B1647: Code Meaning, Causes, Symptoms, & Tech Notes

|What are the Possible Causes of the Code B1647?

Faulty Side Airbag Sensor Left (LH)
Faulty Rear Airbag Sensor Left (LH)
Side Airbag Sensor Left harness is open or shorted
Side Airbag Sensor Left circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

|How to Fix the B1647 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

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|What is the Cost to Diagnose the Code B1647?

Labor: 1.0

The cost to diagnose the B1647 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Car have Safety Recalls? → Check here

|What are Code B1647 Possible Symptoms?

Air Bag Warning Light ON

|What Does the B1647 Code Mean?

The Side Collision Sensor Left (LH) circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor LH, and Rear Airbag Sensor LH. The Side Airbag Sensor LH and Rear Airbag Sensor LH detect impacts to the vehicle and send signals to the Center Airbag Sensor Assembly to determine if the airbag should be deployed. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Side Collision Sensor LH circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH).

B1647 Code - Lost Communication With Side Satellite Sensor Bus Left

|Need more Information on the B1647 Code?

Need more information on how to fix the B1647 code? Get Access to Factory Service Manuals

|Code B1647 Information for Specific Makes

B1647 Acura Passenger Door LF Antenna Circuit Short
B1647 Chrysler Rear Right Turn Control Circuit Low
B1647 Dodge Rear Right Turn Control Circuit Low
B1647 Honda Passenger Door LF Antenna Circuit Short
B1647 Jeep Rear Right Turn Control Circuit Low
B1647 Lexus Lost Communication With Side Satellite Sensor Bus Left 📷
B1647 RAM Rear Right Turn Control Circuit Low
B1647 Scion Lost Communication With Side Satellite Sensor Bus Left 📷
B1647 Toyota Lost Communication With Side Satellite Sensor Bus Left 📷

|Need Help with the B1647 Code?

Get the B1647 code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.