. The fact that the truck was running fine and I was getting nothing on the scope should have been a dead giveaway to check the lead connections!! Lesson learned for sure.
You and Mr O need to do more.vids I really enjoy the guys so please do if you guys can!!!!!!
Fantastic trip in diognostics. Ivan there are up to three levels of parts available at GM , there all labeled AC Delco but their all not the part that was put on at the factory. Actually there are late model parts you can never buy from the dealer and their only put on at the factory and never sold retail but the dealer will sell you an aftermarket part - all OEM's do this. If you want a factory part (maybe ) it's at the dealer or you get an aftermarket 2&3rd line sometimes like as in rock auto at a great price LOL. The factory AC Delco CKP was not from onehunglow province in mainland China - ha I like the mainland China bit :) Ok for the probe placement could you use a line tracer to verify the scope lead is in contact with the right wire ?
Interesting . My truck with 5.3 was , having issues pulling my car trailer loaded up hills . done ok pulling until i let off gas to slow down it would run really rough or would stall if i stopped . It ended up being a lazy 02 sensor . and very interesting on the back probing
+wtbm123 Lazy O2 sensor diagnosis coming up next :)
You are wonderful I have had the same problem and found a wire in the sensitive crank separated. Thank you friend from Yemen
Ivan. I'm a 1%'er. :) Great video - loved all of the info. One thing: I would NOT have unplugged that Cam sensor, at the end. Why? Because I'm way too cautious. :) Also called "being Chicken. :) " You have NO fear. Great vid thanks.
A good reason to "pokey-pokey" the wires, as Eric-O would say ;) On a more serious note, that backprobe issue means that we could cause all sorts of havok by backprobing if we accidentally shorted two wires.
Great vid! Another awesome diagnosis!
+Adrian Kingsley-Hughes Good point. I think in this case the backprobe pin can only touch one wire at a time, even though they are so close together...but it blew my mind how easy it was to "cross-probe" on this connector.
Subscriber from south main auto, just subscribed. Great vids
Oh not you didn't!??
You didn't really say poking a hole in the wire might not be a bad thing, did you!?
Don't get me wrong, it's another great video and diagnostic win. 2 thumbs up.
Piercing wires is a 'thing' for me. Being a retired Powertrain engineer, I know that people do it when it is difficult to back probe.
However, Packard Electric engineering states it is not if the wire will fail, it's a matter of when. Moisture and corrosion are such big problems for vehicle wiring, PE goes to extreme measures to protect the copper core.
I know it's tough to get the probe past the weather pack seals. I actually like the thin T-pins for back probing. I recall seeing you use some that are stored in your trusty Micronta multi-meter.
Keep up the great videos.
You right Getting parts it's just like Christmas you even get the bill next month that takes all year to pay off
x job of tracking and understanding data you young guns are impressive there is one thing that helps me. remember when it don.t make sense its probably manmade hence
Hi Ivan,Nice work there. In your Video it sounded like it had a Vacuum leak also? Then I saw what looked like a compromised FPR (fuel regulator)elbow? Did you see it? Take a look at about he 13:53 marker point of the Video.Thanks for sharing your skills with us :)
+karl winter Wow good eye, Karl! Just checked it...a small external crack for now, but might get worse soon. Fuel trims were right on, so maybe it was a bit of P/S or alternator whine?
I noticed that to 🙂
Your videos help me narrow down my problem unfortunately mine started with a camshaft positioning sensor I'm hoping now the reason is not starting is because of my crankshaft sensor unable to get his start so I can't read if there's any new codes
Nice job Ivan. I enjoyed the video's.
Maybe needs a tune up,,could not help but notice the big split in the coil boot. great job on your vids,,thanks.
Man I have learned so .ugh from you ane Eric I feel like I owe you lol same with schrodigers box you guys are amazing thanks for sharing....does an egr need a relearn I have another obd Reade r its a start but doesn't do much except give codes do I need pc software or think pad
This is exactly what my Pontiac solstice GXP is doing
Hello there very interesting video but it looks to me like you my have a hole in the vacuum fitting at the fuel regulator . I would have had to double check my wiring whit a piercing test great video keep it up .
+8power0 Good eye! Yeah I checked it...external crack only for now, but should be replaced soon for sure. In this case poking a few small holes would have been more reliable than the backprobing method lol
Probably a few years late but did you see the potential vacuum leak at the fuel pressure regulator @ 13:58 And a plug for Phils Probes!
ivan I got a 2011 express with the 4.3 P0336 but the crank only drop from 5 to 1 , I check the ground and it look to me is ok , and it have the 5 volt reference, have to keeep checking tomorrow, the cool things of watch your videos is how you use your scanner, nice man,I got a verus miself , but you guys are my best teacher how to get the best of it, thanks
+Felix “felmar38” Martin What is the voltage on the signal wire when you unplug the sensor?
+motoYam82 5 volts
So in your case it looks like a pull-down design, unlike the Silverado in this video. A good sensor should pull that signal all the way down to 0 volts...
+motoYam82 they got me a napa sensor but even if the capture is more clean that the old sensor , stay also from 5 to a little under 1 , I going to spend tomorrow morning to see if I see something weird , thanks ivan
Dang I had no idea GM made the 4.3 V6 all the way into 2014...still using the spider-based injection system! That's like a 30-year production run...wow.
Did you have to reperform the CKP/CMP relearn after disconnecting CMP?Good video!
A common situation with the Chrysler 2.7L V6 is when someone changes the timing chain or water pump to have it off one tooth which will prevent it from starting/running UNLESS you unplug the cam position sensor (which is a good/quick way to test for that plus get the car to another mechanic to get it fixed right).
