P0106, rough start, and then dies

[Ryan]

So today I was sitting at a stop sign waiting for traffic to clear when suddenly my 2013 Dodge Dart with 1.4l turbo stalled out randomly, when I restarted the car it was very rough but no lights came on so I stopped at the nearby gas station to check it out. As I pulled up it died out again. All gauges still seemed normal including the temp, I checked under the hood for anything obvious such as smoke, loose connections or tubes but found nothing. I was just a mile or so away from home so I decided to start it again and drive it the mile home, but as I was pulling into my neighborhood it looked like a Christmas tree on the dashboard. I got a solid check engine light and solid traction control off light, and a flashing electronic throttle control light(red lightning bolt) I shut her down and rolled to my driveway and pushed it up.

Unfortunately my tools were all stolen a few months back so I’m very limited right now, so I went and bought a code scanner to start with. It is only giving code p0106 no misfires or other symptoms. I would just replace the sensor however with the code scanner it actually showed the map sensor Psi that seemed like it may be working?

I don’t have any experience using the live sensors on code scanner so admittedly I don’t know everything I’m looking at but here’s what I saw when I tried running it:
Map sensor started with 8psi and varied up to around 16 psi as the engine cranked and ran rough for approximately 10 seconds before dying.
What I found interesting was the short fuel trim showed 0% until after around 5 seconds when it got a really rough idle and died out, at this time it jumped to 25 percent

Any tips on where I can look? Everything with the map sensor seems plugged in fine I just don’t know where to look first and I don’t want to just throw parts at it.

Topic

[Steve Klein]

Check to make sure that the vacuum line to the MAP is good with no cracks, etc. If it looks questionable at all, replace it. I have seen these cause issues under acceleration where a vacuum line crack is opened up with engine movement. Then, you would need to check the MAP output voltage using a vacuum pump to rule the MAP good or bad. Check to make sure you have 5V source as well. Have you had any work done to the car recently?

[Ryan]

So I went out this morning to continue diagnosing, my plans before seeing this were to throw together a diy smoke tester for it to check for leaks. Then since I saw this I also pulled out the voltmeter. When I first tried to start it it did exactly as it did last night so I started making my smoke tester and disconnected one of the lines to check if my tubing would fit, but shortly after someone wanted to hear what it wasn’t sounding like so I put the line on and started it, and now it’s running perfectly fine again!

I’m still going to go ahead and finish this smoke tester just to be extra sure, I’m worried my pcm may be having problems as I’ve seen other forums mention that on these cars. Oh and as far as any work being done no I haven’t had anything done to the car besides the oil/filter and air filter changes that I did around 3k miles ago
If anything else happens I’ll update here for anyone else who’s having trouble.

[Kevin Criswell]

Have you checked all the air inlet tubing? If one of the tubes come loose from the turbo or the TB than you will get similar running issues and that code.

[Ryan]

I believe I checked all of the air inlets, even the small ones that go around the back side of the engine and they all seemed ok. However I suspect one of them is the problem because the only thing I did in between it not running and running was disconnect one of them for my smoke tester, then reconnected it. It was connected pretty solid when I removed it but I’m thinking it may have fixed a nearby connection. I’m getting a few other things done now but after I run the smoke I’ll recheck all of them as well just in case.

[Ryan]

So I ran the smoke test and there seems to be no leaks, I’m hoping some line I messed with was just loose and caused the problem. Thanks again everyone I’ll update if anything changes or if I end up finding something else

[Kevin Criswell]

sounds good, hope that was it.

[Author]

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