Passenger Door Lock Switch Circuit Low
Code B2474 indicates that the Body Control Module (BCM) or Door Control Module (DDM/PDM) has detected abnormally low resistance (short to ground) in the passenger door lock switch signal circuit. This prevents the module from correctly reading the switch position (Lock/Unlock), typically disabling central locking from that door.
1. Commonly Affected Makes
2. Most Common Causes
3. Symptoms You Will Notice
- Central locking inoperative from the passenger door
- Door lock switch may not respond or works intermittently
4. Step-by-Step Diagnosis
Scan for related codes and verify B2474 is current
Inspect passenger door lock switch and wiring for damage, corrosion, or shorts
Test switch continuity and resistance; compare to specifications
Check BCM/PDM connector for bent pins or moisture
If wiring and switch are good, suspect module failure
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but you may lose central locking function from the passenger door. Have it diagnosed soon to avoid potential battery drain or further issues.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the switch, wiring, or module needs replacement. Diagnostic fees are usually $75–$150.