2001 Saturn L100 AutomaticFACTORY OEM SERVICE PROCEDURE

Body Control Module DTCS

BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description
DTC B1000 ECU MALFUNCTION
DTC B1001 OPTION CONFIGURATION ERROR
DTC B1327 DEVICE POWER NO. 1 CIRCUIT LOW
DTC B1328 DEVICE POWER NO. 1 CIRCUIT HIGH
DTC B1372 DEVICE IGNITION NO. 1 CIRCUIT LOW
DTC B1382 DEVICE IGNITION ACCESSORY CIRCUIT LOW
DTC B2965 KEY-IN-IGNITION CIRCUIT OPEN
DTC U1000 CLASS-2 SERIAL DATA LINK MALFUNCTION
DTC U1016 LOST COMMUNICATIONS WITH ENGINE CONTROLS SYSTEM
DTC U1064 LOST COMMUNICATIONS WITH BCM
DTC U1088 LOST COMMUNICATIONS WITH SDM
DTC U1096 LOST COMMUNICATIONS WITH IPC
DTC U1300 CLASS-2 SERIAL DATA LINK LOW
DTC U1301 CLASS-2 SERIAL DATA LINK HIGH
DTC U2100 CAN BUS COMMUNICATIONS MALFUNCTION
DTC U2105 LOST COMMUNICATION WITH ECM
DTC U2106 LOST COMMUNICATION WITH TCM
DTC U2107 LOST COMMUNICATION WITH BCM
Factory Service Tools

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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.

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