Great video I'm having the same issue and replaced the EGR with no testing, check engine light came back on a week later. Your video is what I need to test properly. You are very knowledgeable, thanks
Wow it worked like a charm cleaned it put it back on and the check engine light went off by itself without me even have to clear the code thanks a bunch Mike from New York 👍🏻
hello Eli, excellent way to approach an EGR problem and any code associated with it and as you mentioned to know the circuit designed if it is ground or power control side is very important in checking any sensor or solenoid. thanks for all your videos they contain good info as I, watch and learn cheers my friend.
*Key on engine off back probe connector on pin 3 sensor ground I have 3.35 volts pin 1egr signal I have 0.30 volts pin 2 vref 5.02 volts pin 6egr Sol control I have 0.11 volts pin 4 ground wire I have .009 volts and this is the third new EGR valve currently have code p0403 which sets quickly what are your thoughts on these readings Eli*
By the looks of your voltage readings, I see that your sensor ground is not within specs, should be less than 0.1V. Looks like you have a harness issue on pin 3 or maybe pcm problem. The next step would be to check the voltage at the pcm and see if you get the same voltage reading of 3.35V
Eli, can you help me. I have a '98 Tahoe with code Po420: Catalyst System Efficiency Below Threshold. What does this mean and what is causing it? Thank you.
a friend recently brought me a 99 Chevy venture, had a egr closed position performance issue, it had been to several shops, to make a 3 week story shorter, so as not to bore you, I discovered that someone had mounted the valve backwards.
Excellent video thank you! I'm running into the same exact problem except I put a brand-new heavy-duty EGR valve in and I'm still experiencing those same symptoms occasional stalling and rough idle at lower RPM's. Any advice?
Make sure your your harness connector doesn't have any spread female pins. Maybe, the characteristics of the New egr valve are not compatible. Its hard to say, without proper diagnostic testing.
By doing a wiggle test on the harness itself while watching the voltage meter for any glitches. Sometimes the female connectors tend to spread open to the point where it does not make a proper connection with the male connector. Always check power and ground on any circuit.
I tested my signal wire (1st one) and got a reading of 3.5 volts slight fluctuations. I also have codes for circuits high and low po405 and po406. How do I address this extra voltage. What would cause this? My engine does not seem to run differently either but code will not go away? Pls help thanks.
Hey Stanley, if I'm not wrong, the EGR Valve for 4.7L should be located in the left rear of the firewall. In other words, left rear driver side. Close to the throttle body.
I replaced my EGR valve then 2 weeks later my Check engine light came back on and the code was the exact same thing the EGR valve code P0404? Could I have gotten a bad replacement part that failed early?
Was it an aftermarket egr replacement ? If so, it's a possibility that it went bad. Another possibility, harness connector issue, spreaded terminals or an electrical issue.
@@EliTheOBDTech Thank you I will check into it, I am replacing the water pump this weekend and While I have it off Im going to replace the EGR valve once again plus the 02 sensors are also showing bad. Might as well getter done while I cranking wrenches. Any suggestions for checking the harness ?
@@johnchapman3225 First thing I would do, check power and ground going to the egr valve. If all checks all good, back probe the signal wire and do a wiggle test to check for any signal dropouts. That will tell you that you may have a spreaded signal terminal or faulty egr sensor. You can visually check the harness connector and compare for any spread terminals.
Hi, My husband's 2007 dodge ram keeps showing that egr code even though we have gotten it replaced about 5 times. For some reason, nobody can fix the issue properly. What should we do because we need this issue fixed asap so we can pass smog.
I would recommend doing voltage checks to determine if it's not a harness issue. I would also check if the egr system is not partially clogged with carbon deposits, especially near the intake manifold.
@@EliTheOBDTech thank you. Do mechanics usually not check those possibilities? I feel I have gone to some incompetent mechanics. Even to the dodge dealership. I'm convinced I won't find a competent mechanic considering all the ones we have gone to.
97 jeep Cherokee sport 4.0 while driving for a while the car stall an have to wait about 30min an it will start again an then it runs good for couple of days an same thing over again what do I check thnku like your vedios
+Simon flores hello Simon, I would start by checking fuel pressure and then performing some voltage checks and some manual test on the EGR. Sounds like fuel pump or EGR valve problem. Good luck, let me know update status.
what it was that the oxygen sensor wires were cut an hitting the drive shaft making it surge an the wire to the nss had bare wires an shorting out seen I replace the post o2 an a new nnswitch had not stall or surge
I have an 04 dodge ram 1500 st 4x4 5.7 , did new egr and pipe . Checked pin 1 and 2 both had 7.48 volts give or take. And pin 3 had 12v last 2 pins were 0 volts , the tpim had a bad connection I found idk if that is still the reason why the check light still is on? Is this correct for volts on those pins?
