What Does B2473 Mean?
This code indicates the Body Control Module (BCM) has detected a short to ground in the passenger door disarm switch circuit. The disarm switch is part of the vehicle's security/anti-theft system, typically used to disarm the alarm when the door is unlocked with a key. The BCM detected abnormally low voltage on this circuit, indicating the signal wire is shorted to chassis ground or a faulty switch with internal short.
Common Causes
45%
Damaged or chafed wiring in the passenger door harness causing short to ground, especially at the door hinge area where wires flex
30%
Failed passenger door disarm switch with internal short to ground
15%
Corroded or water-damaged door harness connector causing short circuit path
10%
Failed Body Control Module with internal circuit fault on disarm switch input
Diagnostic Steps
1
Step 1: Perform visual inspection of passenger door wiring harness, especially at hinge area and door jamb. Look for pinched, chafed, or damaged wires with exposed copper. Flex the harness while monitoring live data for intermittent shorts.
2
Step 2: Disconnect the passenger door disarm switch connector. Using a digital multimeter, measure resistance between the signal wire (at the BCM side of the circuit) and chassis ground. Should read infinite resistance (open circuit). If less than 5 ohms, wiring harness has a short to ground.
3
Step 3: With switch disconnected, measure resistance across the switch terminals while operating the key cylinder or switch mechanism. Should show open circuit in normal position and continuity when activated. Any reading to ground indicates failed switch.
4
Step 4: Inspect all connectors in the passenger door circuit for corrosion, water intrusion, or pushed-out terminals. Clean connectors with electrical contact cleaner and ensure proper terminal engagement.
5
Step 5: If wiring and switch test good, check BCM connector terminals for corrosion or damage on the disarm switch circuit pins. Verify proper terminal seating and repair as needed.
6
Step 6: After repairs, clear codes and cycle the passenger door lock/unlock with key several times while monitoring live data to confirm the circuit operates normally without shorts.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to ground in the passenger door disarm switch circuit. The disarm switch is part of the vehicle's security/anti-theft system, typically used to disarm the alarm when the door is unlocked with a key. The BCM detected abnormally lo...
The most common cause of B2473 (Passenger Door Disarm Switch ckt Short to Ground) is: Damaged or chafed wiring in the passenger door harness causing short to ground, especially at the door hinge area where wires flex
Typical repair costs for B2473 range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle drivability or safety and the vehicle is safe to drive. The anti-theft system may not function properly and the alarm may not disarm when unlocking the passenger door with the key, but this does not present a safety hazard.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2473 to identify the root cause.
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Quick Info
Category
Body
System
Vehicle Security/Anti-theft System
Difficulty
Type
Generic (SAE)
Recommended Tools
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