B2326 — Mirror Driver Vertical Feedback Potentiometer Circuit Short to Battery

B2326 — Mirror Driver Vertical Feedback Potentiometer Circuit Short to Battery. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: corroded or loose connectors, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.

body electrical

Is it safe to drive?

Short-term driving is OK Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm B2326 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many B0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the body electrical system for damage, corrosion, chafing or poor contact.
Subsystem check Operate the affected function while watching its switch and motor PIDs in live data.
Subsystem check Inspect connectors and wiring at flex points (door jambs, tailgate hinges) — wires break there first.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm B2326 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B2326 (parts and labor, USD, independent shop rates): BCM repair or replacement: $300–$900; Replace the switch or actuator: $120–$450; Repair wiring or connectors: $80–$250. Overall, fixing B2326 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How do I diagnose B2326 myself?

Start with a scan: confirm B2326, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the body electrical system, and verify the suspect component against live data before buying parts.

Is it safe to drive with B2326?

Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

Will B2326 clear itself?

Sometimes B2326 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What are the symptoms of B2326?

Drivers most often notice: warning light on the dashboard, no impact on engine operation in most cases, the affected function (locks, windows, lighting, wipers) works intermittently or not at all.

What is the most common cause of B2326?

The most common causes are: corroded or loose connectors, body control module (BCM) fault, faulty switch, motor or actuator of the affected system.

When your vehicle's diagnostic system flags code B2326, it's telling you that something in the driver-side mirror's vertical positioning circuit has gone wrong. Specifically, the body control module has detected a short to battery voltage on the mirror's feedback potentiometer circuit. This is a body electrical fault, not an engine or drivetrain problem, so you won't feel anything strange while driving — but some mirror or related body function may stop responding properly.

The driver-side mirror assembly contains a small electric motor that moves it up and down, along with a feedback potentiometer that tracks its position. When you adjust the mirror, the potentiometer sends a voltage signal back to the body control module indicating where the mirror currently sits. The BCM expects that voltage to stay within a specific range. If the circuit shorts to battery voltage — meaning it receives power when it shouldn't — the module logs B2326 and illuminates the warning light. Most manufacturers require this condition to appear over multiple drive cycles before they set the code permanently, which gives intermittent issues a chance to clear on their own before triggering a permanent fault.

Symptoms of B2326

When B2326 is active, you may notice one or more of the following:

A check engine, service body system, or similar warning lamp turns on in the instrument cluster
Power mirror adjustment works only intermittently, or stops entirely in the vertical direction
Other body functions linked to the same control module (windows, locks, or lighting) act erratically or fail
The mirror may move on its own or fail to hold a stored memory position
No effect on engine performance, fuel economy, or transmission behavior — B2326 is strictly a body system code
After clearing the code, the problem may return within one or more drive cycles

Common Causes of B2326

The root cause behind B2326 typically falls into one of these categories, listed from most to least likely:

Corroded, damaged, or loose electrical connectors at the mirror assembly or BCM
A failed driver mirror vertical feedback potentiometer or associated motor
Chafed or broken wiring inside the door jamb, where wires flex every time you open or close the door
A faulty body control module unable to process the potentiometer signal correctly
Water intrusion in the mirror housing or door wiring, causing a short to the battery feed
A defective switch on the mirror control panel, sending incorrect signals down the circuit
Aftermarket modifications to the mirror or door wiring that introduce a short condition

How to Diagnose B2326

Working through this code methodically keeps you from replacing good parts. Follow these steps:

Plug in a quality OBD2 scanner and pull all stored codes. Record B2326 along with any other body-related codes (B-codes) that may point to the same circuit. Save the freeze frame data — it captures engine rpm, load, temperature, and speed at the moment the BCM detected the fault, which helps you recreate the exact conditions for retesting.
Check manufacturer technical service bulletins for your specific make and model. Many body electrical codes have published updates, software flashes, or known defects documented by the factory.
Perform a thorough visual inspection of the mirror wiring harness, especially where it passes through the driver door hinge area. Look for cracked insulation, broken strands, corrosion, and any signs of water entry. Wiggle the harness while monitoring live data if possible.
Test the mirror potentiometer circuit with a multimeter. Compare your readings against the voltage range specified in the service manual for that circuit. A short to battery will usually show battery voltage on a signal line that should read much lower.
Inspect the mirror control switch and the connectors at both the switch panel and the mirror motor. Clean any corrosion with electrical contact cleaner and ensure all terminals are seated firmly.
Clear the code and complete a drive cycle that includes the conditions recorded in the freeze frame. If B2326 returns, the fault is confirmed and not intermittent.

Repair Options and Cost

Once you've identified the failing component, repair costs vary by part and labor. Typical scenarios for B2326 at independent shop rates (parts and labor in USD):

Body control module repair or replacement: $300–$900
Replacement of the mirror switch, motor, or potentiometer assembly: $120–$450
Wiring harness repair or connector replacement: $80–$250

Start with the least expensive possible cause — wiring and connectors — before spending on a new BCM or mirror assembly.

Total Repair Cost for B2326

Most repairs for this code fall somewhere between $80 and $900 depending on what actually failed. Simple wiring repairs at the door jamb tend to cost the least, while a full BCM replacement sits at the high end. Getting a confirmed diagnosis before buying parts is the single best way to control your total spend. Skip the expensive modules unless testing conclusively points to them.

Can You Drive with B2326?

In most cases, B2326 poses no immediate threat to drivability. The code affects body electronics, not the engine, transmission, or brakes. However, if the mirror adjustment failure also disables related systems like exterior lighting or wipers — or if the fault stems from a central locking problem — there are safety situations where you want that function working. Use your best judgment, and prioritize fixing it before driving in poor weather or unfamiliar areas.