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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2015 Acura RDX AWD
HVAC System DTCS
2015 Acura RDX AWDSECTION HVAC System DTCS
HVAC SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) INDENTIFICATION
| DTC | Description |
|---|---|
| B1209 | Climate Control Unit Lost Communication with MICU (FOB ID message) (2013-18) |
| B121A | An Open in the Mode Control Motor Circuit (2013-15) |
| B121A | An Open in the Mode Control Motor Circuit (2016-18) |
| B121B | A Short in the Mode Control Motor Circuit (2013-15) |
| B121B | A Short in the Mode Control Motor Circuit (2016-18) |
| B1220 | A Short in the Recirculation Control Motor Circuit (2013-15) |
| B1220 | A Short in the Recirculation Control Motor Circuit (2016-18) |
| B1225 | An Open in the In-Car Temperature Sensor Circuit (2013-15) |
| B1225 | An Open in the In-Car Temperature Sensor Circuit (2016-18) |
| B1226 | A Short in the In-Car Temperature Sensor Circuit (2013-15) |
| B1226 | A Short in the In-Car Temperature Sensor Circuit (2016-18) |
| B1227 | An Open in the Outside Air Temperature Sensor Circuit (2013-15) |
| B1227 | An Open in the Outside Air Temperature Sensor Circuit (2016-18) |
| B1228 | A Short in the Outside Air Temperature Sensor Circuit (2013-15) |
| B1228 | A Short in the Outside Air Temperature Sensor Circuit (2016-18) |
| B1229 | An Open in the Sunlight Sensor Circuit (2013-15) |
| B1229 | An Open in the Sunlight Sensor Circuit (2016-18) |
| B1230 | A Short in the Sunlight Sensor Circuit (2013-15) |
| B1230 | A Short in the Sunlight Sensor Circuit (2016-18) |
| B1231 | An Open in the Evaporator Temperature Sensor Circuit (2013-15) |
| B1231 | An Open in the Evaporator Temperature Sensor Circuit (2016-18) |
| B1232 | A Short in the Evaporator Temperature Sensor Circuit (2013-15) |
| B1232 | A Short in the Evaporator Temperature Sensor Circuit (2016-18) |
| B1233 | An Open in the Air Mix Control Motor Circuit (Driver's) (2013-15) |
| B1233 | An Open in the Air Mix Control Motor Circuit (Driver's) (2016-18) |
| B1234 | A Short in the Air Mix Control Motor Circuit (Driver's) (2013-15) |
| B1234 | A Short in the Air Mix Control Motor Circuit (Driver's) (2016-18) |
| B1235 | A Problem in the Air Mix Control Motor Circuit, Linkage, Door, or Motor (Driver's) (2013-15) |
| B1235 | A Problem in the Air Mix Control Motor Circuit, Linkage, Door, or Motor (Driver's) (2016-18) |
| B1236 | An Open in the Passenger's Air Mix Control Motor Circuit (2013-15) |
| B1236 | An Open in the Passenger's Air Mix Control Motor Circuit (2016-18) |
| B1237 | A Short in the Passenger's Air Mix Control Motor Circuit (2013-15) |
| B1237 | A Short in the Passenger's Air Mix Control Motor Circuit (2016-18) |
| B1238 | A Problem in the Passenger's Air Mix Control Motor Circuit, Linkage, Door, or Motor (2013-15) |
| B1238 | A Problem in the Passenger's Air Mix Control Motor Circuit, Linkage, Door, or Motor (2016-18) |
| B1240 | A Problem in the Mode Control Motor Circuit, Linkage, Door, or Motor (2013-15) |
| B1240 | A Problem in the Mode Control Motor Circuit, Linkage, Door, or Motor (2016-18) |
| B1241 | A Problem in the Blower Motor Circuit (2013-15) |
| B1241 | A Problem in the Blower Motor Circuit (2016-18) |
| B2983 | A Problem in the Recirculation Control Motor Circuit, Linkage, Door, or Motor (2013-15) |
| B2983 | A Problem in the Recirculation Control Motor Circuit, Linkage, Door, or Motor (2016-18) |
| B2986 | An Open in the Recirculation Control Motor Circuit (2013-15) |
| B2986 | An Open in the Recirculation Control Motor Circuit (2016-18) |
| U1280 | Communication Bus Line Error (BUS-OFF) (Climate Control Unit) (2013-15) |
| U1280 | Communication Bus Line Error (BUS-OFF) (Climate Control Unit) (2016-18) |
| U1281 | Lost Communication with MICU (Climate Control Unit) (2016-18) |
| U128D | Lost Communication with Gauge Control Module (Climate Control Unit) (2013-15) |
| U128D | Lost Communication with Gauge Control Module (Climate Control Unit) (2016-18) |
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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.