P0609 Control Module VSS Output B Malfunction 2

OBD-II Code: P0609

Description: Control Module VSS Output B Malfunction

Definition: The P0609 code indicates that there is a malfunction in the vehicle speed sensor (VSS) output circuit from the control module. This could be due to a fault in the wiring, connectors, or the control module itself.

P0609 – Control Module VSS Output B Malfunction 2

Typical Severity: Moderate

Common Causes

P0609 – Control Module VSS Output B Malfunction 2

Common Causes:

• Faulty vehicle speed sensor
• Defective control module
• Wiring or connection issues between the control module and vehicle speed sensor
• Corrosion in the wiring harness or connectors

 

Common Misdiagnosis

OBD2 Code: P0609

Description: Control Module VSS Output B Malfunction

Common Misdiagnosis: Replacing the vehicle speed sensor (VSS) without checking the wiring or connections.

 

Common Diagnostic Steps

OBD2 Code: P0609

Description: Control Module VSS Output B Malfunction

• Check for any other diagnostic trouble codes (DTCs) that may be related to the vehicle speed sensor (VSS).
• Inspect the wiring and connectors associated with the VSS for damage, corrosion, or disconnection.
• Test the VSS itself using a multimeter to ensure it is functioning correctly.
• Verify the integrity of the control module’s ground and power supply connections.
• Use an OBD2 scanner to monitor live data from the VSS to check for irregularities in speed readings.
• If applicable, update or reprogram the control module software as per manufacturer recommendations.
• If all else fails, consider replacing the control module after confirming it is faulty through proper diagnostics.