What Does B2313 Mean?
This code indicates that the Body Control Module (BCM) has detected an open circuit in the feedback potentiometer for the passenger side mirror's horizontal (left-right) adjustment mechanism. The potentiometer provides position feedback to the BCM, allowing precise mirror adjustment control. An open circuit means no signal is being received, preventing the BCM from determining or controlling the mirror's horizontal position.
Common Causes
45%
Broken or corroded wiring between mirror motor assembly and door harness connector, especially in door hinge flex area
30%
Failed horizontal axis potentiometer inside mirror motor assembly
15%
Corroded or damaged mirror connector terminals causing intermittent open circuit
10%
Failed BCM or internal BCM circuit board issue affecting mirror feedback circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of passenger mirror connector at door and behind mirror housing for corrosion, damaged pins, or water intrusion. Check mirror adjustment switch operation for horizontal movement response.
2
Step 2: Using a digital multimeter, backprobe the horizontal potentiometer feedback wire at the mirror connector (consult wiring diagram for pin identification) and measure resistance while manually moving mirror horizontally. Should see smooth resistance change (typically 500-5000 ohms range); infinite resistance indicates open circuit.
3
Step 3: Disconnect mirror connector and inspect wiring through door hinge area for breaks, chafing, or damage. Perform continuity test from mirror connector through door harness to BCM connector. Repair any breaks or damaged wiring found.
4
Step 4: If wiring is intact, remove mirror assembly and test potentiometer directly at motor leads. If potentiometer shows open circuit, replace mirror motor assembly or complete mirror unit as required.
5
Step 5: After repair, clear codes, cycle mirror through full horizontal range multiple times, and verify smooth operation. Re-scan for codes to confirm repair success and proper feedback signal to BCM.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected an open circuit in the feedback potentiometer for the passenger side mirror's horizontal (left-right) adjustment mechanism. The potentiometer provides position feedback to the BCM, allowing precise mirror adjustment control. An open...
The most common cause of B2313 (Mirror Passenger Horizontal Feedback Potentiometer Circuit Open) is: Broken or corroded wiring between mirror motor assembly and door harness connector, especially in door hinge flex area
Typical repair costs for B2313 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 mirror adjustment functionality and does not impact vehicle operation or safety systems. Repair at convenience, though proper mirror adjustment is important for visibility and safe lane changes.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2313 to identify the root cause.
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Quick Info
Category
Body
System
Power Mirror System
Difficulty
Type
Generic (SAE)
Recommended Tools
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