Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Lincoln Aviator RWDFACTORY OEM SERVICE PROCEDURE
Cruise Control System DTCS
CRUISE CONTROL (SPEED CONTROL ACTUATOR) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTCs | Description | Source | Perform Test |
|---|---|---|---|
| P0500 | Vehicle Speed Error | Powertrain control module (PCM) | REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE . |
| P1565 | Speed Control Command Switches High/Out of Range | PCM | Go To PINPOINT TEST A . |
| P1566 | Speed Control Command Switches Low/Out of Range | PCM | Go To PINPOINT TEST B . |
| P1567 | NGSC Drive Fault Output Circuit | PCM | Go To PINPOINT TEST C . |
| P1568 | NGSC Actuator Self-Test Failure Unable to Hold Speed | PCM | Go To PINPOINT TEST D . |
| P1572 | Brake On/Off Failure | PCM | Go To PINPOINT TEST E . |
| P0703 | Brake Switch Input Malfunction | PCM | Go To PINPOINT TEST E . |
Factory Service Tools
Use the Manual With the Right Hardware
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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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