B1647 Lost Communication with Side Satellite Sensor Bus Left

OBD2 Code: B1647

Description: Lost communication with side satellite sensor bus left.

Definition: This code indicates that there is a loss of communication between the vehicle’s main control module and the side satellite sensor on the left side. This could be due to wiring issues, a faulty sensor, or problems within the control module itself.

B1647: Lost communication with side satellite sensor bus left
Severity: Moderate

Common Causes

b1647 – Lost Communication with Side Satellite Sensor Bus Left

Common causes:

• Faulty side satellite sensor left
• Open or short in wiring harness between side satellite sensor left and control module
• Loose or corroded connections at the side satellite sensor left or control module
• Control module failure

Common Misdiagnosis

OBD2 Code: B1647

Description: Lost Communication with Side Satellite Sensor Bus Left

Common Misdiagnosis: Faulty side satellite sensor, when the issue may actually be due to wiring problems or a faulty control module.

Common Diagnostic Steps

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OBD2 Code: B1647

Description: Lost communication with side satellite sensor bus left

• Check for any other related trouble codes that might indicate a broader issue.
• Inspect the wiring and connectors between the side satellite sensor and the control module for any signs of damage, corrosion, or disconnection.
• Test the voltage and ground connections at the sensor to ensure they are within specifications.
• Use a scan tool to monitor data from the side satellite sensor to verify if it is transmitting signals correctly.
• If possible, perform a continuity test on the communication lines between the sensor and control module.
• Replace or repair any damaged wiring or connectors as necessary.
• If all else fails, consider replacing the side satellite sensor itself if it is determined to be faulty.