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.
2011 Chevrolet Cruze LS, AutomaticFACTORY OEM SERVICE PROCEDURE
Data Communications Diagnostic Code Index
DATA COMMUNICATIONS DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1000 | B1000 XX: Electronic Control Unit |
| DTC B1001 | B1001 XX: Option Configuration |
| DTC B101D | B101D XX: ECU Hardware |
| DTC B101E | B101E XX: ECU Software |
| DTC C0550 | C0550 XX: Electronic Control Unit |
| DTC C056D | C056D XX: Electronic Control Unit Hardware |
| DTC C056E | C056E XX: Electronic Control Unit Software |
| DTC U0001 | U0001 00: High Speed CAN Communication Bus |
| DTC U0002 | U0002: High Speed CAN Bus |
| DTC U0020 | U0020 00: Low Speed CAN Communication Bus Performance |
| DTC U0073 or U2100 | U0073 00: Control Module Communication Bus Off U0073 71: ECU HS Bus Off U0073 72: ECU LS Bus Off U2100 00: Controller Area Network (CAN) Bus Communication U2100 47: Controller Area Network (CAN) Bus Communication |
| DTC U0074 | U0074 00: Control Module Communication Bus B Off |
| DTC U0100-U02FF | Control Module (Refer To CONTROL MODULE U CODE LIST ) |
| DTC U0300-U0336 | U0301 00: Software Incompatibility with Engine Control Module U0302 00: Software Incompatibility with Transmission Control Module U0315 00: Software Incompatibility with Electronic Brake Control Module |
| DTC U0400-U05FF | Control Module (Refer To CONTROL MODULE U CODE LIST ) |
| DTC U1500-U15BF | Control Module (Refer To CONTROL MODULE U CODE LIST ) |
| DTC U1814 | U1814 00: Powertrain Wake Up Communication Circuit |
| DTC U18B9-U18BF | U18B9: Primary High Speed CAN Bus Subnet Configuration List U18BF: Secondary High Speed CAN Bus Subnet Configuration List |
| DTC U2099 | U2099 00: High Speed Communication Enable Circuit |
| DTC U2101 | U2101: CAN Bus Maximum Configuration List |
| DTC U2103 | U2103 00: Fewer Controllers On Than Programmed |
| DTC U2105-U2199 | U2105-U2199: Transmitter Module Availability |
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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