How to Read a Code on NPR and NQR Without a Computer

[@carlgill5946]

Thanks that's the kind of how to videos I like! Keep up the great work man!

[@thomasbriansavingmoney]

you got it, thank you Carl for watching

[@Dadagie4]

thanks Thomas for the video ... i have the same problem on a canter 3.0 (error 11) ... could you tell me what it refers to?

[@greenstallion3990]

In your amazon link for a Heavy Duty Code Reader, the reader is for 24v, can you recommend a reader for a Isuzu 2003 NPR HD 4HE1? Thank you,. John

[@mikechurch9420]

Hello: i have a 2005 isuzu npr 4hk1 automatic. I believe I have pins missing in my OBD2 port and when I cross 4*11 all i get is a constant steady trans flashing light no breaks in between the flashes.Do you have another way via another set of pins to cross?? also it isnt as steady and slow as youres it flashes fast and contant!

[@noelhasslinger3810]

I have a 2000 npr 4.8...the check trans light flashes after warm and the at/temp light is on all the time...even when cold... and has all the power in the world when it is cold but after it warms up it has a hard time climbing Hills... basically loss of power... Which later on develops into acting like a gas motor that is skipping... pull it over shut it off for a few minutes start it back up it runs fine again... the previous owner changed the transmission in it... in the truck only has 138,000 miles on it

[@rayharkleroad1961]

wondering why when pulling codes manually on 2005 isuzu npr pins 4 and 11 the trans light just flashes non stop with no pause to give you the 2 digit code.

[@David-rj2xr]

ever figure that out? having the same issue

[@keysparco]

Hi there I have a 06 npr that sometimes it does not accelerate on drive or reverse but it does accelerate on park or neutral And sometimes the truck works fine and runs strong The truck was park for two years everything was working fine I drove the truck about 100 miles and now is giving me that problem I have change the filter it had a full thank when I got it I haven’t put any diesel on the tank

[@mattharvey8712]

Bravo......got the pins......what are the pins connect to........cheers

[@773418668]

been looking all over for an answer to Isuzu NPR codes 19-21-35 can you help on some info on them thanks

[@josemiguelmontano7749]

Hi sir. How about if i want to check the flash code for check engine?

[@TibaneIabeta-e8h]

Thank you and I want to know more about any code

[@klmsinc8243]

2005 NPR with 5.2 diesel/ Following your procedure what does a 4 flash code mean?

[@JonNicholas-kw8cx]

Hey Thomas I have a 2001 isuzu npr hd. 4.8l diesel. I am getting codes 19 , 21 ,and 35 can you please tell me what these stand for

[@andrewsoots3562]

I have a 98 NPR it has been is 4 shops the Last was a Isuzu dealer they can not fix my problem of the trans. It started when we did some welding on the truck. afterward it would not shift out of 3rd gear into 4 unless you let up off the accelerator. they told me they did not know how to work on a truck that was this old. Any suggestions ? We need this truck . thanks in advance Andrew.

[@justingarver6056]

Will this same code reading work even on a gas engine I've got a box truck NPR gas-powered and it constantly keeps going into limp mode so I'm thinking it has to do with the computer because the throttle body has already been replaced replacing the throttle body did fix it but only for a couple and then it started going into limp mode again

[@javiersernan9310]

thanks for sharing your knowledge. I have a Nissan UD 1300 SERIES, Diesel, 2007, with a 450-43LE transmission, I CAN'T pull codes out of it! the OBD connector has only THREE wires in it and about four loose separated wires as follows: purple white E tag, black wire with another wire light blue with with yellow traces attached A tag, sea water blue color wire B tag, Red with blue traces wire with ILL tag, and electric blue wire with IGN tag ! please let me know if You could pull codes out of it! thank You very much! for your cooperation! God bless You!

[@thomasbriansavingmoney]

i use gears. the info you want will be almost half way down this pdf. thanks for watching. www.gearsmagazine.com/resources/issues/130723851479034000.pdf

[@cristiansilva7311]

Hi Thomas, I'm thinking about buying a 2007 isuzu npr 5.2, engine and transmission have been replaced but the dash has aa flashing check trans light while the truck is on and while driving. Owner said it has been doing that since transmission was replaced. No check engine light but I tried connecting my obd scanner to check for codes but it will not connect to the truck for some reason. Any idea what might be the problem here?

