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 ZX2 AutomaticFACTORY OEM SERVICE PROCEDURE
Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| P0500 | Vehicle Speed Error | PCM | REFER to ANTI-LOCK CONTROL . |
| P0579 | Cruise Control Multifunction Input A Circuit Range/Performance | PCM | Go To PINPOINT TEST A . |
| P0581 | Cruise Control Multifunction Circuit High | PCM | Go To PINPOINT TEST A . |
| P0703 | Brake On/Off Failure | PCM | REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . |
| P1572 | Brake On/Off Failure | PCM | REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.