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 L100FACTORY OEM SERVICE PROCEDURE
Power Door Lock DTCS
POWER DOOR LOCK DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B3127 or B3128 | Open In Driver Door Unlock Relay Control, Or Short To Ground In Driver Door Unlock Relay Control |
| DTC B3132 or B3133 | Open In Door Unlock Relay Control, Or Short To Ground In Door Unlock Relay Control |
| DTC B3137 or B3138 | Open In Door Lock Relay Control, Or Short To Ground In Door Lock Relay Control |
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.