[@shawndooley7369]

I know this is a older video. But I can’t find out what the codes mean. Can you list the transmission codes or seen me a link. Appreciate the help. I looked everywhere.

[@SG-vc3wb]

Thanks Thomas...Great info...I will try this out.

[@thomasbriansavingmoney]

perfect thanks for watching

[@TT-cv7rx]

Great video.

[@mubirukadiri4632]

Here I have 2006 Isuzu forward without an obd connector. How to retrieve codes because it has a check engine light and no power. Thanks

[@jotegg1276]

there is not flash to let you know its going to flash. 2 flashes one right after the next. first flash is 1 , quickly followed by second flash which is 1 also. That is probably to signify that its communicating with ECM. If any codes would be after that. There is a pause between codes longer that the pause between code digits.

[@michaelmcanally256]

I have a 99 Isuzu NPR Gas, Was on the way to do a delivery and noticed the service engine light came on. Shut er down to make the delivery. When I tried to restart the truck All I got was a crank with a no start. Since then I have been having to bypass the fuel pump relay to get it to start after about 6 cranks it reluctantly starts and runs fine till I shut it down. Any thoughts ? I will try the code video you posted above. Thanks in advance. I'v had this truck to several different shops with no success. Nobody around here can help me. The tow bills are killing me!

[@GeovaniEspinoza-]

Hello I got same problem you get fix

[@joshuandlovu9701]

Hi Thomas My truck isuzu npr 250 alternator light not coming on dashboard and not starting it just cranks hiw can i rectify it thanks

[@gaizizy1894]

have any videos of isuzu npr crank shaft jammed?

[@efrenpantojr4949]

Can I get service manual of isuzu 4hl1 2006 model. And wiring diagram

[@tuongrang20]

Hi Brian, how are you? Thank you for your video and I have code 11 first and then 22 on my 2007 GMC w4500. Can you help on how to resolve these issues? Thank you in advance. T.

[@josecarrillo8768]

Hi Thomas, I have a question on my 1996 isuzu pnr I'm confused with the ttrans light, light is blinking twice pause and blinking 5 times what's that's mean ? I hope can help me to figure out, thanks

[@cygiddy]

Great video 👌. Need some help troubleshooting non starting 2005 npr that's has power. Thanks

[@ianlewis2435]

Hey Thomas I'm not getting no engine check light also no power at the diagnostic socket can you help..I have the 2000 isuzu npr66.

[@cuongtran-ty1te]

Hey Thomas hows it going ? I hope good. Question I am having trouble with my 2012 npr. It has a glow plug controller and dpf filter. I replaced the controller and cleaned out the filter myself. I used gasoline at first and pressure wash the filter afterward. Now the DEF light is on and some sensor with two hoses going in/out of it. I replaced it but not the def since it clean and full. Problem I am having it's not letting me clear the codes. Still stuck at 5pmh

[@josefuentes7886]

Aye i have a 2003 isuzu npr, but identification lights, 5 ones on the cab are not turning on, but the rest of the lights are. Do you know if its a fuse or what can it be. ?

[@hkirk1984]

Do you know of this will work on the 2007 mitsubisgi fuso also?

[@marktrauth1315]

Thanks I never new this. I think I’m get code 77 and 99 but I cant find what these mean

[@joelcorriveau9286]

Did you ever figure out what they mean? I have similar issue. Thank you

[@RickyChand]

Hey Thomas, thanks for this video, really helpful. To the point and clear. I have a check transmission lights blinking and my transmission isnt shifting above 2nd gear on D. Its not engaging in reverse as well. Ive tried the car computer reader but havnt had much luck. From a bit of Googling, this maybe a master solenoid or a fuse. Can you advise whats the codes for npr 250 2004 automatic..

[@thomasbriansavingmoney]

You're running in limp mode. There is a fuse behind the fuse panel itself. 4 together, and it is number 3. click on my name under the video, i've made a video on it. it is listed as NPR fuel and transmission issues. thanks for watching!

