C0603: The active air deflector control gives a higher signal than normal
The active air deflector control gives a higher signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | C0603 |
|---|---|
| System | Chassis |
| Group | C06xx, Chassis |
| Type | Generic: it means the same on every make |
How to read and clear C0603 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see C0603 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- C0600 There is a fault in the four-wheel drive range actuator position control
- C0601 The active air deflector control has a broken or disconnected wire
- C0602 The active air deflector control gives a lower signal than normal
- C0604 The active air deflector control gives readings outside the normal range
- C0605 The steering wheel angle sensor has a broken or disconnected wire
- C0606 The steering wheel angle sensor gives a lower signal than normal
- C0607 The steering wheel angle sensor gives a higher signal than normal
What does code C0603 mean?
The active air deflector control gives a higher signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear C0603?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, C0603 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
