Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Saturn LS2 AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| B1000 | ECU Malfunction | ||||||||
| B1001 | Option Configuration Error | ||||||||
| B1327 | Device Power No. 1 Circuit Low | ||||||||
| B1328 | Device Power No. 1 Circuit High | ||||||||
| B1372 | Device Ignition No. 1 Circuit Low | ||||||||
| B1382 | Device Ignition Accessory Circuit Low | ||||||||
| B2965 | Key-In-Ignition Circuit Open | ||||||||
| U1000 | Class-2 Serial Data Link Malfunction | ||||||||
| U1016 (1) | Lost Communications With Engine Controls System | ||||||||
| U1040 | (2) Lost Communications With Electronic Brake/Traction Controls System | ||||||||
| U1064 | Lost Communications With BCM | ||||||||
| U1088 | Lost Communications With SDM | ||||||||
| U1096 | Lost Communications With IPC | ||||||||
| U1300 | Class-2 Serial Data Link Low | ||||||||
| U1301 | Class-2 Serial Data Link High | ||||||||
| U2100 (3) | Controller Area Network BUS Communications Malfunction | ||||||||
| U2103 | (4) Fewer Controllers On BUS Than Programmed | ||||||||
| U2104 | (4) Controller Area Network BUS Reset Counter Overrun | ||||||||
| U2105 | Lost Communications With ECM | ||||||||
| U2106 | Lost Communications With TCM | ||||||||
| U2107 | Lost Communications With BCM | ||||||||
|
|||||||||
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.