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.
2007 Saturn Sky Red Line, AutomaticFACTORY OEM SERVICE PROCEDURE
Data Link Communication DTCS
DATA LINK COMMUNICATION DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | DEFINITION |
|---|---|
| DTC B1000 | Engine Control Unit Performance |
| DTC B1001 | Option Configuration Error |
| DTC B1004 | Keep Alive Memory (KAM) Reset |
| DTC B1009 | EEPROM Checksum Mismatch |
| DTC C0550 | EEPROM Checksum Mismatch |
| DTC U0001 | This diagnostic procedure supports the following DTC: |
| DTC U0020 | Low Speed CAN Communication Bus Performance |
| DTC U0073 or U2100 | Controller Area Network (CAN) Bus Communication |
| DTC U0100 to U0299 | Lost Communications: ECM, TCM, BCM, or ABS |
| DTC U2103 | Fewer Controllers On Than Programmed. |
| DTC U2105 to U2199 | Lost Communications: Various Control Systems |
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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