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 LS 3.0 SFACTORY OEM SERVICE PROCEDURE
Cruise Control Systems DTCS
POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Go To Pinpoint Test |
|---|---|---|
| P0500 | Vehicle Speed Error | SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE |
| P0579 | Cruise Control Multifunction Input A Circuit Range/Performance | PINPOINT TEST A |
| P0581 | Cruise Control Multifunction Circuit High | PINPOINT TEST A |
| P0703 | Brake On/Off Failure | TEST FD |
| P1572 | Brake On/Off Failure | Step 3, TEST FD |
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.