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.
2002 Saturn L300FACTORY OEM SERVICE PROCEDURE
Keyless Entry DTCS
KEYLESS ENTRY DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B3109 | KEYLESS ENTRY TRANSMITTER LOW BATTERY |
| DTC B3127 | LEFT FRONT DOOR ONLY UNLOCK CIRCUIT LOW |
| DTC B3128 | LEFT FRONT DOOR ONLY UNLOCK CIRCUIT HIGH |
| DTC B3132 | ALL PASSENGER DOOR UNLOCK CIRCUIT LOW |
| DTC B3133 | ALL DOOR UNLOCK CIRCUIT HIGH |
| DTC B3137 | ALL DOOR LOCK CIRCUIT LOW |
| DTC B3138 | ALL DOOR LOCK CIRCUIT HIGH |
| DTC B3267 | TRUNK RELEASE OUTPUT CIRCUIT LOW |
| DTC B3268 | TRUNK RELEASE OUTPUT CIRCUIT HIGH |
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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