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.
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2018 Acura RDX AWD
AWD System DTCS
2018 Acura RDX AWDSECTION AWD System DTCS
AWD SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description |
|---|---|
| C1840-12 | Differential Fluid Pressure Sensor Circuit High Voltage (2013-18) |
| C1840-14 | Differential Fluid Pressure Sensor Circuit Low Voltage (2013-18) |
| C1841-11 | Differential Fluid Temperature Sensor Circuit Low Voltage (2013-18) |
| C1841-13 | Differential Fluid Temperature Sensor Circuit High Voltage (2013-18) |
| C1841-27 | Differential Fluid Temperature Sensor Circuit Range/Performance Problem (2013-18) |
| C1850-12 | Fail Safe Relay Stuck ON (2013-15) |
| C1850-12 | Fail Safe Relay Stuck ON (2016-18) |
| C1850-14 | Fail Safe Relay Stuck OFF (2013-15) |
| C1850-14 | Fail Safe Relay Stuck OFF (2016-18) |
| C1851-18 | Motor Circuit Low Current (2013-18) |
| C1851-19 | Control Module Internal Control Module Malfunction (2013-18) |
| C1851-1E | Motor Circuit High Current (2013-18) |
| C1852-18 | Solenoid Valve Circuit Low Current (2013-18) |
| C1852-19 | Solenoid Valve Circuit High Current (2013-18) |
| C1858-72 | Differential Fluid Pressure Deviation Low (2013-18) |
| C1858-73 | Differential Fluid Pressure Deviation High (2013-18) |
| C1860-98 | Differential Fluid Overheated (2013-18) |
| C1861-9A | Vehicle Spin Detected (2013-18) |
| C1870-00 | Related Malfunctions (2013-18) |
| C1873-00 | Steering Angle Sensor Malfunction (2013-18) |
| U0100-00 | F-CAN Malfunction (2013-15) |
| U0100-00 | F-CAN Malfunction (2016-18) |
| U3000-49 | Control Module Internal Control Module Malfunction (2013-18) |
| U3000-51 | Control Module Programming Error (2013-18) |
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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.