Volvo All Engines (2010 Emissions) Fault Code: SPN 84 FMI 19 PID: 84 Wheel-Based Vehicle Speed

This signal is sent from the (VECU) Vehicle Electronic Control Unit to the Cluster to present the actual vehicle speed. It is also used by the maximum speed limitation. The maximum speed limit can vary depending on customer option.

Conditions for diagnostic trouble code (DTC):
1) This fault can be caused by an ABS/EBS wheel speed calibration error, it is important to exit this fault tracing and check the ABS/EBS wheel speed calibration before continuing
2) Vehicle speed deemed inaccurate by VECU

Observable symptoms
1) Speedometer shows no vehicle speed

Probable cause
1) Vehicle speed sensor
2) Vehicle Control Unit (VECU)
3) ABS/EBS Wheel Speed Calibration Error

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