Broken or chafed wires in the door jamb harness where the wiring flexes; Failed passenger-side mirror motor or internal position sensor; Corroded or loose connector at the mirror assembly or door module; Faulty mirror adjustment switch or switch pack; Failed door control module or body control module (BCM) driver circuit; Blown fuse or poor ground connection for the mirror circuit

DTC codes / B06xx · Airbags, seats, doors, lights and comfort systems / B0601

B0601Mirror Adjustment Passenger Side Circuit

Q: What does code B0601 mean?

Mirror Adjustment Passenger Side Circuit. B0601 is a body code indicating that the passenger-side mirror adjustment circuit has a fault, typically an open, short, or excessive resistance detected by the door control module or body control module (BCM). The computer monitors the voltage or current on the mirror motor control wires and sets this code when the expected electrical signature is not present during a mirror adjustment command.

B0601 is a body code indicating that the passenger-side mirror adjustment circuit has a fault, typically an open, short, or excessive resistance detected by the door control module or body control module (BCM). The computer monitors the voltage or current on the mirror motor control wires and sets this code when the expected electrical signature is not present during a mirror adjustment command.

SystemBody

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

Passenger-side mirror does not move in one or more directions when adjusted
Mirror moves slowly or erratically compared to the driver-side mirror
Mirror adjustment switch feels unresponsive or requires multiple presses
Memory mirror function fails to return to the saved position
Often no symptoms besides the warning light if the fault is intermittent

Common causes, most likely first

Broken or chafed wires in the door jamb harness where the wiring flexes
Failed passenger-side mirror motor or internal position sensor
Corroded or loose connector at the mirror assembly or door module
Faulty mirror adjustment switch or switch pack
Failed door control module or body control module (BCM) driver circuit
Blown fuse or poor ground connection for the mirror circuit

How to diagnose and fix it

Check the fuse and ground connections for the passenger-side mirror circuit
Inspect the door jamb wiring harness for chafed, broken, or corroded wires
Disconnect the mirror connector and check for battery voltage and ground on the control wires while operating the switch
Test the mirror motor directly with jumper wires to confirm it moves in both directions
Check the mirror adjustment switch for continuity and correct signal output
If wiring and motor are good, test the door module outputs with a scan tool and wiring diagram
Replace the faulty component (motor, switch, module, or harness) and clear the code

Door jamb wiring often the real culprit

The door jamb harness is the most common failure point because constant flexing breaks the copper strands inside the insulation, which can look fine until you wiggle the harness.
A mirror that moves in one direction but not the other often points to a failed motor winding or a broken wire in the switch-to-motor path, not a module failure.
Some vehicles set B0601 when the mirror position sensor inside the mirror assembly fails, even though the motor still works, because the module cannot confirm the mirror reached its commanded position.
Aftermarket mirror replacements sometimes have different resistance values that trigger this code even though the mirror functions normally, so always verify the replacement part matches the original specification.
A weak or failing battery can cause intermittent B0601 codes because the module may not have enough voltage to drive the mirror motor during adjustment commands.

Can I keep driving with B0601?

The vehicle remains safe to drive because the passenger-side mirror can usually be adjusted manually, but you should avoid relying on the power adjustment until the fault is repaired. If the mirror is stuck in a position that blocks your view, adjust it by hand before driving.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.