What Does B2314 Mean?
This code indicates the Body Control Module (BCM) has detected a short to battery voltage in the feedback potentiometer circuit for the passenger side mirror's horizontal (left-right) adjustment motor. The potentiometer provides position feedback to the BCM, and when voltage on this signal circuit exceeds normal parameters due to a short to battery power, this fault is triggered. This prevents the BCM from accurately determining or controlling the mirror's horizontal position.
Common Causes
40%
Damaged or chafed wiring harness in the door jamb area causing short to power wire
30%
Failed mirror position feedback potentiometer with internal short to power supply
20%
Corroded or damaged mirror connector allowing terminal cross-contact with power pin
10%
Failed Body Control Module with internal short on feedback circuit
Diagnostic Steps
1
Step 1: Visually inspect the wiring harness through the door jamb area and at the mirror connector for visible damage, chafing, pinching, or corrosion. Flex the harness while monitoring for intermittent code setting.
2
Step 2: Disconnect the passenger side mirror connector and measure voltage on the horizontal feedback potentiometer signal wire at the vehicle harness side with ignition on. Reading should be 0V; battery voltage confirms a short to power in the harness.
3
Step 3: If Step 2 shows no voltage, measure resistance between the feedback signal pin and battery voltage pin at the mirror connector (mirror side). Resistance should be greater than 10k ohms; low resistance indicates failed potentiometer in mirror assembly.
4
Step 4: With mirror disconnected, command mirror movement using scan tool bidirectional controls while monitoring BCM data. If fault returns with mirror disconnected, suspect BCM internal fault. If fault clears, replace mirror assembly and retest all mirror functions to verify repair.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to battery voltage in the feedback potentiometer circuit for the passenger side mirror's horizontal (left-right) adjustment motor. The potentiometer provides position feedback to the BCM, and when voltage on this signal circuit e...
The most common cause of B2314 (Mirror Passenger Horizontal Feedback Potentiometer Circuit Short to Battery) is: Damaged or chafed wiring harness in the door jamb area causing short to power wire
Typical repair costs for B2314 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects power mirror adjustment functionality. The mirror can typically be manually adjusted if needed, though passenger side mirror position control will not function properly until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2314 to identify the root cause.
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Quick Info
Category
Body
System
Body/Comfort Systems - Power Mirror Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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