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 LTZFACTORY 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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