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DTC P0500 (VSP): Vehicle Speed Sensor (VSS) Malfunction

  1. If speedometer operation is abnormal, check power supply and ground circuit to combination meter and connector between combination meter and vehicle speed sensor (VSS). Repair or replace parts as necessary. If speedometer operation is normal, go to next step.
  2. Turn ignition off. Disconnect TCM connector. Turn ignition on. Using DVOM connected to chassis ground, backprobe ECM connector terminal No. 83. See appropriate wiring diagram in WIRING DIAGRAMS article. If voltage reading is less than 2 volts, go to next step. If voltage reading is 2 volts or more, check for open in wiring between ECM and combination meter connector, poor contact in ECM connector, poor contact in combination meter connector or poor contact in coupling connectors between ECM and combination meter connector.
  3. Turn ignition off. Disconnect ECM connector. Check resistance between ECM connector terminal No. 83 and chassis ground. If resistance is more than 10 ohms, repair poor contact in ECM connector. If resistance is 10 ohms or less, repair short in wiring between ECM and combination meter connectors.
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