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Anyone care to chime in on these ecu codes


 
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HONEYBADGER007
n00b


Age: 26
Joined: 12 Mar 2013
Posts: 9
Location: Jacksonville, NC

2004 Dodge Neon SXT

Post: #1   PostPosted: Tue Jan 12, 2016 12:28 pm    Post subject: Anyone care to chime in on these ecu codes Reply with quote

I was driving home and everything was fine but I can to a stop light and when the light turned green I went to drive and it shut it, I had thought I stalled out and started the car back up. It started kind of rough and i drove maybe another mile and it shut off as i was cruising in 4th gear, coasted into a parking space off the road and tried to start it again and got nothing. I checked for ecu codes the next day and got this p0129 p0456 p0440 p0645 p0508 p0688 p0108 p0344 p0340 p0335 p0032. WTF I don't know where to start or what caused this. Bad ecu, bad wiring from my fic, or do I need an exorcism any help would be greatly appreciated
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occasional demons
Mr One World
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Age: 52
Joined: 03 May 2007
Posts: 19836
Location: Ashland, Ohio

2001 Dodge Neon ES

Post: #2   PostPosted: Tue Jan 12, 2016 4:33 pm    Post subject: Reply with quote

Check the fuses in the underhood fuse box. (PDC) If all those are good, check the ground near the driver side headlight.

You may have also lost the 8 or 5 volt power out of the PCM, or have a loose PCM connector. About all I can think of that would set all those codes.

If all checks out, then it could be the PCM. If you do not have 8 volts at the cam or crank sensor connectors after checking the ground, and the fuses, You can make an external power supply using a voltage regulator such as the LM 7809 for the 8 volt, but it will be closer to 9 volts. Not sure if it will matter, possibly with a load it may be near 8 volts. An LM7805 will work for a 5 volt supply.

Just do a google search for a source if you dom't have a Radio Shack nearby.
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2001 neon ES MTX with '02 R/T PCM
1999 neon 2.4 EDZ MTX
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MichNeon
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Age: 53
Joined: 15 Sep 2013
Posts: 195
Location: Metro Detroit, Michigan

2004 Dodge Neon R/T

Post: #3   PostPosted: Thu Jan 21, 2016 6:15 pm    Post subject: Reply with quote

That P0508 code can be caused by a bad asd relay. Try swapping the asd relay with a known good one. I went thru a similar situation with that code recently, turned out to be a bad asd relay. A new one fixed it.
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