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 66 - Adjuster Assembly Control: Notes
Power and ground are supplied to adjuster assembly which controls engine torque during ASR operation.
During ASR operation, if EBCM delivers current greater than 16 amps to adjuster assembly for longer than 3 seconds without adjuster assembly reaching desired position, Code 66 will be set.
- Checks for Code 65 conditions, which can affect Code 66.
- Checks for mechanical binding of adjuster assembly, attached cables and related components. Binding would cause excessive load on adjuster assembly.
- Because Code 66 will only set during ASR operation, vehicle is raised to force ASR operation by allowing rear wheels to spin while front wheels remain still.
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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.