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.
2012 Acura MDXFACTORY OEM SERVICE PROCEDURE
DTC Troubleshooting Index
| DTC | Detection Item | Brake System Indicator | ABS Indicator | VSA Indicator | VSA OFF Indicator | Trailer Stability Assist Warning | ||
|---|---|---|---|---|---|---|---|---|
| 11 | Right-Front Wheel Speed Sensor Circuit Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 12 | Right-Front Wheel Speed Sensor Signal Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 13 | Left-Front Wheel speed Sensor Circuit Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 14 | Left-Front Wheel Speed Sensor Signal Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 15 | Right-Rear Wheel Speed Sensor Circuit Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 16 | Right-Rear Wheel Speed Sensor Signal Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 17 | Left-Rear Wheel Speed Sensor Circuit Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 18 | Left-Rear Wheel Speed Sensor Signal Malfunction | ON or OFF(1) | ON | ON | OFF | ON | ||
| 21 | Right-Front Magnetic Encoder Malfunction | ON or OFF | ON | ON | OFF | ON | ||
| 22 | Left-Front Magnetic Encoder Malfunction | ON or OFF | ON | ON | OFF | ON | ||
| 23 | Right-Rear Magnetic Encoder Malfunction | ON or OFF | ON | ON | OFF | ON | ||
| 24 | Left-Rear Magnetic Encoder Malfunction | ON or OFF | ON | ON | OFF | ON | ||
| 25 | Yaw Rate Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 26 | Lateral Acceleration Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 27 | Steering Angle Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 28 | Longitudinal Acceleration Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 31 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 32 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 33 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 34 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 35 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 36 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 37 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 38 | ABS Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 51 | Motor Lock | ON | ON | ON | OFF | ON | ||
| 52 | Motor Stuck | ON | ON | ON | OFF | ON | ||
| 53 | Motor Stuck | ON | ON | ON | OFF | ON | ||
| 54 | Fail-Safe Relay Malfunction | ON or OFF | ON | ON | OFF | ON | ||
| 59 | BRK DIAG Signal High Voltage | OFF | OFF | OFF | ON | ON | ||
| 61 | Battery Voltage Low | ON or OFF | ON | ON | OFF | ON | ||
| 62 | Battery Voltage High | ON | ON | ON | OFF | ON | ||
| 65 | Brake Fluid Level Low | OFF | OFF | ON | OFF | ON | ||
| 66 | Pressure Sensor Malfunction | OFF | ON | ON | OFF | ON | ||
| 68 | Brake Pedal Position Switch Malfunction | OFF | OFF | ON | OFF | ON | ||
| 69 | BRK DIAG Signal Low Voltage | OFF | OFF | OFF | ON | ON | ||
| 81 | Modulator-Control Unit Internal Circuit Malfunction | ON or OFF | ON or OFF | ON or OFF | OFF | ON | ||
| 83 | PGM-FI Malfunction | OFF | OFF | ON | OFF | ON | ||
| 84 | VSA Sensor Neutral Position Not Written | OFF | OFF | ON or OFF | OFF | ON | ||
| 86 | F-CAN Communication Malfunction | ON or OFF | ON or OFF | ON or OFF | OFF | ON or OFF | ||
| 88 | Difference in Wheel Speed | ON or OFF | ON | ON | OFF | ON | ||
| 91 | VSA Activation Time Too Long | OFF | ON | ON | OFF | ON | ||
| 113 | Yaw Rate-Acceleration Sensor Power Source Malfunction | OFF | OFF | ON | OFF | ON | ||
| 121 | VSA Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 122 | VSA Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 123 | VSA Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 124 | VSA Solenoid Valve Malfunction | ON | ON | ON | OFF | ON | ||
| 131 | Yaw Rate Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 132 | Lateral Acceleration Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 133 | Lateral Acceleration Sensor Malfunction (Installation Error) | OFF | OFF | ON | OFF | ON | ||
| 134 | Steering Angle Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 135 | Longitudinal Acceleration Sensor Malfunction | OFF | OFF | ON | OFF | ON | ||
| 136 | Longitudinal Acceleration Sensor Malfunction (Installation Error) | OFF | OFF | ON | OFF | ON | ||
| 137 | Pressure Sensor Offset Malfunction | OFF | ON | ON | OFF | ON | ||
| 138 | Brake Pedal Position Switch Malfunction | OFF | ON | ON | OFF | ON | ||
| 158 | ECU Software Update Failure | ON or OFF | ON or OFF | ON or OFF | ON or OFF | ON or OFF | ||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.