B2355 — Passenger Mirror Horizontal / Vertical Feedback Potentiometer Circuit Open #

Note: The wording of this code description may vary depending on the OEM (Original Equipment Manufacturer).

• B2355 — Passenger Mirror Feedback Potentiometer Circuit Open (Ford)
• B2355 — Right Mirror Position Sensor Circuit Open (GM/Chevrolet)
• B2355 — Mirror Horizontal/Vertical Feedback Circuit Malfunction (Toyota/Lexus)
• B2355 — Passenger Mirror Position Potentiometer Circuit Open (Chrysler/Jeep)

Summary of DTC B2355 #

The B2355 diagnostic trouble code (DTC) indicates the vehicle’s control module has detected an open circuit in the feedback potentiometer of the passenger side power mirror. A potentiometer is a type of variable resistor used by the mirror assembly to report its horizontal and vertical position to the control module. When this circuit is “open,” it means the electrical path is interrupted, preventing the system from knowing the exact angle or position of the mirror. This code is typically set by the Body Control Module (BCM) or the Door Control Module after repeated failed self-tests or loss of signal continuity. While this issue does not usually affect vehicle drivability, it can hinder proper mirror adjustment and memory functions.

Common Symptoms for Code B2355 #

When DTC B2355 is present, drivers will often notice issues related to mirror adjustment or memory recall. These symptoms can range from subtle to immediately obvious, depending on how the system is designed. Here are some of the most frequent signs:

• Passenger mirror won’t move horizontally or vertically when using the adjustment switch
• Loss of memory function for the passenger mirror (if equipped)
• Mirror may move erratically or only in one direction
• Warning message or indicator for mirror malfunction, if the vehicle is equipped with advanced diagnostics
• No response from the passenger mirror switch

Likely Causes for Code B2355 #

An open circuit in the feedback potentiometer for the passenger side mirror can stem from several root causes. Diagnosing the right one is key for an effective repair. Here are the most common causes, listed in order of likelihood:

1. Broken or pinched wiring in the mirror harness, especially at the hinge or door area
2. Unplugged or corroded connector at the mirror or door module
3. Faulty mirror potentiometer (the sensor inside the mirror assembly itself)
4. Faulty door control module or body control module (rare, but possible)
5. Aftermarket mirror installation lacking feedback circuit compatibility

Step-by-Step Diagnostic Guide for B2355 #

A methodical approach is essential for pinpointing the source of DTC B2355. Rushing diagnostics can lead to unnecessary part replacements. Follow these steps:

• 1. Perform a scan tool test to verify the code and check for any related codes (especially wiring or module communication codes).
• 2. Inspect mirror function from inside the vehicle; note if the mirror moves at all or in certain directions only.
• 3. Visually inspect the mirror harness at the door hinge area for pinched, broken, or frayed wires.
• 4. Check connectors at the mirror and inside the door for corrosion, looseness, or damage.
• 5. Using a multimeter, test for continuity in the potentiometer feedback circuit from the mirror to the control module. Open circuits will show infinite resistance.
• 6. If the wiring and connectors are intact, test the potentiometer inside the passenger mirror for proper resistance change as the mirror is moved (refer to the OEM specs for values).
• 7. If all else checks out, consider testing or substituting the door control module or BCM as a last resort.

Possible Repairs for B2355 #

Once the root cause has been identified, repairs should directly address the fault to restore mirror function and clear the code. Depending on your findings, consider these repairs:

• Repair or replace damaged wiring between the mirror and the door/module
• Clean, tighten, or replace connectors at the mirror or in the door
• Replace the passenger mirror assembly if the potentiometer is confirmed faulty (often the potentiometer is not serviceable separately)
• Replace the door control module or BCM if confirmed defective after all other tests
• Install the correct OEM-compatible mirror if an aftermarket part is missing required feedback circuitry

Is It Safe to Drive with Code B2355? #

Yes, you can drive with this code present, but with limitations. The B2355 code does not affect critical driving systems such as engine, brakes, or safety features. However, your passenger mirror adjustment may not function, which can reduce visibility and make it harder or impossible to adjust the mirror for different drivers or situations. For safety, manually adjust the mirror to the best possible position before driving, and repair the issue as soon as practical, especially if you rely on memory functions or frequent mirror adjustments.

Vehicles Most Commonly Affected by B2355 #

This code is most frequently reported on vehicles equipped with power-adjustable passenger mirrors and mirror memory functions, especially those built from the late 1990s onward. It is commonly found in:

• Ford: Explorer, F-150, Expedition, Taurus
• Chevrolet/GMC: Silverado, Tahoe, Suburban, Impala
• Toyota/Lexus: Camry, Avalon, RX, ES
• Chrysler/Jeep: Grand Cherokee, 300, Pacifica
• Honda/Acura: Odyssey, Accord, MDX (select models with memory mirrors)

Common Mistakes and Best Practices for B2355 #

Misdiagnosis is common with mirror-related codes, especially if the technician or DIYer skips essential steps or assumes the mirror assembly is always at fault. Here are frequent errors and tips to avoid them:

• Replacing the entire mirror assembly before checking wiring and connectors
• Overlooking harness damage at the door hinge area, where wires flex and break over time
• Not checking for corrosion inside connectors, which can cause intermittent opens
• Installing non-OEM or incompatible aftermarket mirrors that lack proper feedback potentiometers
• Best practice: Always use a scan tool to confirm code presence and clear codes after repair, verifying the fix with a mirror function test

Quick FAQ for DTC B2355 #

Here are concise answers to some of the most common questions about this code:

• Q: Can I adjust the passenger mirror manually if the motor doesn’t work?
  A: On most vehicles, power mirrors can still be adjusted by gently moving the glass, but take care not to damage the mechanism. Check your owner’s manual for guidance.
• Q: Will replacing the mirror glass fix this code?
  A: No, the B2355 code is related to the feedback potentiometer or its wiring, not the glass itself. Replacing only the glass will not address the circuit fault.
• Q: Do I need to reprogram the mirror after replacement?
  A: On many newer vehicles with memory functions, yes — you may need to recalibrate or reprogram the mirror system using a scan tool. Consult your vehicle’s service manual or dealer for specifics.