Engine/Transmission (1998.5 - 2002) Truck throws codes P0234 and P1690-- what do i do now?

[Hohn]

My MIL went on tonight, so I checked the codes and found the following:



0234-- overboost



1690- inj pump CKP does not agree with ECM CKP.



That last one sounds serious. What should i do?? The truck seems to run just fine (maybe more rattle, but it might be my imagination). It's not in "limp" mode or anything that I can tell.



These codes need a DRB to be cleared, right? They aren't those kind that go away after x amount of start/shutdown cycles... are they?



I know I probably shouldn't be too worried, but I want to be smart about this.



What should I do? Thanks for your help even though I haven't posted much lately.



Justin

 

[Sticks]

Originally posted by Hohn

My MIL went on tonight, so I checked the codes and found the following:



0234-- overboost



1690- inj pump CKP does not agree with ECM CKP.



That last one sounds serious. What should i do?? The truck seems to run just fine (maybe more rattle, but it might be my imagination). It's not in "limp" mode or anything that I can tell.



These codes need a DRB to be cleared, right? They aren't those kind that go away after x amount of start/shutdown cycles... are they?



I know I probably shouldn't be too worried, but I want to be smart about this.



What should I do? Thanks for your help even though I haven't posted much lately.



Justin

OK...

Your EZ should not be allowing the 0234. That means that you either have a bad connection at the MAP sensor or the EZ is baked.



1690, this is bad. Could be related to a baked EZ.



First things first. Take the EZ off and put your OEM boost elbow back on (or remove the turnbuckle if you are auto), drive to Auto Zone and have the codes checked again and cleared. Drive the truck for a week and check the codes each morning before you start. If the MIL light comes back on then you have a more serious problem. When my VP went out, the MIL light never came on, but the 0216 code came up regularly. If you do not get any codes after a week, then put the EZ back on, making sure all of your connections are good, and do the same thing with checking the codes. The first time it comes back, call Edge and get a replacement.

 

[Hohn]

I removed the EZ and the MIL went out.



Codes are still in the ECM. Autozone said it's illegal for them to clear the codes!!! Is this true? I suspect they will go away after a while-- past codes (169, 0500) always have.



The truck runs fine (though the FP is acting weird). Maybe I should drive it for a while w/o the EZ and see what happens? Then, reconnect it and see what happens.



I don't have the stock boost elbow, so I just have to use a little pedal restraint.



Justin

 

[Sticks]

Originally posted by Hohn

I removed the EZ and the MIL went out.



Codes are still in the ECM. Autozone said it's illegal for them to clear the codes!!! Is this true?

This is the second Auto Zone dumba$$ reference I have seen in 10 minutes. Where are they hiring these nimwits from?



No it is not illegal, find another Auto Zone. If it was illegal to clear them then they could not make or sell scanners to the public that performed that function. The only thing that I can think of would be emmission related (clear before a test), but that is even a little bit of a stretch.

 

[Hohn]

Sticks strikes again with his infamous common sense.



I sent the EZ off the Edge. Hopefully, they send me a new one soon.



Justin

 

[Hohn]

Well, all was well with the new EZ that Edge sent, but today I got a 1690 back again after almost a month of bliss. What's the deal?



The truck runs GREAT-- but I have this MIL on now. I can see if disconnecting it fixes things (again), but I have to say I am a little disappointed with THIS ez not lasting longer. I suppose my pump could theoretically be bad, but there are NO symptoms-- smoke, power, starting-- all is well.



I guess the moral to this story is that I am a short distance away from swearing off the Edge products and going with a little box called a PMAX competition



Any ideas? Sticks? Buehler?



Justin

 

[lcoblentz]

On a related, yet slightly different note... ... ...

I had Autozone tell me they could no longer clear codes. I believe it was a corporate management decision (at least that's what I was told). Also, I'm beginning to believe my EZ may be responsible for my P0216 code, as well as the P0234. I have ignored the P0234 code for the past several months, because this is the second EZ I've had that allowed the P0234 code. I sent the first one back to Edge, and now the replacement has been doing the same thing. Not 100% certain it's the cause of the P0216 code though, because the idiots at Autozone wouldn't clear the codes! Waiting to see if they disappear on their own without the EZ installed.

 

[azpete]

Hohn, I also had the 1690 code set for the last 6 months, but only when the outside temp was cold enough to activate the grid heater. After startup it would idle rough and belch smoke. The only cure was to plug the truck in every nite during the winter and would start fine with no code. Called DD (DD-UFM) and they said to send it back and would replace it. Didn't want to do that until I did some tests to see if maybe an electrical problem might be the cause. Now it's too warm out too through the code.



On a side note, the lift pump pressure was acting up all last winter and finally replaced it last week. The new one has lower pressure than the old.

 

[Turbo Tim 1]

I had the 1690 code then shortly later I started loosing my tach, turns out the cam position sensor was bad or the connection was bad. Wiggle around the cam position sensor connector and see if it goes away, might just be the connection.

 

[Hohn]

Well, the MIL went out just as mysteriously as it came.



The code's still there, so I think that I will have to check the cam position sensor. It's possible I messed up the connection when I was wrenching on something else... but I don't think it's likely.



The truck runs GREAT!! Like it never has before.



Gremlins, I tell ya-- Gremlins.



Justin

 

[Hohn]

UPDATE: Gremlins are back, and i don't mean the obscure AMC junker... .



I get a MIL on the dash, and it's the trusty 1690 code. This is with the EZ data connector unplugged. I have yet to check the Cam sensor. '02 has cam sensor, not crank sensor, right?



Where's that diagram showing where the different parts are?



Truck is running fine, but there's a WEIRD phenomenon going on: it totally loses all clatter at exactly 2000 RPM. It's like it goes from sounding like a diesel to sounding dead quiet with just a dull hum. What's up with THAT??



Also, I'm getting some weird noises and low boost (25psi max) when before I could hit 32 psi. I'm going to have to check things out a bit... . Could be another leaky boost fitting.



Justin

 

[RobbyRam]

My STRONG suggestion to anyone who 'upgrades' their stock Diesel Ram electronics is also to invest in a 'scanner/code' reader and eraser. This is because your ECM and PCM are VERY sensitive & store ANY irregularities, and when it gets 'three' anomalies, even if not serious, it throws a code and the dash-lite, and even sometimes puts you in 'limp' mode, and even your Turbo will not work right.

You can just erase them, the 'limp' goes away, or the turbo 'MAP sensor' recorrects itself, and you just drive on with no ill effects with your 'baby' back to normal. If you REALLY have a 'VP44' failure, well, nothing other than replacement will help and so you don't need to pay a dealer $$ to tell you that! Remember, "you are your own warranty station," so act like it and buy a 'code reader/eraser. '



I invested in the 'Cummins Queck Check II' for the Palm VIIx palm pilot, and also 'HD Harrison's' software and hardware for the Lap-Top and the Palm-Pilot. DO NOT WASTE YOUR $$$ ON THE CUMMINS QUICK CHECK!!! Although it works flawlessly, and is fun to look at, it only 'identifies' codes, but can't clear them! And the software/cables are an outrageous $299, the price of a real 'Snap-On'Scanner.



Any other quality Scanner (like MAC's) will work. It should even be required by TDR Members as part of everyone's toolbox, (along with vice-grips and duct-tape!)

Bob in Sacto