Any Ideas, I was programming my pcm with hp tuners and now it won't communicate anymore. The pcm won't turn on the cel when I create codes.The only scan tool that communicates with the pcm is the aeroforce gauge.

 

Get a new one, does the car still start and all that?

 

does the car still start ?

 

dude WTF! thats exactly what happened to me today. My hPtuners cannot connect to the pcm. and if I try to connect with the VCM scanner it says the vcm cant be located. and it throws a little LOCK thingy code. is that happening to you too?

 

Don't quote me on this but I believe our PCMs have a certain amount of times they can be flashed before they go kaput! I doubt any of you guys have reached that point but I would say around 100+ would put you in the odds of it happening.

 

really? I dont think ive reflashed that many times. However, does it require a certain amount of times before it gets unloked. Its almost like my pcm is locked.

 

phil you are wrong my friend... flashed mine now close to 200 times.. still going strong..

reset the battery... and try to get it to scan again.. good chance you might have reflashed a different VIN # onto the car... I did that the first time I flashed mycar... but fixed it
somehow

 

the only way to change the vin of your car is if you use 2 credits and do a write entire. Both of which I didnt do............

 

NO where near 100 flashes. It acts like it is not plugged in . it says interface found but no vehical power detected.
The car runs but it is in limp mode with no check engine light.

 

dunno... mines still going strong... I thought my pcm was fried, just ended up being a fucked up super charger

 

so it runs in engine PWR reduced

 

migtha blown the fuse to the OBD II port

 

Im waiting to see by end or summer how it goes. Im sure some redline guy has the stats on the PCM. But paul you got to admitt GM didnt plan on the avg joe having his own way to flash the PCM a million times over

 

did you reset by disconnecting the battery

 

nope that the cig light fuse and shouldnt casue a Limp Mode i knwo that one

 

i don't think planned on someone like me doing what I do to the poor poor car... lol

thats was just for the power error you were getting.. nothing to do with the limp mode..

have you added any electronic components lately?

 

I've flash my car over 200 times....its still going strong.

not sure about the CEL...but were you logging the car? Playing a log back? Have the Scanner open or just connected? If you did, close them and the scanner and try again.

 

Well I still think its a possibility but I doubt its the Problem in this thread.

 

I am sure it is the pcm.I can unplug sensors and it doesn't set the cel it does set codes I can read with my aeroforce gauge but the hptuner scaner or vcm editor don't comunicate.I tried them on my truck and it seems to work fine.

 

what codes are coming up..?? something about communicating with the BCM..?
check your battery in your laptop too...

 

The aeroforce gauge doesn't use the OBDII power. The MPVI does. Have you checked the fuse. If you are in limp mode there is a code set what is it?

Did you flash it and it went hay wire?

If you want help you need to be clear on how you got to the situation your in.

 

I checked the connector it has power on the pin 16 and ground on pin 4
Thats all I can think of I guess tomorrow I will price out a new pcm.

 

Okay I have the same problem as him. however my car works fine. I was tunning my friends car and all of the sudden we tried to flash it and it did not work. It did not connect. then the car would not turn on, we waited a while and then the car started! so we drove to my house and checked the hptuners on my car and it did not work. It did not connect either. I didnt try to rewrite my car but tried using the vcm scanner, When I tried to connect the vcm scanner, (like when I pressed play) it made a weir bell sound, and then it showed the icon thats an orange lock with a car on the side. This same icon goes on when you lock your car with you keyless remote.

 

Its an error in the latest HP tuners update. My Tuner had to get ahold of HP Tuners to get it fixed.

 

sorry to hear that, Rock auto.com is a good place to look for parts (New PCM) if it comes down to it.