Liam MacBeth to determine that it's not a fault on the harness you need to do voltage checks by using a voltmeter. during your voltage check, wiggle the harness to see if there is any voltage glitches.
When you are born with a studdering problem, it's not easy, I use it as speech therapy. I don't get offended, I use it as motivation. Thanks for watching.
@@EliTheOBDTech im sorry i wasn't trying to offend. I do have a problem with delivery though. I just asked her why didnt she clean up yesterday jus know "I fukd up" next time ill keep my mouth shut
Great video I'm having the same issue and replaced the EGR with no testing, check engine light came back on a week later. Your video is what I need to test properly. You are very knowledgeable, thanks
Wow it worked like a charm cleaned it put it back on and the check engine light went off by itself without me even have to clear the code thanks a bunch Mike from New York 👍🏻
hello Eli, excellent way to approach an EGR problem and any code associated with it and as you mentioned to know the circuit designed if it is ground or power control side is very important in checking any sensor or solenoid. thanks for all your videos they contain good info as I, watch and learn cheers my friend.
+j georges Thanks for your support, much appreciated.
j georges
Just changed my EGR and bank 1 sensor 2 oxygen sensor and truck runs great now. I thought I had a valve tap. It was making a knocking noise
Thank you for this, hard to find service information for these
Still trying to find specs for the signal wire and resistance of the sensor
awesome video, thank you very much 🙏🏼
Did you ever find out the specs for the signal wire? I believe my signal wire is shorted but can’t find any wire damage
If I do remember right, it should be around 3.5V with key on, engine off
*Key on engine off back probe connector on pin 3 sensor ground I have 3.35 volts pin 1egr signal I have 0.30 volts pin 2 vref 5.02 volts pin 6egr Sol control I have 0.11 volts pin 4 ground wire I have .009 volts and this is the third new EGR valve currently have code p0403 which sets quickly what are your thoughts on these readings Eli*
What kind of vehicle?
By the looks of your voltage readings, I see that your sensor ground is not within specs, should be less than 0.1V. Looks like you have a harness issue on pin 3 or maybe pcm problem. The next step would be to check the voltage at the pcm and see if you get the same voltage reading of 3.35V
Eli, can you help me. I have a '98 Tahoe with code Po420: Catalyst System Efficiency Below Threshold. What does this mean and what is causing it? Thank you.
a friend recently brought me a 99 Chevy venture, had a egr closed position performance issue, it had been to several shops, to make a 3 week story shorter, so as not to bore you, I discovered that someone had mounted the valve backwards.
Bert Cochran wow!!! that shows you that some people don't pay attention or shouldn't fix cars. thanks for sharing
Good job, Very nicely done
Thanks!
Excellent video thank you! I'm running into the same exact problem except I put a brand-new heavy-duty EGR valve in and I'm still experiencing those same symptoms occasional stalling and rough idle at lower RPM's. Any advice?
Make sure your your harness connector doesn't have any spread female pins. Maybe, the characteristics of the New egr valve are not compatible. Its hard to say, without proper diagnostic testing.
How can u tell if it’s the egr valve connector housing or the wiring harness itself that is faulty?
By doing a wiggle test on the harness itself while watching the voltage meter for any glitches. Sometimes the female connectors tend to spread open to the point where it does not make a proper connection with the male connector. Always check power and ground on any circuit.
I tested my signal wire (1st one) and got a reading of 3.5 volts slight fluctuations. I also have codes for circuits high and low po405 and po406. How do I address this extra voltage. What would cause this? My engine does not seem to run differently either but code will not go away? Pls help thanks.
A reading of of 3.5 volts is a good reading for this vehicle. Did you already do a visual inspection on the egr valve's pintle for any carbon build up
Eli TheOBDTech yes replaced the the egr few weeks ago everything seems ok could it be from changing to a cat back exhaust?
Eli TheOBDTech I remember hearing that the code is triggered when a voltage drops below.5 volts my solus scanner said egr has .4 volts.
@@philandfamily9298 it sounds correct, you may have an intermittent connection between the male pins and female connector (harness connector)
Where is the exhaust recerc sensor located on a dodge 4.7 engine?
Hey Stanley, if I'm not wrong, the EGR Valve for 4.7L should be located in the left rear of the firewall. In other words, left rear driver side. Close to the throttle body.
