B2318 Lincoln Code - Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
Quick Answer
Under normal operation, the exterior mirror control switch receives power and ground from the circuit. Common causes include Faulty Passenger Exterior Mirror, Passenger Exterior Mirror harness is open or shorted, Passenger Exterior Mirror circuit poor electrical connection. 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
- B2318 Lincoln indicates Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery.
- Common causes
- Common causes include Faulty Passenger Exterior Mirror, Passenger Exterior Mirror harness is open or shorted, Passenger Exterior Mirror circuit poor electrical connection.
- 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 B2318 Lincoln Description
The memory mirror system uses feedback potentiometers, located in the LH and RH exterior mirrors, in order to track the movement of the LH and RH exterior mirror motors. The DDM supplies the LH and RH exterior mirror feedback potentiometer reference voltage and ground through circuits. The DDM receives feedback from the LH and RH exterior mirror feedback potentiometer through left/right and up/down circuits.
What are the Possible Causes of the DTC B2318 Lincoln?
- Faulty Passenger Exterior Mirror
- Passenger Exterior Mirror harness is open or shorted
- Passenger Exterior Mirror circuit poor electrical connection
- Faulty Passenger Exterior Mirror Control Switch
- Faulty Driver Door Module (DDM)
- Faulty Driver Seat Module (DSM)
How to Fix the DTC B2318 Lincoln?
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 B2318 Lincoln 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 B2318 Lincoln Code
1. What does the OBDII code B2318 mean on a Lincoln vehicle?
B2318 indicates a problem with the passenger-side mirror's vertical feedback potentiometer circuit, specifically a short to the battery.
2. What are the common symptoms of the B2318 code on a Lincoln?
Symptoms may include the passenger-side mirror not adjusting vertically or moving erratically, and possibly a stored trouble code or warning light.
3. What causes the B2318 code in a Lincoln?
The code is typically caused by a short circuit in the mirror's vertical feedback potentiometer wiring, a faulty potentiometer, or a malfunctioning mirror control module.
4. How can I diagnose the B2318 code in my Lincoln?
Start by inspecting the wiring and connectors for damage or shorts. Use a multimeter to test the circuit for continuity and check the potentiometer for proper function.
5. Can the B2318 code be fixed without replacing the mirror?
Yes, if the issue is a wiring short or loose connection, repairing or replacing the affected wires or connectors can resolve the problem.
6. Is it safe to drive with the B2318 code on my Lincoln?
Yes, it’s generally safe to drive, but the passenger-side mirror's vertical adjustment may not function properly, impacting visibility and convenience.
7. How much does it typically cost to repair the B2318 code on a Lincoln?
Repair costs can range from $50 to $200, depending on whether the issue is wiring-related or if the mirror assembly or control module needs replacement.
8. Could a blown fuse cause the B2318 code?
A blown fuse is unlikely to cause this specific code, as it points to a short circuit in the potentiometer, not a complete power loss.
9. Can a software update fix the B2318 code in a Lincoln?
A software update is unlikely to resolve this issue, as it is typically a hardware-related problem involving wiring or the mirror assembly.
10. Do I need professional help to fix the B2318 code on my Lincoln?
If you’re experienced with automotive electrical systems, you can attempt the repair yourself. Otherwise, it’s best to consult a professional mechanic.
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