[@williamhercules508]

Hello thomas After i get the codes on my npr 2002 where i can get the codes result

[@tomjensen1275]

My 2008 NPR gas would not crank but has a good battery and no 12Volts at the solenoid when the key was in the crank position. I found that simply removing and replacing fuse 22 in the dash would allow it to crank and start. This has happened twice recently. Do you know what is wrong?

[@kingdrethefirst4989]

what if your truck is a standard truck what would be blinking for the codes ?

[@mgurrola310]

Where is tcm located an 2012 npr. On dash the gear logo flashes. My transmission dont shift. Stays in one gear. Manual says its tcm. Any suggestions? Thanks

[@jackdaniels2657]

I got a 99 Isuzu npr how do I pull codes if it doesn't have obd2 comnecter

[@rickydelivers]

2004 FRR, my mechanics CANT pull my CEL codes, due to the trucks plug-in is damaged. I take it to Isuzu and the are able to pull codes with their reader"using the cigarette lighter" process. both of my mechanics have those expensive code readers, any idea? isuzu charges to much just to pull codes. I would like to have my personal mechanics to it. On a side note, My truck 400k miles drives strong other than the occasional power loss at any speed and sometimes it will stall. My mechanic advised me to pop off the fuse cover, "wiggle" the relays on the dash and it always starts right up and drives normal for most of the day. TIA

[@c50ge]

Is it the same for gas and diesel?

[@yesigomez1927]

Where is that fuse for the tuning lights?

[@paulbarton4639]

Can you help on an 2002 Isuzu FRR? Sevice engine light flashes one time every three seconds. It’s done this every since I bought the truck. No one has been able to pull codes with a scanner or communicate with the ecm. The scanner I have will communicate with ecm, to see live data, but can’t read or clear codes, or read abs module. Will a cheap Actron scanner read generic code and ABS? Thank you for any help or advise.

[@thomasbriansavingmoney]

no, you will need a more expensive one for abs and srs. have you tried removing a battery cable for ten min or more.

[@paulbarton4639]

thomas brian The truck is equipped with a power cut off. It cut off every night.

[@jimford1264]

No scanner will work on the 4.8L/ 4HE1 1996 to 2004 engines. Isuzu has their own scanners so you have to go to them I have spent lots of money on scanners to find out .. I sure wish Thomas Brian would post the code number definitions

[@ProNoobsful]

Hi, i have Isuzu NPR 2004(2005). With 2 errors, 1(long) and 9 flashes 3 times and 4 flash 1 (long). (19 and 41 error code). Can you help me with it? Thx!

[@JoeBett-fl3dc]

Does this procedure apply to 2007 isuzu fvr?

[@mikeelmasry5980]

2001 w5500 glow plug light does not come on at all and it had difficult start on cold mornings, any suggestions?

[@ozl32]

Well Said!! Thank You!!!!!!

[@dansager2945]

I willLet you know what I find I am waiting for my snap on dealer to get me a medium duty scan tool but any help from your end would be awesome thank you

[@thomasbriansavingmoney]

i feel the same way, together we can do this . thanks!

[@jesserobinson6693]

Hi I have a 2003 NQR. I just replaced the transmission with a factory re maned Allison trans and a new radiator to make sure trans cooler is new and flexible trans cooler lines and rear hard trans lines flushed the other lines out that are still good and had actually been replaced before the old trans was slipping. During the whole process we had unhooked the battery. After everything is back together and filled radiator with coolent and transmission with about 4.5 quarts of Allison trans fluid I try to start the truck so I can let it run and get air out of radiator if any and get trans pumping fluid and check/add fluid and get up to temp. Lights come on and check trans light comes on one time and shuts off. Won’t turn over or even make clicking sounds like it is trying. I tried resetting the battery reset that is on the battery and also checked the starter fuse. All good but no dice. Any advice?

[@jesserobinson6693]

When turn the key to the on position is when the Check trans light comes on then goes off. The coil glow plug light comes on for a few seconds line it should. The ABS light was on all the time before I pulled the trans and it is still on and does not turn off.

[@aaronbarneswa]

What about how to get abs codes?

