Car still runs when removing the key

2006 CHEVROLET IMPALA

200,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC

RONALD DEVOLD

MEMBER
134 POSTS

I messed and move the ecu harness to access the a/c orifice tube and the TCM accidentally touch the starter wire and arced. now the car wont shut off when I turn the switch off and removed the key. Also, the car barely moves when in gear. And the display wont show me what gear I am in

Dec 6, 2022 at 8:34 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 POSTS

Hi,

The gear indicator is controlled by the range sensor. The short sounds like the TCM was likely damaged.

What I suggest is to have the can-bus scanned for codes. CAN stands for controller area network. Basically, the different computers/modules are tied together via a few wires. This type of scan will identify codes regardless of the module storing them.

Here is a link that explains how that is done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Also, I attached the wiring schematic for the transmission below. Check to make sure neither of the fuses I highlighted has failed.

Let me know.

Joe

See pics below.

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Dec 7, 2022 at 9:28 AM

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