I replaced my EGR valve then 2 weeks later my Check engine light came back on and the code was the exact same thing the EGR valve code P0404? Could I have gotten a bad replacement part that failed early?
Was it an aftermarket egr replacement ? If so, it's a possibility that it went bad. Another possibility, harness connector issue, spreaded terminals or an electrical issue.
@@EliTheOBDTech Thank you I will check into it, I am replacing the water pump this weekend and While I have it off Im going to replace the EGR valve once again plus the 02 sensors are also showing bad. Might as well getter done while I cranking wrenches. Any suggestions for checking the harness ?
@@johnchapman3225 First thing I would do, check power and ground going to the egr valve. If all checks all good, back probe the signal wire and do a wiggle test to check for any signal dropouts. That will tell you that you may have a spreaded signal terminal or faulty egr sensor. You can visually check the harness connector and compare for any spread terminals.
@@EliTheOBDTech Thank you, I will do that much appreciated for the help and advice.
@@johnchapman3225 hey by any chance did you end up finding out what it was ? In experiencing the same issue with my 08 ram 1500
What do I do when I switched the egr an check engine light still on what cool be problem
You need to check power and ground. Check for loose or spreaded female terminals on the harness connector
Hi,
My husband's 2007 dodge ram keeps showing that egr code even though we have gotten it replaced about 5 times. For some reason, nobody can fix the issue properly. What should we do because we need this issue fixed asap so we can pass smog.
I would recommend doing voltage checks to determine if it's not a harness issue. I would also check if the egr system is not partially clogged with carbon deposits, especially near the intake manifold.
@@EliTheOBDTech thank you. Do mechanics usually not check those possibilities? I feel I have gone to some incompetent mechanics. Even to the dodge dealership. I'm convinced I won't find a competent mechanic considering all the ones we have gone to.
@@jessicataylor2859 There is mechanics who are just part changers and do not take time to check for electrical issues.
97 jeep Cherokee sport 4.0 while driving for a while the car stall an have to wait about 30min an it will start again an then it runs good for couple of days an same thing over again what do I check thnku like your vedios
+Simon flores hello Simon, I would start by checking fuel pressure and then performing some voltage checks and some manual test on the EGR. Sounds like fuel pump or EGR valve problem. Good luck, let me know update status.
Did you replace that crank sensor yet?
what it was that the oxygen sensor wires were cut an hitting the drive shaft making it surge an the wire to the nss had bare wires an shorting out seen I replace the post o2 an a new nnswitch had not stall or surge
I have an 04 dodge ram 1500 st 4x4 5.7 , did new egr and pipe . Checked pin 1 and 2 both had 7.48 volts give or take. And pin 3 had 12v last 2 pins were 0 volts , the tpim had a bad connection I found idk if that is still the reason why the check light still is on? Is this correct for volts on those pins?
Both Pins 1 n 2 voltages ⚡are too high. Most likely a bad EGR valve. Secondly, wiring issue.
Pin 2 for sure, should be no more than 5 volts.
Perhaps you may have a TPIM problem that's causing your issue. These TPIMs are notorious to go bad.
@@EliTheOBDTech what is tpim ??
@@RCCRAZYSTUPID Totally Integrated Power Module. It's where all your fuses and relays are loaded under the hood.
will this prevent any vehicle from passing a smog check?
PAUL LIMON yes
How do you know it's not a fault in the harness?
Liam MacBeth to determine that it's not a fault on the harness you need to do voltage checks by using a voltmeter. during your voltage check, wiggle the harness to see if there is any voltage glitches.
Cool thank you , top man.
It says 2002 not 2005.
My 2006 dodge ram 4.7 on the pin 1 it has 4.48, pin 2 5.02, pin 3 has 0.02 , pin 4 0.00, pin 5 has 0.35
Your issue is on pin 1, it should be close to 3.5 volts. You may have faulty egr valve or carbon build up around the pintle.
@@EliTheOBDTech the egr valve is new was installed some weeks ago.
@@luisballesteros219 What brand?
@@EliTheOBDTech unbranded I bought it on ebay.
@@luisballesteros219 That might be your issue. Sometimes it's better to spend a bit extra and get the original
Good vid pls learn how to speak
When you are born with a studdering problem, it's not easy, I use it as speech therapy. I don't get offended, I use it as motivation. Thanks for watching.
@@EliTheOBDTech im sorry i wasn't trying to offend. I do have a problem with delivery though. I just asked her why didnt she clean up yesterday jus know "I fukd up" next time ill keep my mouth shut
@@rodanderson797 No worries Rod, I tend to get those kind of comments from time to time. Have a blessed day.