DTC P0500: VSS Circuit Problem

Fig 1: DTC P0500 Detection Condition & Possible Causes Chart

Courtesy of MAZDA MOTORS CORP.

Diagnostic Procedure 

Fig 2: DTC P0500 Diagnostic Procedure Chart (Step 1-2)

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Fig 3: DTC P0500 Diagnostic Procedure Chart (Step 3-6)

Courtesy of MAZDA MOTORS CORP.