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DTC Troubleshooting Index

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Record all DTCs, and sort them by DTC type using the DTC troubleshooting index, then troubleshoot the DTC(s) in this order:
  • Battery voltage DTCs
  • Internal error DTCs
  • Loss of communication DTCs
  • Signal error DTCs

MICU 

DTC TROUBLESHOOTING CHART - MICU

DTC Description DTC Type
B1002  MICU internal (EEPROM) error Internal error
B1036  IG1 power supply circuit malfunction Signal error
B1275 Headlight switch OFF position circuit malfunction Signal error
B1276 Headlight switch PARKING position circuit malfunction Signal error
B1277 Headlight switch AUTO position circuit malfunction Signal error
B1278 Headlight switch ON position circuit malfunction Signal error
B1279 Dimmer switch circuit malfunction Signal error
B1280 Turn signal switch circuit malfunction Signal error
B1281 Front wiper MIST position circuit malfunction Signal error
B1282 Front wiper INT (AUTO) position circuit malfunction Signal error
B1283 Front wiper LOW position circuit malfunction Signal error
B1284 Front wiper HIGH position circuit malfunction Signal error
B1575 Auto light sensor circuit malfunction Signal error
U0199  MICU lost communication with door multiplex control unit Loss of communication
U1280  Communication bus line error (BUS-OFF) Loss of communication
U128D  MICU lost communication with gauge control module Loss of communication
U1291  MICU lost communication with relay control module (RM frame) Loss of communication

Rear MICU 

DTC TROUBLESHOOTING CHART - REAR MICU

DTC Description DTC Type
B1028 Rear window auto stop switch malfunction Signal error
B1952 EEPROM abnormal Internal error
U1280  Rear MICU communication bus line error (BUS-OFF) Loss of communication
U1281 Rear MICU lost communication with MICU (MICU frame) Loss of communication
U128D Rear MICU lost communication with gauge control module (AT frame) Loss of communication
U1291 Rear MICU lost communication with relay control module (RM frame) Loss of communication

Relay Control Module 

DTC TROUBLESHOOTING CHART - RELAY CONTROL MODULE

DTC Description DTC Type
B1052 Relay control module internal (EEPROM) error Internal error
B1075 Headlight switch back-up circuit malfunction Signal error
B1076 Windshield wiper switch back-up circuit malfunction Signal error
B1077 Wiper switch (As) malfunction Signal error
B1079 Daytime running light malfunction Signal error
B1080  Power supply circuit (IG1 line) input error for relay control module and MICU Signal error
U1280  Relay control module communication bus line error (BUS-OFF) Loss of communication
U1281 Relay control module lost communication with MICU (MICU frame) Loss of communication
U128D Relay control module lost communication with gauge control module (VSP/NE frame) Loss of communication

Door Multiplex Control Unit 

DTC TROUBLESHOOTING CHART - DOOR MULTIPLEX CONTROL UNIT

DTC Description DTC Type
B1125 Driver's power window motor A pulse malfunction Signal error
B1126 Driver's power window motor B pulse malfunction Signal error
B1127 Driver's door Lock key cylinder switch malfunction Signal error
B1128 Driver's door lock switch malfunction Signal error
B1129 Driver's door lock knob switch malfunction Signal error
B1130 Front Passenger's power window motor A-phase pulse signal input error Signal error
B1131 Front Passenger's power window motor B-phase pulse signal input error Signal error
B1140 Driver's power window position detect circuit malfunction Signal error
B1142 Power window master switch lost communication with the other units (UART communication error) Signal error
B1145 Front passenger's window position detect circuit malfunction Signal error
U0155 Door multiplex control unit lost communication with gauge control module Loss of communication
U0164 Door multiplex control unit lost communication with climate control unit Loss of communication
U1280  Door multiplex control unit communication bus line error (BUS-OFF) Loss of communication
U1282 Door multiplex control unit lost communication with MICU Loss of communication
U1283 Door multiplex control unit lost communication with MICU (DRLK frame) Loss of communication

