Hello all,

I have an issue with my car, but has since been temporarily resolved. Here is what happened:

I have a 2005 LGT 5EAT, and last Tuesday I was backing out of a parking spot and put my car into drive and it stalled, put it back into P, and restarted the car and boom it did it again. After awkwardly pushing it back into a parking spot, I called AAA and got my car towed home. Called up a mobile mechanic who came, checked out the car and also found an oil leak that is not bad, but should be addressed soon. There was no CEL so we could not pull up any codes. The mechanic unhooked the battery for about 5 minutes put it back on and boom there was a CEL for P0700 followed by a P1718. The car has since been driving, and I have been driving it like a grandma, not even hitting more than 4 pounds of boost. The CEL went away after about 2 days but stored the codes. The mechanic advised me to buy a TCM and replace it as it could be the issue, which I did. But after further research apparently one person fixed it by finding out they had a bad brake light switch (mine works), and another one by replacing the LED brake lights with halogen (I have LED's as well). My question is...how the h*ll does f**king LED BULBS cause a f**king car to stall?? This happened to me last year, but dropped off to a mechanic and he was able to fix it. Another question--could a faulty TCM indeed be the cause of this or a short somewhere??

In CAN bus systems brake lights can be linked to traction control. Good luck.

Among a host of other problems (turbos, ring lands,  HVAC panels, etc), those early LGT's suffer from TCU, trans wiring harness, and trans valve body issues with 5EAT.

My advice - sell it or trade it while the codes are off. 

GD

On 12/6/2019 at 7:18 AM, uniberp1 said:

In CAN bus systems brake lights can be linked to traction control. Good luck.

Thanks for the response. I see..I do have LED brake lights and do wonder if this is the issue. As someone resolved it by replacing them back with halogens and one person had a faulty brake light switch.

23 hours ago, GeneralDisorder said:

Among a host of other problems (turbos, ring lands,  HVAC panels, etc), those early LGT's suffer from TCU, trans wiring harness, and trans valve body issues with 5EAT.

My advice - sell it or trade it while the codes are off. 

GD

Thanks for the response. If I had the money or the time to I would but I am also paying off the car. I am looking to get extended warranty asap.

Edited December 9, 20196 yr by AJLEGACY

Update--TCM replaced, TB cleaned, replaced air filter, and oil leak was not a leak, turns out it was overfilled, drained some oil into a bucket and will see if it still leaks tomorrow. Car is driving, idles better and no dips in RPMS when I from Park/Reverse to drive. 

Looking into extended warranties and I was able to found one that I am highly considering. 

Edited December 10, 20196 yr by AJLEGACY

Update 2--Seems that passenger valve cover gasket is the culprit. Oil is pouring out so I am leaving the car parked until I am able to take it over to a shop..they will confirm for me that the valve cover is the issue but after taking a closer look it does seem to be the issue.