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
6Original wording in English
RAM
Active Air Dam Diagnostic Trouble Codes (DTC) U0645, C0604.
FORD
This article supersedes TSB 25-2155 to add labor time for F-150 Lightning. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * "Active Air Dam System Fault See Manual" warning message in the instrument panel cluster (IPC) * Diagnostic trouble code (DTC) C0604:00 stored…
FORD
This article supersedes TSB 24-2404 and TSB 23-2126 to change the labor operation from actual time to fixed time. Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * "Active Air Dam System Fault See Manual" warning message in the instrument panel cluster (IPC) * Diagno…
FORD
Some 2021-2023 F-150 vehicles may experience an "Active Air Dam System Fault See Manual" warning message in the IPC and/or DTC C0604:00 stored in the PCM
Check vehicle applicability
7A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | F-150 ↗ | 2023 |
| Ford | F-150 ↗ | 2022 |
| Ford | F-150 ↗ | 2021 |
| Ford | F-150 LIGHTNING BEV ↗ | 2023 |
| Ford | F-150 LIGHTNING BEV ↗ | 2022 |
| Ram | 1500 ↗ | 2025 |
| Ram | 1500 ↗ | 2024 |
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.