ECM issue
Thread Starter
Racer
Joined: Jul 2012
Posts: 466
Likes: 13
From: Grand Rapids Mi
ECM issue
Need some advise/help. Plugged my Hp tuner mvi2 in my OB2 port to pull the stock tune off my 03. Have a 3/4 tank of fuel and my low fuel is displaying and my tire pressure is showing zero now. Have all other functions. Is there a way to reset the factory settings or recover what is missing?
Safety Car
Joined: Aug 2011
Posts: 4,447
Likes: 409
From: Portland OR
Did you get the tune read?
Corvettes can be weird when using hpt.
Generally, make sure the doors are closed. Turn the radio off. Don’t push any buttons, etc.
First thing I’d try is to disconnect the battery negative cable. Then touch the neg cable to the pos batt post for say 10 seconds. Reconnect the neg cable and see if the functions come back.
I know it sounds weird.
If that doesn’t work......
If you did read the tune, Try writing it back in. Same rules about Windows, doors etc.
Corvettes can be weird when using hpt.
Generally, make sure the doors are closed. Turn the radio off. Don’t push any buttons, etc.
First thing I’d try is to disconnect the battery negative cable. Then touch the neg cable to the pos batt post for say 10 seconds. Reconnect the neg cable and see if the functions come back.
I know it sounds weird.
If that doesn’t work......
If you did read the tune, Try writing it back in. Same rules about Windows, doors etc.
Last edited by RonSSNova; Jan 18, 2021 at 09:17 PM.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
The tire pressure monitor system is NOT in your ECM but in your BCM Most often culprit is that the batteries in your wheel tire pressure sensors are bad OR you have installed aftermarket wheels on your car and the tire shop stole your tire pressure monitors and did not re-install them onto your new rims
As far as a mis reading on your fuel gauge it can be many things
Most often It is that your fuel sending unit has failed
C5 's have 2 fuel tanks and use a transfer pump to send fuel from the right tank to the left and maybe that transfer pump has failed as well
As mentioned try dis connecting your battery overnight for at least 12 hours to allow the ECM to completely erase and re-set----
Lastly you may have a dash or DIC issue ( driver information control) that may have failed --aain very common on early C5's
As far as a mis reading on your fuel gauge it can be many things
Most often It is that your fuel sending unit has failed
C5 's have 2 fuel tanks and use a transfer pump to send fuel from the right tank to the left and maybe that transfer pump has failed as well
As mentioned try dis connecting your battery overnight for at least 12 hours to allow the ECM to completely erase and re-set----
Lastly you may have a dash or DIC issue ( driver information control) that may have failed --aain very common on early C5's