Keep up the good work. Been a follower since you and Eric made the mitsubishi? (hope I got it right). Thanks.
0:27 Your Lenovo there is also made in China hehe. Great machine I say.
I went back to watch your old videos 😅
@ Storm God I don't know where Google posts the ads...usually you can skip them?
Hi ivan ,
I have a 2011 chevy truck 5.3 since i bought from dealer it has a random misfire with no code till now .i tried every thing can solve the misfire at idle ,checked compression, new wires,plugs,coils,intake gaskets,throttle body , im very desperate i will try to replace the crank position sensor soon. If you have any guide tips for me . Thanks a lot for this vid
You mean you can physically feel the misfire?
+motoYam82 yeah and fuel smell
+Sa Kh and engine running rough with no codes
If it's that bad, it should definitely set some trouble code. Check for "pending" DTC's too. Do you mean the exhaust smells like raw unburned fuel??
Does the Autel do graphing as well? If so, I'd like to see how well it graphs different items, as it's much cheaper to buy then the Snap-on. Great video.
+Joeshu1000 Graphing data is not one of the Autel's strong suites...at all. Neither is saving data. But it's still a great scanner for the $$ and has wider vehicle coverage ('96 and up) than any loaded Snap-On scanner.
Am i the only one that had to watch the 1 minute long commercial(Ad) before the video, hopefully Eric O. never employs commercials.
I have an 04 Dodge Ram 3.7V6 that had the P0335. I dont have all the equipment you have so I replaced the Position sensor. Still have the problem. Would have to do that re learn process to make it go away or should I start looking for a wire fault
Hey Ivan, i did not know you had to do a relearn procedure after replacing the crank sensor. Quick question does the autel 708 have the relearn feature in it. ? .
good video by the way . Thanks
+Carm0083 Yup, the DS708 sure can. Now Eric told me his newer MaxiSys tablet did not have that feature...will have to check back with him on that one.
Really I thought the more expensive one would have more features. Just want to thank you and eric for all hard work and the cool video's. I am learning an ton from you guys. I'm a diy'er and purchased a ds708 about a year ago and I'm still learning how to use it. Just trying to grasp the acronyms Is mind-boggling. I am an old timer, i'm 57 and trying to keep up with the times with working on cars. I was an auto mechanic years ago and still love working on my own cars.However, i am no stranger to electronics. I left mechanics field to go into the communications field and now i install Communication systems for Motorola. You know for police dept., fire dept., ems etc. You never know were your going to end up.:)
It's really cool of you guys to take the time to put up your video's to help guys like me. on behalf of all of us. thanks.
Very cool! Yeah the technology is advancing at an incredible rate for sure. On modern vehicles most driveability problems are caused by failure in the electronic components. Not much you can do without a good scanner, DVOM and scope. Having a background in physics, engineering and circuit design certainly helps too. Thanks for the feedback!
Can you go thru the relearn procedure without a scanner and use a cheap scanner to clear misfire codes? Thanks.
nice fix
03 Silverado 1500 5.3L cranks but won't start, no codes, security light goes out after a second. Changed crankshaft sensor, camshaft sensor, PCM (pcm's were programed to vin), wires&plugs, fuel filter&gas lines, relay and main window/lock switch. No five volts reference at PCM, no ignition pulse. Tried the 30+ minute relearn a few times, I tried to bypass the passlock 2 security but put that back. What next? Replace BCM or tow to dealer? You explain great, what do you suggest? Thanx
Check for a good ground at the ignition coils (black wire) with a test light.
Do you need a scanner to do the relearn? or is that just a procedure that the scanner tells you to follow?
Yes you need a bidirectional scanner 👍
Hey bud new to the channel. I need a little help. I have a 04 silverado 4.3 just swapped it out for the same size motor except it’s from a 08 maybe 07 not sure. Only difference was new motor has two knock sensors rather then the one on the old motor and the crankshaft sensor was a little smaller compared to the old one. Problem I’m having is the new sensor for the 08-07 motor is the wiring isn’t labeled and Ive wired every which way I think 🤔. So my question is would the sensor resistance change even though the motor is the same and what can I do to find the rite way to wire my sensor. Thx.
Get Eric a styles like that for his new toy!
Ivan, Do I need to do a CKP variation relearn If I am changing ti Cam Sensor, 4004 Gmc 2500 6.0L vortec, Fault code P0342
Can't get her in the correct hole ? Thanks for the video.
dude, my truck just started this shit a week ago,and i think this is my fix ,but ?but ?how to do the relearn porceedure with a bosch scan tool?? not sure if i can?
I like that
do you have to do a relearn when you replace distributor ?
yes,.
Hey ivan is there any way to do the relearn without the scope?
+eddie martinez As Scotty Kilmer would say, "you need a fancy OEM-level scan tool!"
I have only a matco md70?
So how can I reset this cam sensor?
One is shorting the other...??
Eric don't seem to have that tester. Don't use parts from China! They may look-alike but they can fail soon after.
yeah i just ordered one for my 05 silverado from gmpartsdirect.com for $70 with shipping. hope its not made in china junk.
jas Get Lisle's wheel stud replacer. It replaces studs easy! EBAY has it.
Dirty back-probers and wire pokers 👍
Dang I am only a 2%er
+Schrodingers Box lol Matt that's close enough :)
Schrodingers Box Eric don't use this tester. Maybe he should! It seems to do more than Snap-on he uses.
1% -er!!