Fault Code B0840
Code meaning, symptoms, possible causes, part number, and estimated cost.
B0840
Interior Courtesy Lamp Circuit
This code indicates a malfunction in the interior courtesy lamp circuit. These lamps illuminate the passenger compartment when doors are opened or the vehicle is turned off, and a fault can affect usability or indicate a door issue.
Part Details
Part Name
Interior Courtesy Lamp
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪150 - ₪500
Engine Location
Passenger compartment
Symptoms
- Interior lamps not turning on
- Lamps staying on
- Dim/irregular light
- Lamps not responding to door opening
Possible Causes
- 1Burnt/faulty bulb
- 2Broken/shorted wiring
- 3Door switch issue
- 4Defective activation switch
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