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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HOMESERVICE MANUALSACURA2015RDX AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXHVAC SYSTEM DTCS
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.