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 Ford Windstar BaseFACTORY OEM SERVICE PROCEDURE
Communication DTCS (U Codes)
DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| U1027 | Missing or Invalid Throttle Message | NGSC Module | CARRY OUT the PCM self-test. REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE . |
| U1041 | Missing or Invalid Speed Message | NGSC Module | CARRY OUT the ABS self-test. REFER to ANTI-LOCK CONTROL-TRACTION CONTROL or ANTI-LOCK CONTROL-TRACTION CONTROL & STABILIT . |
| U1051 | Missing or Invalid Brake Message | NGSC Module | CARRY OUT the REM self-test. |
| U1059 | Missing or Invalid PRNDL Message | NGSC Module | CARRY OUT the PCM self-test. REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE . |
| U2013 | Compass Module is Not Responding | MC Module | REFER to INFORMATION AND MESSAGE CENTER . |
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.