does transmission control module replacement need programming?
08-30-2018 | 11:32 PM
#1
Thread Starter
Joined: 08-30-2018
Posts: 2
From: TX
does transmission control module replacement need programming?
Hello everyone,
So I just purchased a 2010 chevy hhr which does not kick into 2nd gear. My mechanic says it could be the transmission control module so he put a used one but seems to still run the same as it did before. He says its possible that the PCM needs to be reprogrammed. Can someone please verify this for me? If so can they be purchased reprogrammed already? Thanks
So I just purchased a 2010 chevy hhr which does not kick into 2nd gear. My mechanic says it could be the transmission control module so he put a used one but seems to still run the same as it did before. He says its possible that the PCM needs to be reprogrammed. Can someone please verify this for me? If so can they be purchased reprogrammed already? Thanks
08-31-2018 | 08:11 AM
#4
Senior Member
Joined: 08-03-2010
Posts: 3,564
From: Lake Ronkonkoma, N.Y.
Here is something I found that deals with this code. It's for a Cobalt, it should give you some general knowledge about it.
P0700 Chevy Cobalt Diagnosis and Explanation | GM Transmission Resource
P0700 Chevy Cobalt Diagnosis and Explanation | GM Transmission Resource
08-31-2018 | 08:16 AM
#5
Platinum Member
Joined: 12-06-2009
Posts: 11,431
From: Alabama
P0700 is a generic, basic trans. code that just means there is a problem. Further diagnostics is needed to find the exact problem. Could be as simple as the wiring harness not plugged in tight...............or worse.
1st. Find another mechanic. Someone just throwing used parts at it AND not knowing if it needs to be programmed or not..........I wouldn't have them working on my car.
1st. Find another mechanic. Someone just throwing used parts at it AND not knowing if it needs to be programmed or not..........I wouldn't have them working on my car.
08-31-2018 | 08:17 AM
#6
Senior Member
Joined: 09-17-2013
Posts: 1,408
From: Tampa, Florida
Yes; P0700 only tells you there is a fault stored in the Transmission computer itself. The scanner being used doesn't have the ability to read transmission codes. Youre mechanic needs better equipment if he is gonna call himself a mechanic.
08-31-2018 | 09:15 AM
#9
Moderator
Joined: 01-23-2009
Posts: 25,345
From: Fredericksburg,VA
P0700 definition is "the TCM has requested the MIL to be illuminated". It indicates an emissions related problem.
Only SS has specific codes for solenoids and valves, but there are P codes for most other problems.
Your mechanic should be able to pull the freeze frame, the trans code should show up there. A mechanic with a Tech2/SnapOn type computer should be able to look for U or B codes.
The firmware in the TCM needs to match the vehicle, theoretically a used part from an identical car should work, a new one is blank.
Only SS has specific codes for solenoids and valves, but there are P codes for most other problems.
Your mechanic should be able to pull the freeze frame, the trans code should show up there. A mechanic with a Tech2/SnapOn type computer should be able to look for U or B codes.
The firmware in the TCM needs to match the vehicle, theoretically a used part from an identical car should work, a new one is blank.
09-06-2018 | 10:30 PM
#10
Senior Member
Joined: 10-19-2013
Posts: 360
From: Dallas Texas
I had a bad shift solenoid. Transmission shop charged about $200 labor. He went ahead and changed the 1-2 shift solenoid, the 2-3 shift solenoid and the torque converter solenoid while he had it opened up. I replaced all three solenoids with ACdelco solenoids. Changed the filter and drained and refilled with synthetic fluid. He gave me all the used parts afterwards and sure enough the 1-2 shift solenoid even appeared burned up. I only figured this out with help from this forum, the transmission shop just wanted to rebuild it.
https://www.chevyhhr.net/forums/driv...en-cold-56252/
https://www.chevyhhr.net/forums/driv...en-cold-56252/