Active air dam actuator control voltage below expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Medium severity. Can I keep driving?Drive with caution and go to a repair shop. If it affects the brakes or steering, do not continue if you notice abnormal behavior.
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Most likely causes
- Wiring shorted to ground
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
What each character of C0602 means
- C: Chassis
- 0: Generic code: same on every make
- 6: Subsystem depends on the code range
- 02: Specific fault in that system
Frequently asked questions
Can I keep driving with code C0602?
Drive with caution and go to a repair shop. If it affects the brakes or steering, do not continue if you notice abnormal behavior.
What causes code C0602?
The most common causes are: wiring shorted to ground; connector pins corroded - high contact resistance; harness chafing through insulation.
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.