MAP SENSOR HELP PLEASE
 

Okay yesterday I put a new negative battery terminal on my drivers side battery, I cleaned eveyrthing up on the posts connected all the wires made sure they were all clean. Started my truck went down the road and now its in limp mode, ran my codes and got P0236 and p0237 Pulled my wires for my Quadzilla off checkes all connections cleaned them all out gotmy DMM and made sure no wires had an "Open" in them in the quad wireing harness still nothing, I also pulled the map sensor and cleaned the hell out of it with brake cleaner still nothing. As soon as i clear the code i dont even have to start the motor and the codes come right back. or atleast one does its usually P0236. Cant really drive it like this so if anyone can help me I have to go to work tomorrow and its an hour away.. thanks alot.:scare2::ouch::ouch::ouch::ouch:

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Oh also forget to say the day before all this I put a lock up switch on my truck but I did that right i put the jumper wire in the relay spot also, it ran fine with it so i dont think that put the computer in limp mode.

Here you go...
Mopar1973Man's Dodge Cummins Articles - P0236 MAP sensor Too High Too Long

Mopar1973Man's Dodge Cummins Articles - P0237 MAP Sensor Voltage Too Low

Run the diagnostics and tell me what happens...

Okay I did all that still no luck, only part I dont understand is how do you check number 5. in your instructions, the voltage of the sensor i dont understand do I pull it out and check it unplugged? Will a map sensor cause my truck to go into limp mode???

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Would anything else cause this

2 causes...

Quadzilla is shot or the MAP sensor is shot.

So if you unhook the Quadzilla does the problem go away if so then the Quadzilla is fried. If the code remains its because the MAP sensor is fried.

When I plug the ground in on the tuner the motor goes into limp mode if I'm in drive take the ground off and it will let you rev a little higher but not much. Idk I by passed the tuner once and it did the same thing. It spuddering and missing when it's unhooked too

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Bump

Un hook the MAP... Hook the stock lead back to the sensor directly.

Un hook the CANBUS.

Leave the ground alone...

Still running like junk but a little better 2 grand all the time hardly can get up to 55

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Friend told me the lock up switch probably put it in limp mode an now it needs flashed is that possible? It won't let me rev over 2grand in drive with the tuner not hooked up at all

Try returning it back to normal and see if that the problem. If it in limp mode it will throw a code so there would be a trans code for this.

Ok I don't have that I returned it to normal and cleared codes still runs like shit only code I have is p0222 which is tps so now I'm confused

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I'm flat footing it with the tuner in my garage at home I'm on the road floored it hardly gains speed

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This sucks all I can say

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Not sure what else to try this is where I'm at. When the quadzilla is completely off the truck and everything is back to factory the truck still runs like crap seems like it's not getting fuel past a certain point like something is stopping it. Hen everything was unplugged I only had a p0222 code but then I put it in drive and floored it down the road and got a p0236 and p0222. Boost is acting weird it will only go to about 20 psi really flooring it and when the converter locks (which it is locking at like 30mph sometimes now idk why) it hardly gets any boost and pushing the peddle all the way to the floor no gain in speed no gain in boost and it isn't shifting out of overdrive like it would of it was getting more fuel or if my tuner was on. Just seems like it's in a protection mode or something is making it not getting the right amount of fuel/air. Put the lock up switch on my converter worked and drove great for 2 days then after I change my negative terminal on my drivers side battery this all happens. Sorry I'm just beyond confused.

Mopar1973Man's Dodge Cummins Articles - P0236 MAP sensor Too High Too Long

Mopar1973Man's Dodge Cummins Articles - P0222 Idle Validation Both Low

Do the diagnostics... Report back...

Question, your p0222 diagnosic says on step one, if greater than 4.5 volts, go to next step. If voltage is 5.5 volts or less, go to step 8 . Mine is reading 4.7volts on both pin 2 and pin 6.

So I would go to the next step.

http://articles.mopar1973man.com/ima...pps-sensor.jpg

Ill do that tonight, but drove to wok this morning now I have p0122 p0222 p0236

P0236 is basically stating that the MAP sensor is stuck at a high value and not changing. So I would guess the MAP sensor is done or there is a electrical issue.

P0122 and P0222 is pointing to a failed APPS most likely.

All my diagnostics are here...
Mopar1973Man's Dodge Cummins Articles - 2nd Generation 24V Dodge Cummins

I understand everything your saying just asking before I go do all the wire chasing is a bad map sensor or bad apps or both combined going to cause no power and all that? Or limp mode as you say

I suggest doing the testing and wire chasing before buying any parts. testing is cheap but parts are expensive...

Well I took my apps sensor off to check the connections and now it won't read any voltage when I turn the key on hook my dmm to negative and positive to the wire coming out of computer not getting any voltage while turning throttle so it's junk I guess

I hope your doing that right because that would mean the ECM is junk because the APPS sensor doesn't create the power the ECM does... Double check what you doing.

No what I mean is when you unplug the apps sensor plug i still have voltage going to it on terminal 2 and 6, im saying i plug the apps back in and i still get .0498v or something like that? and doesnt fluctuate when i spin the throttle either. first time i cleaned it i would spin it and at certain spots i would get a reading of like 1.2359v or something then it would stop and go back to some random voltage

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Plugged it in again after work.. Now it works fine lol

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Sorry ive been jumping around but I think I figured it out if you could get back to me, forget about the apps yes i know its going bad but its working anyways the no power issue, i found out today if I plug in my map sensor harness just fatory regular old harness it goes into what im calling "limp mode" and wont let it go past 2k rpm's in drive. BUT I tryed this I unplugged the sensor completly? AND it runs shitty but it runs! So does that mean the sensor is stuck open at a high voltage setting the computer into a limp mode or a protection type thing?? What I mean by it runs when its unplugged is i can actually go the speed limit unlike when the sensor plugged in i cant go past around 35mph.