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Home >> Honda >> 2021 >> CR-V EX-L, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System - Testing & Troubleshooting (Except Hybrid) >> How to Information >> How to Troubleshoot the Climate Control System (Climate Control Panel with Display) >> Checking for DTCs

Checking for DTCs

The temperature indicator display indicates single or multiple DTCs. If no DTCs are present, the temperature indicator will flash "no".

DTC (Temperature Indicator Segments) DTC Detection Item
01 *1 B1225 An open in the in-car temperature sensor circuit
02 *1 B1226 A short in the in-car temperature sensor circuit

*1: Without auto idle stop system*2: 1.5 L engine*3: With auto idle stop system*4: With front seat heater

DTC (Temperature Indicator Segments) DTC Detection Item
05 B1227 An open in the outside air temperature sensor circuit
06 B1228 A short in the outside air temperature sensor circuit
09 B1231 An open in the evaporator temperature sensor circuit
0A B1232 A short in the evaporator temperature sensor circuit
17 B123F Automatic lighting control unit/sunlight sensor error
40 B1233 An open in the air mix control motor circuit
41 B1234 A short in the air mix control motor circuit
42 B1235 A problem in the air mix control motor circuit, linkage, door, or motor
49 B121A An open in the mode control motor circuit
4A B121B A short in the mode control motor circuit
4b B1240 A problem in the mode control motor circuit, linkage, door, or motor
55 B2986 An open in the recirculation control motor circuit
56 B1220 A short in the recirculation control motor circuit
57 B2983 A problem in the recirculation control motor circuit, linkage, door, or motor
59 B1241 A problem in the blower motor circuit
61 *2 B2988 A problem in the A/C compressor variable capacity control solenoid circuit
80 U1280 Communication bus line error (BUS-OFF)
83 U128D Climate control unit lost communication with gauge control module (VSP message)
89 *3 B121D Humidity/In-Car Temperature Sensor Communication Error
8A B120A Climate control unit LIN communication bus line error
8F *4 U1290 Climate control unit lost communication with seat heater control unit (front)
91 U1281 Climate control unit lost communication with MICU (body control module)
93 B2964 Climate control unit lost communication with front panel (climate control panel)
C0 --- Climate control unit internal error
Cd --- Unknown sunlight sensor type

*1: Without auto idle stop system*2: 1.5 L engine*3: With auto idle stop system*4: With front seat heater