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Diagnostic Trouble Code Chart

If a malfunction code is indicated during the DTC check, check the circuit listed for that code in the table below, and proceed to an appropriate page.

DIAGNOSTIC TROUBLE CODE CHART

DTC No.
(See)
Circuit Inspection Trouble Area
P0500/21 ( DTC P0500/21 VEHICLE SPEED SENSOR "A" DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH ) Vehicle speed sensor "A"
  • Combination meter
  • Vehicle speed sensor
  • Wire harness or connector
  • ECM
P0503/23 ( DTC P0500/21 VEHICLE SPEED SENSOR "A" DTC P0503/23 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH ) Vehicle speed sensor "A" Intermittent / Erratic / High
P0571/52 ( DTC P0571/52 BRAKE SWITCH "A" CIRCUIT ) Brake switch "A" circuit
  • Stop light switch
  • Wire harness or connector
  • ECM
P0607/54 ( DTC P0607/54 CONTROL MODULE PERFORMANCE ) Control module performance
  • ECM