PCM issues?
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Senior User
Joined: Aug 2009
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Assuming you're asking me, I've been chasing a P0380 code for months. I've also developed some trans codes. I've run the entire electical system and it all checks out. I took it to the shop that rebuilt the trans, they say it's in good shape and they think it's the PCM. I discovered that the "reputable" shop that put a new GPR in the truck a couple of years ago, put in a starter relay that is known to do bad things to PCMs (so I've been told). Truth is I'm stumped and don't know what else to do.
Butt-Head
Joined: Apr 2004
Posts: 9,448
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From: Reed Point, MT
Well in that case, I think you may be chasing your tail. I think you need to have it diagnosed by someone who knows what's going on.
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Postmaster
Joined: Aug 2004
Posts: 3,948
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From: SHELTON, WA
i assume the truck is acting up other than just throwing a code? i did not look up your code.....you say the electrical system checks out huh? is your 3rd brake light blown?
check this thread out: https://www.ford-trucks.com/forums/9...eep-dying.html
check this thread out: https://www.ford-trucks.com/forums/9...eep-dying.html
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Thread Starter
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Senior User
Joined: Aug 2009
Posts: 120
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i assume the truck is acting up other than just throwing a code? i did not look up your code.....you say the electrical system checks out huh? is your 3rd brake light blown?
check this thread out: https://www.ford-trucks.com/forums/9...eep-dying.html
check this thread out: https://www.ford-trucks.com/forums/9...eep-dying.html
Yes it's acting up with different symptoms in the transmission coming and going. Sometimes the TC locks up at idle. Sometimes it holds in a gear and will not shift. These are always intermitant and change often. Sometimes, as it did yesterday on the way back to the ranch from my buddy's shop, it runs like a bat outta hell perfect. NO CODES. Pull in the shop, kill it, restart, codes? The P0380 never goes away for long. Sometimes comes back while driving.
I'll check the light and report back.
Postmaster
Joined: Aug 2004
Posts: 3,948
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From: SHELTON, WA
i'm not an auto guy at all. but now that you have posted up some more info hopefully someone with some insight on a sensor or something will chime in. the 3rd brake light is an option as well.
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Senior User
Joined: Aug 2009
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As it turns out, the third brake light was out. I didn't have time yesterday to do anything so I asked my mechanic to check it out. I'm headed out there soon to check the results myself. I'll let ya'll know soon.
