How to: Check codes, test gauges, and check hours
Registered User
Joined: Nov 2005
Posts: 342
Likes: 1
From: Henderson, NV.
I would suggest making a new thread on this with the codes that you are showing as the thread starter...
Just my .02, since I don't have the answer for you.
Just my .02, since I don't have the answer for you.
.... 
. Truck runs fine, must not be that important, was just curious.
Registered User
Joined: Dec 2006
Posts: 625
Likes: 0
From: Corpus Christi, Texas
How to Check codes:
Turn the key on and off 3 times, do not engage starter. On the third cycle, leave the key on. In my vid, it reads 'DONE' because I have no codes, but if you have them, they will display.
How to do a gauge check/display 'C' codes:
Press the odometer trip reset, hold it, then turn the key to the 'ON' position. Do not engage starter. Once the gauge check starts, you can release the button. Once it is done with the gauge check, it will display 'C' codes.
Hour meter check:
Turn key to 'ON'. Press and hold Odometer trip reset button. After a few seconds of it being pressed, it will show the hours.
hth...
mad
Turn the key on and off 3 times, do not engage starter. On the third cycle, leave the key on. In my vid, it reads 'DONE' because I have no codes, but if you have them, they will display.
How to do a gauge check/display 'C' codes:
Press the odometer trip reset, hold it, then turn the key to the 'ON' position. Do not engage starter. Once the gauge check starts, you can release the button. Once it is done with the gauge check, it will display 'C' codes.
Hour meter check:
Turn key to 'ON'. Press and hold Odometer trip reset button. After a few seconds of it being pressed, it will show the hours.
hth...
mad
First, I want to say thank you for the trouble in posting this information. I used the following link to help decipher P-codes:
P-Codes:
http://www.cumminsforum.com/forum/3r...en-trucks.html
I had no "P" codes, but did have a "C" code combination"
A4 01
I haven't found A4, so if someone would post, it would be appreciated.
(I see that the OP is deployed at Iwakuni; I've a son at Kadena (VMGR 152). I was thinking of ALL of you-all while at the recent annual air show at NAS Corpus Christi; how is that May 5 show?)
Thread Starter
Administrator/Jarhead
Joined: Jun 2006
Posts: 14,965
Likes: 19
From: Jacksonville, NC
A big thing with these codes... if anything out of the norm is detected by the ECM/PCM, it set's a code. Sometimes, there is just a hiccup, and something goes out of tolerance for a second, then straightens back up.
If the truck is not running bad, or you don't see any symptoms that the code described, get it cleared and see if it comes back. Make sure it's a failure, an not just a glitch.
Rednax, I'm in Okie right now, just a stones throw away from Kadena. Small world...
If the truck is not running bad, or you don't see any symptoms that the code described, get it cleared and see if it comes back. Make sure it's a failure, an not just a glitch.
Rednax, I'm in Okie right now, just a stones throw away from Kadena. Small world...
Thread Starter
Administrator/Jarhead
Joined: Jun 2006
Posts: 14,965
Likes: 19
From: Jacksonville, NC
http://wiki.dieseltruckresource.com/wiki/Computer_codes
Here are the codes... What are they?
If you do not have a programmer like a smarty that will clear codes, you can take it to an auto parts store, and they can clear them out for you.
Here are the codes... What are they?
If you do not have a programmer like a smarty that will clear codes, you can take it to an auto parts store, and they can clear them out for you.
Registered User
Joined: Apr 2010
Posts: 137
Likes: 0
From: In my Mind
Registered User
Joined: May 2010
Posts: 27
Likes: 0
From: Kissimmee, FL
Hello, I am new to the forum, this is my first diesel truck, the first ouner had some sort of chip on it, I have none on it yet. I did the P code check and the C code check and came up with P0234, P0839, C codes was 00 00. In the list of codes the P0234 is Turbocharger Over-boost Condition, not sure what is causing that, the P0839 is not in the list of P codes, Can any one help me out with this? Thank you.
Thread Starter
Administrator/Jarhead
Joined: Jun 2006
Posts: 14,965
Likes: 19
From: Jacksonville, NC
Welcome to the DTR. You're from my old neck of the woods, I grew up in Okeechobee.
The overboost code means that the ECM saw over 42-ish PSI of boost, and set that code. Nothing is wrong because of that, that code won't hurt anything. However, if the stock turbo saw that a lot, it could mean that your truck was beat on, and anything over 40 psi is not good for a stock turbo.
BTW... It's spelled Cummins... don't know if spell check got your sig or what.
Let me know if you need anything.
mad
The overboost code means that the ECM saw over 42-ish PSI of boost, and set that code. Nothing is wrong because of that, that code won't hurt anything. However, if the stock turbo saw that a lot, it could mean that your truck was beat on, and anything over 40 psi is not good for a stock turbo.
BTW... It's spelled Cummins... don't know if spell check got your sig or what.
Let me know if you need anything.
mad