Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
1Original wording in English
FORD, LINCOLN
FORD: VEHICLES MAY RECEIVED INVALID DATA FROM ACCESSORY PROTOCOL INTERFACE MODULE (DTC U0554:00) FROM GENERIC FUNCTION MODULE DURING DIAGNOSTIC SELF TESTS. MODEL 2012-2013 FOCUS ELECTRIC, C-MAX/FUSION/MKZ HYBRID, ENERGI. *PE
Check vehicle applicability
5A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | FOCUS ELECTRIC ↗ | 2013 |
| Ford | FOCUS ELECTRIC ↗ | 2012 |
| Ford | FUSION HYBRID ↗ | 2013 |
| Ford | FUSION HYBRID ↗ | 2012 |
| Lincoln | MKZ HYBRID ↗ | 2012 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.