Electrical Issue?

BROOKING PETERSON

MEMBER
2003 JEEP LIBERTY
V6
2WD
AUTOMATIC
225,000 MILES

Hi! I was driving the other day and suddenly my car would not accelerate anymore when I pressed on the gas pedal. The gas gauge then dropped to E (although it was at 1/2 tank), and my car shut off. When I tried to restart the car, it sounded like it was trying to turn over but could not successfully start. I had it towed to an auto shop, but they can’t seem to figure out what exactly is wrong besides a probable electrical issue. They have mentioned wanting to replace the ECM and fuse box. We are trying to figure out if anyone has had this issue before and what they did to fix it. To attempt to fix the car the auto shop is quoting me at $2,000, which is approaching the value of my car, so we’re hoping to be able to fix the issue ourselves. Any ideas or information is appreciated!

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,949 POSTS

Yep, I have seen this problem before the BCM is going out here is the location and how to replace it in the images below. To be sure you should do a CAN scan which is easy, you can get a CAN scanner (Controller Area Network) from Amazon from about $32.00.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

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

Amazon CAN scanner Link.

https://amzn.to/3G7mpFP

You can get a rebuilt BCM by searching Google or eBay. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.

Images (Click to make bigger)