[Dznrtee]

Please help me! I have a 2017 Procharged Fifty Anniversary 2SS convertible that has a check engine light and these codes pop up when I plugged in my scanner. Also on the dash it'll say "Service Stability control" and then a "P" appears with a wrench under it. Then sometimes it won't up or down shift and the "D" would start blinking. I recently got a new alternator installed and the problem was resolved for a couple weeks and recently started back. I'm at total lost on what to do. Can someone please help me!!!!

[Gunkk]

While a temporary low voltage can cause a bunch of weird false-positive codes, those codes all scream wiring harness or fuse block is cooked/frayed/rubbed/chewed/corroded/wet somewhere.

• Water in the trunk.
• Rubbed harness on the body under the engine bay fuse block.
• Loose transmission module connector or loose/corroded pin.
• Burned harness on the passenger side header.
• Arcing plug wire into the header.
• Rubbed harness behind the driver side rear wheel well liner.
• Fuse block got wet and is full of blue crusties.

Stuff like that.

[Dznrtee]

Originally Posted by Gunkk

While a temporary low voltage can cause a bunch of weird false-positive codes, those codes all scream wiring harness or fuse block is cooked/frayed/rubbed/chewed/corroded/wet somewhere.

• Water in the trunk.
• Rubbed harness on the body under the engine bay fuse block.
• Loose transmission module connector or loose/corroded pin.
• Burned harness on the passenger side header.
• Arcing plug wire into the header.
• Rubbed harness behind the driver side rear wheel well liner.
• Fuse block got wet and is full of blue crusties.

Stuff like that.

Soooooo basically I'm screwed lol

[Timbo-1LE]

Headers? If so, look for burnt harness under coolant tank.

[Dznrtee]

Originally Posted by Timbo-1LE

Headers? If so, look for burnt harness under coolant tank.

No headers yet. My car is basically stock other then the procharger and my Borla atak exhaust but I will check there anyways. Thank you !

[mRahmani]

Going down the list:

B2AAA - incompatible code scanner
P0700 - transmission requested the MIL turned on. Generic code.
U0073 - CAN bus A or high speed CAN failure. Serial messages not received 3 times in 5 seconds.
U0100 - lost communication with engine control module
U0101 - lost communication with transmission control module
P2548 - corrupt torque control information received from ABS controller. Disables stability control

All of these are communication failures on the high speed bus. Check the CAN circuit wiring between the ECM, TCM, and EBCM - I’m pretty sure you’ll find the problem there. Worn or stretched wiring harnesses would be my first guess.

[ctrlz]

Let's start with, "Why was the alternator replaced?"
Sounds like codes may have predated the alternator swap. if so, was the new alternator the proposed solution?

Agree with everyone above, the code mix sounds like a wiring/communication issue. Damaged wiring, fuse block, or connector.

[D3adch1ld]

Any resolution?

Ive had thisbissue intermittently... seems if the car sits for too long and the battery drains even just a bit, it happens.

[Kiko562]

Originally Posted by D3adch1ld

Any resolution?

Ive had thisbissue intermittently... seems if the car sits for too long and the battery drains even just a bit, it happens.

Did you find the solution ?

[Casper the friendly G]

Is you is or is you ain't using your original battery?