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 Cadillac STS AWDFACTORY OEM SERVICE PROCEDURE
Keyless Entry System And Remote Functions - Diagnostic Trouble Codes
KEYLESS ENTRY SYSTEM AND REMOTE FUNCTIONS - DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B3119 | DTC B3119 02 Keyless Entry Antenna 1 Performance Short to Ground DTC B3119 05 Keyless Entry Antenna 1 Performance Short to Battery or Open |
| DTC B3120 | DTC B3120 02 Keyless Entry Antenna 2 Performance Short to Ground DTC B3120 05 Keyless Entry Antenna 2 Performance Short to Battery or Open |
| DTC B3121 | DTC B3121 00 Keyless Entry Antenna 3 Performance - Rear Compartment Antenna |
| DTC B3122 | DTC B3122 00 Keyless Entry Antenna 4 Performance - Console Active Antenna |
| DTC B3123 | DTC B3123 00 Keyless Entry Antenna 5 Performance - Console Passive Antenna |
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.