2006 Lincoln ZephyrFACTORY OEM SERVICE PROCEDURE

Cruise Control System DTCS

CRUISE CONTROL POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description Source Action
P0500 Vehicle Speed Error PCM REFER to the INTRODUCTION - GASOLINE article.
P0579 Cruise Control Multifunction Input A Circuit Range/Performance PCM GO to PINPOINT TEST C .
P0581 Cruise Control Multifunction Circuit High PCM GO to PINPOINT TEST C .
PO833 Clutch Pedal Switch B Circuit PCM GO to PINPOINT TEST D .
P1572 Brake Pedal Switch Circuit PCM GO to PINPOINT TEST B .
P1703 Brake Switch Out of Self-Test Range PCM GO to PINPOINT TEST B .
All other DTCs - PCM REFER to the INTRODUCTION - GASOLINE article to continue diagnosis.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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