B1667 — Mirror Driver Up/Down Motor Stalled #

The code label may vary depending on the manufacturer.
Known label variations:

• Mirror Driver Up/Down Motor Stalled (Ford, Lincoln, Mercury)
• Door Mirror Vertical Motor Circuit Stalled (Nissan)
• Power Mirror Vertical Drive Malfunction (Hyundai/Kia)
• Mirror Height Adjustment Motor Stuck (Mazda)

Summary of DTC B1667 #

DTC B1667 identifies a problem with the driver-side power mirror up/down motor circuit. This code is triggered when the Body Control Module (BCM) detects that the mirror’s vertical movement motor has stalled, meaning it’s drawing excessive current or not responding as expected during operation. The BCM is the vehicle’s central module managing electronic body functions, including mirrors. A “stall” indicates the motor is unable to move, usually due to a mechanical or electrical fault. This code does not refer to the glass itself, but the mechanism controlling its vertical adjustment.

Common Symptoms for code B1667 #

A stalled mirror up/down motor can be inconvenient, but it rarely poses a safety risk. Symptoms are typically limited to the mirror’s inability to adjust vertically. If the BCM detects an electrical issue, you may also experience related accessory malfunctions. Here are the most common signs:

• Driver-side mirror does not move up or down when using the adjustment switch
• Mirror may be stuck in an unusable position
• Clicking, humming, or no sound when operating the mirror adjuster
• Other mirror directions (left/right) may still work
• In some cases, related warning lights or error messages may appear on the dashboard

Probable Causes of B1667 (most frequent first) #

Several issues can trigger the B1667 code. Understanding the order of likelihood helps prioritize your diagnosis and repair:

1. Failed up/down mirror motor (worn, seized, or burned out)
2. Obstructed mirror mechanism (ice, debris, or physical misalignment preventing movement)
3. Faulty mirror adjustment switch (worn contacts or internal failure)
4. Damaged wiring or connectors (open circuit, short to ground, or corrosion at the mirror assembly or switch)
5. BCM malfunction (rare, but possible if other body electronics are also affected)

Step-by-Step Diagnostic for B1667 #

Proper diagnosis ensures you replace only what’s necessary. Here’s a structured approach:

1. Verify the code with an OBD-II/EOBD scanner and check for related mirror or door module codes.
2. Test mirror movement using the adjustment switch. Listen for any noises or resistance.
3. Inspect the mirror for physical obstructions (ice, dirt, stuck objects).
4. Access the mirror motor wiring (usually inside the door panel). Check for loose, corroded, or damaged connectors.
5. Test the motor directly by applying 12V power and ground. If the motor does not move or makes unusual noise, it is likely defective.
6. Check the adjustment switch for continuity with a multimeter. Replace if readings are abnormal.
7. Inspect wiring harnesses between the switch, mirror, and BCM for continuity, shorts, or open circuits.
8. If all else checks out, consider BCM diagnostics (advanced, may require OEM scan tool).

Possible Repairs for B1667 #

Once you’ve pinpointed the issue, repairs can be straightforward. Only replace components after confirming the root cause:

• Replace the driver-side mirror up/down motor if it fails direct testing
• Remove any obstructions from the mirror mechanism and realign if necessary
• Replace the mirror adjustment switch if it’s faulty
• Repair or replace damaged wiring or connectors (clean corrosion, fix breaks or shorts)
• Update or replace the BCM if diagnosed as faulty (rare; consult OEM service information)

Is it Safe to Drive with B1667? #

Yes, you can drive with code B1667 present. This fault only affects the vertical movement of the driver’s power mirror. While it can be inconvenient—especially if you need to adjust the mirror for a different driver—it does not impact critical systems or overall safety as long as the mirror is set for good visibility. However, if you cannot adjust your mirror for a safe view, fix the issue promptly.

Vehicles Most Commonly Affected by B1667 #

While any vehicle with power mirrors can experience this code, it’s most frequently reported on:

• Ford (F-150, Explorer, Escape, Fusion)
• Lincoln (MKX, Navigator)
• Mercury (Mountaineer, Milan)
• Nissan (Altima, Maxima, Rogue)
• Hyundai/Kia (Sonata, Elantra, Optima, Sorento)
• Mazda (3, 6, CX-5)

Other OEM brands may use different code numbers or labels for similar faults.

Common Mistakes & Best Practices for B1667 #

Avoid unnecessary part replacements by following the diagnostic steps carefully. Here are typical errors and tips:

• Replacing the entire mirror assembly without testing the motor or switch first
• Overlooking simple obstructions (ice, debris) that can stall the motor
• Not checking for wiring issues, especially inside door harnesses subject to flexing
• Ignoring related codes that could suggest a larger BCM or circuit problem
• Not verifying repairs by clearing the code and confirming normal mirror operation

Quick FAQ for B1667 #

Have more questions? Here are some fast answers:

• Can I manually adjust the mirror if the motor is stalled? — On most modern vehicles, manual adjustment is difficult or impossible without damaging the mechanism. Check your owner’s manual.
• Will this code cause my inspection to fail? — Typically, no. Power mirrors are not part of most state safety or emissions tests, but always check local requirements.
• Does the whole mirror need replacement? — Not always. Often, just the motor or switch can be replaced separately at less cost.