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Home >> Ford >> 2017 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) - DTC P0210 - P0607 >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> P0503 - Vehicle Speed Sensor A Intermittent/Erratic/High

P0503 - Vehicle Speed Sensor A Intermittent/Erratic/High

P0503 - VEHICLE SPEED SENSOR A INTERMITTENT/ERRATIC/HIGH

Description:  This DTC sets when an incorrect or noisy VSS signal is detected. Vehicle speed data is received from either the VSS or the anti-lock brake system (ABS) module.
Possible Causes: 
  • Noisy VSS input signal from radio frequency interference or electromagnetic interference external sources, such as ignition components or the charging circuit
  • Damaged VSS or driven gears
  • Damaged VSS wiring harness or connectors
  • Concern in the modules or circuits connected to the VSS circuit
  • Aftermarket add-on
Diagnostic Aids:  Monitor the VSS PID while driving the vehicle, and check for intermittent vehicle speed indication. Verify the ignition and charging systems are functioning correctly.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
F-650/F-750,
F-Series Super Duty,
Fiesta,
Fusion,
KA,
Motorhome/Stripped Chassis/Step Van		 GO to Pinpoint Test DF .
Manual Transmission GO to Pinpoint Test DP .
All others The PCM uses information from the ABS module and the transmission control module (TCM) to calculate vehicle speed. Check these modules for DTCs.
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