Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code 16, Enable Relay Coil Circuit Open: Notes
ABS module receives battery voltage when system enable relay contacts are closed. Voltage at switched battery terminal provides power for ABS motors and solenoids. If ABS module detects fault in this circuit, ABS operation will be disabled, and ABS and BRAKE warning lights will illuminate.
Code 16 will set if enable relay coil circuit is open. This code can set during initialization. If conditions necessary to set Code 16 occur during ABS braking, Code 14 will be set. Code 16 will not set if a previous failure has already disabled ABS. Code 86 will also set and illuminate BRAKE warning light if rear ABS motor is not in home position.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.