B2320 Code: Mirror Driver Horizontal Feedback Potentiometer Circuit Failure

🟢 Low severity · drivable

Safe to drive. This affects only the power mirror position feedback.

What B2320 means

The horizontal position sensor (potentiometer) in the driver's power mirror has a fault, so the mirror adjustment system can't read the mirror's position.

Symptoms

Power mirror adjusting erratically
Mirror won't return to saved position
No driving symptoms

Common causes

most common: Faulty mirror position potentiometer
common: Damaged mirror wiring or connector
less common: Faulty mirror motor

How to fix it

Fix	DIY?	Typical cost
Check the mirror wiring and connector	Yes	$0–50
Replace the power mirror assembly	Yes	$100–300

Frequently asked questions

Can I drive with a B2320 code?

Yes. It only affects the power mirror position feedback.

What is the most common cause of B2320?

A faulty mirror position potentiometer, usually fixed by replacing the mirror assembly.

How much does it cost to fix a B2320?

Typically $100–$300 for a replacement power mirror.

Related codes

B2321

B2321 Code: Mirror Driver Horizontal Feedback Potentiometer Circuit Open

B2322

B2322 Code: Mirror Driver Horizontal Feedback Potentiometer Circuit Short to Battery

B2323

B2323 Code: Mirror Driver Horizontal Feedback Potentiometer Circuit Short to Ground

Updated 2026-08. This page is informational and not a substitute for professional diagnosis.