B0520: Passenger Door Open Switch

What does B0520 mean?

The body control module has detected a fault in the passenger door open (jamb) switch. Same fault profile as B0510 but for the passenger door.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Warning light or symbol related to the affected system
• Comfort or safety function impaired

Common causes

• High Door jamb switch stuck or corroded
• Medium Wiring open in door hinge

Likelihood is a general estimate across vehicles; your make and model may differ.