C0603
Active Air Dam Control Circuit High
C0603 is an OBD-II diagnostic trouble code meaning: Active Air Dam Control Circuit High. Common causes: short circuit to positive in the control circuit, active air deflector solenoid malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Decreased fuel efficiency
- Unstable operation of the active air deflector
Causes
- Short circuit to positive in the control circuit
- Active air deflector solenoid malfunction
- Wiring harness damage
- Control unit malfunction
How to Fix
- Check the integrity of the wiring harness
- Check solenoid resistance
- Check control circuit voltage
- Replace faulty components
Related codes
Error C0603 by Vehicle Brand
FAQ
What does the C0603 code mean?
C0603 is an OBD-II diagnostic trouble code that indicates: Active Air Dam Control Circuit High
What causes a C0603 error code?
The most common causes of C0603 include: Short circuit to positive in the control circuit; Active air deflector solenoid malfunction; Wiring harness damage; Control unit malfunction.
How do I fix a C0603 diagnostic trouble code?
To fix C0603: Check the integrity of the wiring harness. Check solenoid resistance. Check control circuit voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0603?
Limited driving only, diagnose soon
How much does it cost to fix C0603?
The estimated repair cost for C0603 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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