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.
DTC 66: VSA Pressure Sensor (Inside of VSA Modulator-Control Unit)
2003 Acura MDX TouringSECTION DTC 66: VSA Pressure Sensor (Inside of VSA Modulator-Control Unit)
- Clear the DTC (see HOW TO CLEAR DTCS ).
- Remove the HDS from the 16P DLC.
- Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 66 indicated?
- YES - Go to step 4.
- NO - The system is OK at this time. Refer to GENERAL TROUBLESHOOTING INFORMATION .
- Do the VSA sensors neutral position memorization (see VSA SENSOR NEUTRAL POSITION MEMORIZATION ).
- Clear the DTC (see HOW TO CLEAR DTCS ).
- Disconnect the HDS from the 16P DLC.
- Test-drive the vehicle.
Does the ABS indicator come on, and is DTC 66 indicated?
- YES - Check for loose terminals in the VSA modulator-control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ) and recheck.
- NO - The system is OK at this time. Refer to INTERMITTENT FAILURES .
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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.