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 Ion Red LineFACTORY OEM SERVICE PROCEDURE
Immobilizer DTCS
IMMOBILIZER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | DEFINITION |
|---|---|
| DTC B2957 | Security System Sensor Data Circuit Low |
| DTC B2958 | DTC B2928 Security System Sensor Data Circuit High |
| DTC B2960 | Security System Sensor Data Incorrect but Valid |
| DTC B3031 | Security System Controller In Learn Mode |
| DTC B3033 | Security System Indicates Tamper |
| DTC P1626 | Theft Deterrent Fuel Enable Signal Lost |
| DTC P1630 | Theft Deterrent Learn Mode Active |
| DTC P1631 | Theft Deterrent Start Enable Signal Not Correct |
Factory Service Tools
Use the Manual With the Right Hardware
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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.