The code that displays this "Communication error with ecm/pcm" is pending according to my tuner when he checked up on my ECU .My tuner says he has never seen this and could be a big issue.

I just bought an Evo X MR with 250 miles about 3 months ago. I got it tuned at 1000 miles. Now it has approximately 1700 miles now. And i had 3 problems within the last 5 weeks after the tune coincidentally, which most of them are fixed.

I've had problems the last few weeks:

(1) After activating fast key, car would Completely just die when i go into the car.
Battery was replaced because it was bad. Needless to say, the car still died once afterward. I think it was because of my fast key in the same pocket as my cellphone and a metal key chain attached to that. I think the dying problem has been fixed hopefully cause it has not happened again.

(2) Idle was stuttering upon starting the car and then it dies. Had to restart car. Id have to put a little gas or change gears. Tuner fixed that, forgot to disable limp mode. Has not happened again.

(3) Tuner says a very rare code popped up or is pending. He forgot to write it down but it said "Failure to communication with ECM/PCM" Note when i drive around sometimes. Randomly at times, all the icons just appear and the navi starts to reset. Its like the car is rebooting itself or something while DRIVING.

I'm thinking this is serious and i just filed a case. Cause i have a one year warranty.

Any suggestions on what this code is? Some feedback and the correct way to approach the Mitsu dealership on fixing this problem.

 

Make a copy of your tune and revert back to the stock flash.

If you problem goes away and stays, you know where the problem is. If not, take it just like that to the dealer and make use of that legendary MMNA warranty.

 

+1. Go back to stock and have look at it. Something isn't right.

 

If I were to hazard a guess, it sounds like an ignition switch problem to me. Something is causing the ECU to reset and since the NAV system resets also, that sounds like an ignition circuit issue.

So what happened to the 3 year warranty??

 

Yea my car is tuned though lol. I don't have the necessary equipment to log in and turn it back to stock. But i will let Mitsu take a look at it and the see the ignition circuit.

 

MR

I'll hazard a guess .. it happens after the tune ??

Its not the ignition ..

 

Damnit Gunzo, don't keep us in suspense. We know it's not the hardware, but you know what is causing the software problem. Do tell!

 

On the SST cars if you pull or write to the ECU it will throw that code. You need to clear the code after each time...

If the tuner has never seen this, you are the first SST car he has seen.

- Bryan

 

ooh .. and goodluck too eh ??

 

My tuner has tuned many MRs. And i don't want this to be a flame fest against them. If you look in my older posts, you can easily find out my tuner.

They took off the code and said it was "Pending". BUT they said they have never seen that code in any of the MR's and GSR they tuned for the last few years. Its not one of those P codes but a different letter. Sorry he said because he forgot to write down the code and just cleared it.

But is #3 a problem? It happens very randomly and probably once in a while. It hasn't happened since i visited my tuner recently but like i said "MY tuner says the code is Pending"

 

I'm not flaming them. Yours must be the first SST MR if that is the first time they have seen that code happen. It's not a flame, it's a fact.

That is because it is SST equipped cars only, which are only avail 2008 +. You can clear it in EcuFlash fully without it "pending"

 

Thank you for the response. I guess it has not happened to me (knock on wood) since i visited my tuner recently. Thank you Gunzo and GST Motorsports.