B0107 Code Symptoms, Causes, Diagnosis, Repair & Prevention Tips

B0107 Code – Symptoms, Causes, and How to Repair the Issue

Drivers first notice that the washer dedicated to cleaning the forward‑facing LIDAR sensor never activates, even though the main windshield washer works. The instrument cluster may illuminate a B0107 warning light, and the vehicle’s driver‑assist systems that rely on a clear LIDAR view (adaptive cruise, lane‑keep) can become less reliable. Because the LIDAR sensor is a safety‑critical component for many driver‑assist functions, the fault is flagged immediately by the Body Control Module (BCM).

Symptoms

• LIDAR washer does not spray when the dedicated button or menu command is selected.
• B0107 warning indicator remains illuminated on the dash or in the instrument cluster.
• Reduced LIDAR performance – adaptive cruise control may disengage, lane‑keeping assistance may issue warnings, or the forward‑looking camera may display a “sensor obstructed” message.
• No effect on engine, transmission, or other vehicle systems – the fault is isolated to the washer circuit and the BCM that monitors it.

These signs appear suddenly and persist until the underlying communication or actuator issue is resolved.

Why LIDAR Washer Actuator B Problems Occur

Faulty Actuator Motor or Mechanical Jam

The actuator that drives the washer nozzle can seize due to corrosion, debris, or internal winding failure. When the motor cannot turn, the BCM registers an open‑circuit condition and stores B0107.

Wiring Harness Damage or Corrosion

The circuit between the BCM and the actuator passes through the vehicle’s front bulkhead. Pin‑point damage, chafed insulation, or moisture intrusion creates high resistance or intermittent connectivity, prompting the BCM to flag a fault.

Body Control Module (BCM) Communication Failure

The BCM monitors the actuator’s current draw and status signals. Corrupted firmware, internal component degradation, or a loss of CAN‑bus integrity can prevent the BCM from correctly interpreting the actuator’s state, resulting in B0107 even if the actuator itself is functional.

Software or Calibration Mismatch

After a vehicle update or a replacement of related modules, the BCM’s calibration tables for the LIDAR washer may become out of sync. The module may misinterpret normal current levels as a fault, storing B0107.

Diagnostic and Repair Procedures

1. Retrieve and Clear Codes

Connect a factory‑level scan tool to the OBD‑II port, read the B0107 code, and note any accompanying codes (e.g., B0108, B0109). Clear the codes and perform a live data stream of the LIDAR washer circuit.

1. Verify Actuator Power and Ground

Using a multimeter, measure voltage at the actuator connector while the washer command is issued. A steady 12 V on the power pin and a solid ground indicate proper supply. Absence of voltage points to a BCM output fault or wiring break.

1. Continuity Test the Wiring Harness

Disconnect the actuator connector and perform a resistance check between the BCM pins and the connector terminals. Resistance greater than 0.5 Ω suggests corrosion or a broken conductor.

1. Actuator Bench Test

If power and ground are present, apply 12 V directly to the actuator motor leads. The nozzle should spray within a second. Failure confirms a defective actuator motor.

1. BCM Communication Check

Run a CAN‑bus diagnostic on the BCM. Look for “no communication” or “invalid data” messages on the LIDAR washer channel. A failed communication test often means the BCM firmware is corrupted or the module has internal damage.

1. Re‑program or Re‑calibrate the BCM

If the wiring and actuator test fine, update the BCM software to the latest OEM version and perform the LIDAR washer calibration procedure outlined in the service manual. Many B0107 occurrences resolve after a fresh flash.

1. Replace the BCM (When Necessary)

When the BCM does not accept a re‑flash, continues to report B0107 after a full wiring and actuator verification, or exhibits multiple unrelated BCM codes, replacement is the prudent path. A VIN‑matched replacement ensures correct encryption keys, security access, and CAN‑bus identifiers.

Cost considerations

• Wiring and connector repair: $50‑$150 for labor and materials.
• Actuator motor replacement (if the motor itself is defective): $120‑$250 plus $80‑$120 labor.
• BCM re‑programming: $80‑$150 labor; OEM flash tools may be required.
• BCM replacement (including programming): $400‑$650 for the module plus $150‑$250 labor. Flagship One provides VIN‑matched units that arrive pre‑programmed, reducing installation time.

When Replacement Makes Sense

Repeated BCM communication failures, multiple concurrent BCM‑related codes, or an inability to successfully flash the existing module indicate that repair will be temporary. Modern control modules are tightly integrated with vehicle security, immobilizer, and driver‑assist networks. Selecting a replacement is not merely a hardware swap; it requires exact software alignment to the vehicle’s VIN and security architecture.

Flagship One specializes in VIN‑matched control modules, providing a plug‑and‑drive solution backed by warranty. Because the BCM interacts with encrypted CAN‑bus messages and safety‑critical systems, only a correctly programmed module will restore full functionality without triggering additional faults. Flagship One’s units are pre‑programmed to the vehicle’s VIN before shipping, eliminating dealer‑only programming steps and ensuring immediate compatibility.

Preventive Maintenance

• Inspect the washer nozzle and actuator regularly for buildup of road grime or salt. Clean the nozzle tip with a soft brush and a mild solvent every 6 months, especially after winter service.
• Check connector seals during routine front‑end inspections. Replace cracked or water‑intruded seals to keep the wiring harness dry.
• Run a full BCM scan at major service intervals (every 30,000 mi or 24 months). Early detection of minor resistance changes can prevent a full B0107 fault.
• Avoid using abrasive cleaning agents on the LIDAR sensor surface; a damaged sensor can cause the washer system to over‑compensate, stressing the actuator.
• Maintain proper battery voltage. Low system voltage can cause the BCM to misinterpret actuator current draw, so keep the battery health above 12.4 V at rest.