[@johnpaulrevita4044]

Hey Thomas! I have an Isuzu NPR 4HJ1 Engine. The problem is i had to put the idle switch on a high to make the truck run because if i lower it to a normal idling or rpm, it chokes/coughs and.eventually if i am on full stop, the engine dies. But if i keep on switching to high idling it is not fuel efficient, right? What do you think is/are the problems that might contribute to it? Thanks!

[@thomasbriansavingmoney]

sounds like the check valve for fuel return might be stuck closed. or you have a injector stuck open. but yes, i agree with you here.

[@alvinsinanan2958]

@@thomasbriansavingmoney good night... I have an NPR72P with a 4hj1 engine also that had the same problem but now it does not want to start. Were is this fuel return check valve located. Thanks

[@shayneadams2587]

I have code 17 can’t find what it is anywhere Check Trans Flash 1 time stops 7 flashes , Repeats While driving will come on after a while of driving Turn of goes away

[@burtpilon1735]

hello brain I have a question if you can help. I have a 06 GMC w4500 5.2L isuzu engine. Will start and idle but no response when accel pedal pressed. I checked signal on acc pedal and it is respnding with no glitches. I was able to pull a Code P0091 Fuel Pressure Regulator 1 Control Circuit Low. I wanted to ask where is the Reg. located. It seems like a Limp issue. Any help ?

[@JS-pb1sz]

My truck flashes 7 times 13 times in a row. Waited for pause. So not sure if code 7 or 77? Thanks

[@อุดมการเพียร-ต7ฆ]

Thanks for all

[@thomasbriansavingmoney]

Welcome

[@derekfraser6992]

Getting code 19 and either 31 or 41. 4 slow blinks than 1 quick. Where do I find what these mean?

[@flicker85]

What if the plug doesn't have a pin in port 11? 2013 NPR300

[@devenmichael3226]

Anyone know where i can get some fuel injectors for a 2003 isuzu npr diesel?

[@gichigohmonnie6129]

What if the OBD2 is not working what can I do I want to diagnose the car

[@kimhillsong7295]

Thanks Thomas!

[@fathawg2003]

I am getting a code P1904 on my 05 Isuzu diesel. Any idea on help to fix it?

[@dsager25]

i have 2006 w3500 5.2 which is the same as a npr ,im getting the long pause of a check trans light and afetr 9 flashes which would be code 9? and the check eng light on for a p0302

[@thomasbriansavingmoney]

you have a misfire on the number two cylinder. fix that issue and the trans light will clear. the ecm thinks there is a trans issue because of the shaking going on. may just be a bad o ring on the number two injector. please let us know what you find it helps everyone.

[@dansager2945]

thomas brian OK thank you I will fix the misfire and I will let you know I appreciate it very much

[@dansager2945]

thomas brian I fixed similar to misfire and put a new injector in it normal misfire the check trans light is still flashing and when I jump pin 4-11 As per how you said It’s flashing a code 9?

[@thomasbriansavingmoney]

you need to clear the code now for (9) i just got the same exact issue come in yesterday, i will tackle it and get back to you with what i find out. i am about to change all 4 injectors tomorrow and clear that light. i will post my results. and any thing different i need to do.

[@cartergarrett9696]

2005 lefthand drive smoother automatic transmission won't move whenever inge in drive are rev

[@jed2927]

does this work for 2018 NPR HD 5.2 L?

[@samanthaDuplessis-ce3mc]

Where would i get a list of fault codes

[@ernestosantiago4834]

I have an 06 Isuzu 5.2 always going into limp mode.. only that's like 25 miles an hour..

[@norwindaveramirez6089]

Try to clean, the Egr and intake manifold. Then used ecu tools odb 2 error codes, able to reset and clear codes, life FCAR tools for 24v truck etc...

[@robertcoke558]

I have a 06 semi NQR truck always go into dpd limp mode , when I stop an regen Ok, started drive; it come back about hour time

[@robindestrois]

Hey, great video! I did the jumper and get two flashes followed by four short flashes. I think that means code 24? Can you tell me what this means? Truck has been randomly flashing the check trans light. When the check trans light comes on the transmission wont engage, and will only drive in 2 or 1.

