B2659 Ford Code - Courtesy Switch Fault
Quick Answer
For vehicles equipped with Keyless Entry System (RKE), the vehicle security module sends an interior lamps ON request to the Instrument Cluster Module (ICM) through UART Based Protocol (UBP) whenever a door has been opened, the unlock button has been pressed on the remote transmitter, or when an unlock request has been entered with the keyless keypad (if equipped). Common causes include Blown Courtesy Lamp Bulb, Faulty Door Ajar Switch, Faulty Interior Lamp Switch. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B2659 Ford indicates Courtesy Switch Fault.
- Common causes
- Common causes include Blown Courtesy Lamp Bulb, Faulty Door Ajar Switch, Faulty Interior Lamp Switch.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B2659 Ford Description
For non-RKE vehicles, the ICM energizes the circuit when a door has been opened, which provides power to the interior lamps. The interior lamps can also be turned ON or OFF with the interior lamp switch. The interior lamps are grounded through the circuit, and will remain illuminated until the ICM removes voltage from the circuit.
What are the Possible Causes of the DTC B2659 Ford?
- Blown Courtesy Lamp Bulb
- Faulty Door Ajar Switch
- Faulty Interior Lamp Switch
- Interior Lamp Switch harness is open or shorted
- Interior Lamp Switch circuit poor electrical connection
- Faulty Instrument Cluster Module (ICM)
How to Fix the DTC B2659 Ford?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2659 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B2659 Ford Code
What does the OBDII code B2659 Ford indicate?
B2659 indicates a fault with the courtesy switch, which is used to control interior lights and other features related to door operation.
What are the common symptoms of a B2659 code?
Symptoms may include interior lights not functioning properly, doors not unlocking, or features like remote start not working as intended.
What could cause the B2659 code to trigger?
Common causes include a faulty courtesy switch, wiring issues, or problems within the Body Control Module (BCM).
How can I diagnose a B2659 code?
To diagnose, check the courtesy switch operation, inspect wiring for damage or corrosion, and use a multimeter to test for continuity in the circuit.
Are there any simple repairs I can do for a B2659 code?
You can start by inspecting and cleaning the courtesy switch connections, replacing a damaged switch, or repairing any broken wires.
Is it safe to drive with a B2659 code?
While it may not affect vehicle drivability, it can lead to issues with interior lights and security features, so it's best to address it promptly.
How do I clear the B2659 code after repairs?
You can clear the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes, but ensure the underlying issue is fixed first.
Can a faulty courtesy switch affect other systems in the vehicle?
Yes, since the courtesy switch is linked to the BCM, a fault can affect related features such as door locks, alarm systems, and interior lighting.
Should I take my vehicle to a mechanic for a B2659 code?
If you're not comfortable performing the diagnostics or repairs yourself, or if the problem persists after basic troubleshooting, it’s advisable to consult a mechanic.
Discuss the causes and fixes for B2659 Ford OBDII Code
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