[@thomasbriansavingmoney]

your in limp mode when it happens, you got the trans hot. you can disconnect a battery cable for about ten min to clear the code, but i think your gonna need a trans filter and fluid change. make sure you check the trans cooler lines so they are not smashed and working. thanks for watching

[@josedominguez2021]

Thanks Thomas.

[@cbhein17]

Hello i have a 2006 And I'm having transmission problems when my headlights are turned on or my blinker is being used the truck won't shift out of whatever gear it's in and the check trans light comes on. To get going again i simply turn the the truck off as well as the headliggt switch and turn the truck back on and im back to normal. Very frustrating when i get an evening service call. also I should note that my abs light is always on and my dashlights dont work any longer and i have checked all the fuses in and behind the glove and everything is as it should be.....any thoughts?

[@thomasbriansavingmoney]

you are going into limp mode, when you shut it down and restart, it comes out of limp mode, until it reads there is a problem ( sometimes less than 20 min ) and it goes into limp mode again. a number of things can cause this. mos common are, water in the fuel, ( drain the separator ) hot trans fluid , ( change fluid and filter) low fuel pressure ( fuel pump ) low voltage putout of alternator ( new alternator ) thanks for watching.

[@cbhein17]

@@thomasbriansavingmoney ok i will be sure to check the things you mentioned but my question is why does it happen only when the headlight switch is turned on or the blinkers are being used. The daytime running headlights dont cause it and are on at all times which would be ok to use at night if they were brighter but the reason i cant drive at night is that without turning the headlights on i dont have tailights. just brake lights when i stop and the dim daytime lights also i should metion i dont have dash lights and the exhaust break isnt working as well. All fuses have been checked and everything is as it should be

[@shafeeqpv5822]

Isuzu npr truck 2009 blinking engine light any solution

[@carlburton2882]

Thomas, my check transmission light on 2005 NPR comes on and flashes 9 times. Is that 19? Truck drives fine but don't know why check transmission light flashes while driving. Thanks

[@joelcorriveau9286]

Did you ever find a solution to this? I have same issue.

[@jesusbruno3634]

Will this be the same on Nissan UD 1300?

[@thomasbriansavingmoney]

no, its a little different, let me find you a link.. thanks for watching.

[@fcbayerndinho10]

Side question: I bought my 2004 npr with 98k, i have 120k on it now i have never done transmission oil change on this truck what should i do? is it late for a transmission oil change?

[@thomasbriansavingmoney]

i like to do them about every 50,000.to 70,000 fluid and filter. i have one coming up, i will make a video of it. thanks for watching. i do not flush it, just change fluid and filter.

[@macdonaldprecious1615]

My Isuzu NPR is stocked on reverse and won't transmit to other forward gears

[@jaimecastillo3873]

Where can i find the code 11 on isuzu..and how ti fix it..thanks

[@JS-pb1sz]

Where could I look up the codes?

[@larylongprong]

I just tried this on an 06 NPR and it didn't work?! the fault it has is the idle speed knob on the dash is not working, need to be able to increase idle speed for the PTO

[@timjreese]

Does anyone know where the OBD2 port is on a GMC W3500?

[@kenkappler9352]

Is it the same on a 1997 NPR?

[@WHITESWRECKER]

Do you have the code list?

[@juliofonoti843]

good info. thank you.

[@thomasbriansavingmoney]

thanks for watching Julio

[@anthonymurphy3940]

I have 2006 nqr diesel. The dash indicator light for reverse comes on when i hit the brake pedal and the check trans light flashes every now and again. Any ideas ?

[@thomasbriansavingmoney]

sounds like a short in that circuit. pull the clip harness to trans and clean it. it may just be a loose connection. it may be a bad ground on trans as well. they sound related to me. so the common denominator i would thing is the wiring to trans. please let us know what you find. but go to harness to trans first. thanks for watching.

[@javiercavazos4986]

What does this mean on a 2003 gmc npr

[@SuperElhomie]

Whats a code 19 on a 2007 NRR

[@label1877]

I have a 2002 NPR...350 gasoline. When I turn on right blinker...it makes a loud humming noise...blinker won’t work and it has tripped on three service lights on the dash. Radio fuse removed and negative battery ground disconnected did not clear dash lights. Anyone got a suggestion?

[@frankarce1437]

hi, where can i get the code list

[@kevinandmonaash2436]

I'm having a problem with my 2005 npr it's a fuel issue wondered if you have much experience with this issue with 2005 npr ?

[@thomasbriansavingmoney]

check valve on the return line drives me crazy. whats your issue ?

[@abehndz8107]

I’m having same problem 05 npr 5.2 after 15 mph the pedal stop working no acceleration engine still running only no throttle any advice thanks!!

[@maxsmith2320]

hi , will this same work for 2000 Isuzu NPR V8 5.7L Gas

[@thomasbriansavingmoney]

yes it will. i use this on both gas and diesel. as long as you have the obd port.

[@maxsmith2320]

i do have obd port, ill try. thank you

[@herathliyanagerathna7459]

How to isuzu 2005 4hl1 diagnostic

[@malcolmmiller4150]

My NPR HAS NO OBD2 PLUG HOW DO THE JUMPER WIRE

[@Jim0i0]

Wow, where did you get this info? Does that trick work with OBD1 models?

[@thomasbriansavingmoney]

if its the npr, yes.

[@Jim0i0]

thomas brian I just got a 1995.5 GMC Forward gas. These vids are so helpful right now. Just wish my truck was half as rust free as the ones I see on KZbin.

[@thomasbriansavingmoney]

living back east will do that i guess. i too call a pop a pop. or a soda pop. a coke is one certain brand. ha. thanks for watching.

[@Jim0i0]

thomas brian Thanksgiving with my dad working on the truck. kzbin.info/www/bejne/hqmth5igZb6Ie7M

[@dansager2945]

I fix the misfire and I’m still getting one long pause and nine flashes three times in a row and then it just keep repeating that I took a video of that

[@landonbercian2093]

Hey, I have a 2006 NPR and once the CEL comes on it'll go into limp mode (no power and only about 10mph) does anyone happen to know what the problem mite be? Or do I need to get the codes? Just wondering if anyone has ran into this issue and knows the solution. Thanks!

[@mohdazwan525]

My engine 4hg1 efi problem can you help me

[@whiteboy8628]

Hey my friend. My transmisión wont change a gear it won’t accelerate won’t go owner 20 miles Isuzu 2009 npr. And transmission lights on

[@thomasbriansavingmoney]

you are in limp mode. check my video out, could be your problem. ( 2000 isuzu npr no start, transmission shifting issues.) highlight and copy and paste to you tube.or click on my name under the video and search npr no start. thanks for watching

[@carlosjackson7018]

What if it's a 1994 gas npr?

[@markrivera360]

My NPR when I put a wire on the 4and 11 it keeps flashing no stops

[@thomasbriansavingmoney]

sounds like you have a 01 code, when is the last time the trans was serviced, you may be running warm due to dirty fluid and filter.

[@markrivera360]

i been meaning to fina a code reader that can read codes for thay npr. i have a regular code reader for cars but it dose not seem to be able to read NPRs what kind of reader do i need?

[@tylerfilby5509]

Any update I'm having same issue with mine.

[@billgodfrey5407]

mine does the same thing. parked it last Wednesday evening, no problems. Dead as heck Thursday morning. no crank, no box lights at all (2006 NPR Diesel, 14 foot box). Only lights on dash are brake booster ,ABS, check trans. after a few seconds the low fuel signal comes on. Changed batteries and cables. Starter was gone over a month ago. Tried 4&11 jumper and nonstop blinking. Just changed ECM and ECM relay. can jump start starter crossing solenoid and starter terminal. Cranks beautifully. No start. Blinkers blink fast, headlights come on with key, no upper cab lights, Ready for some dynamite!!!!!!

[@billgodfrey5407]

Also checked every fuse, moved relays around, checked inline fuses. This sucker is just a 4&1/2 ton boat anchor in my driveway.

[@susmcflur]

Hey man I clicked on ur name and I didn't see a video for for code 11 ? Please write back

[@leonellopez8406]

Hi can you help me with a code 7 what’a is