Gauge Control Module 

DTC TROUBLESHOOTING CHART - GAUGE CONTROL MODULE

DTC Description DTC Type
B1152 Gauge control module internal (EEPROM) error Internal error
B1158 Gauge control nodule lost communication with relay control module (RM frame) Loss of communication
B1163 Gauge control module lost communication with left power sliding door control unit (PSDL frame) Loss of communication
B1164 Gauge control module lost communication with right power sliding door control unit (PSDR frame) Loss of communication
B1175 Fuel level sensor (Fuel gauge sending unit) circuit malfunction Signal error
B1176 Fuel level sensor (Fuel gauge sending unit) circuit short Signal error
B1192 Gauge control module lost communication with the battery sensor (UART line) Loss of communication
U0029 F-CAN communication line error Loss of communication
U0100 Gauge control module lost communication with PCM Loss of communication
U0122 Gauge control module lost communication with VSA modulator-control unit (VSA message) Loss of communication
U0127 Gauge control module lost communication with TPMS control unit (TPMS message) Loss of communication
U0151 Gauge control module lost communication with SRS unit (SRS message) Loss of communication
U0230 Gauge control module lost communication with power tailgate control unit Loss of communication
U1280  Gauge control module communication bus line error (BUS-OFF) Loss of communication
U1281 Gauge control module lost communication with MICU (MICU frame) Loss of communication
U1288 Gauge control module lost communication with PARKSR Loss of communication
U128F Gauge control module lost communication with BSI control unit (BSI message) Loss of communication
U1296 Gauge control module lost communication with HVAC display unit Loss of communication

Headlight Leveling Control Unit 

DTC TROUBLESHOOTING CHART - HEADLIGHT LEVELING CONTROL UNIT

DTC Description DTC Type
B2456 Headlight leveling control unit lost communication with MICU (Headlight message) Loss of communication
B2476 Front suspension stroke sensor circuit malfunction Signal error
B2477 Rear suspension stroke sensor circuit malfunction Signal error
B2479 Headlight leveling control unit (EEPROM) error Internal error
B2480 Output shaft (countershaft) speed sensor malfunction Signal error
B2481 Vehicle speed signal error Signal error
B2482 Combination light switch signal error Signal Error
U0155 Headlight leveling control unit lost communication with gauge control module Loss of communication
U1280  Headlight leveling control unit communication bus line error (BUS-OFF) Loss of communication
U1282 Headlight leveling control unit lost communication with MICU Loss of communication

Climate Control Unit 

DTC TROUBLESHOOTING CHART - CLIMATE CONTROL UNIT

DTC Description DTC Type
U1280  Communication bus line error (BUS-OFF) Loss of communication
U0155 Climate control unit lost communication with gauge control module Loss of communication
U1281 Climate control unit lost communication with MICU (WIPSW message) Loss of communication
U128D Climate control unit lost communication with gauge control module Loss of communication
U1290 Climate control unit lost communication with seat heater control unit Loss of communication
B1215 An open or short in the recirculation control motor circuit Signal error
B121D Hum-temp sensor communication error (An open or short in the humidity sensor circuit) Loss of communication
B1225 An open in the in-car temperature sensor circuit Signal error
B1226 A short in the in-car temperature sensor circuit Signal error
B1227 An open in the outside air temperature sensor circuit Signal error
B1228 A short in the outside air temperature sensor circuit Signal error
B1229 An open in the sunlight sensor circuit Signal error
B1230 A short in the sunlight sensor circuit Signal error
B1231 An open in the evaporator temperature sensor circuit (front) Signal error
B1232 A short in the evaporator temperature sensor circuit (front) Signal error
B1233 An open in the air mix control motor circuit (driver's) Signal error
B1234 A short in the air mix control motor circuit (driver's) Signal error
B1235 A problem in the air mix control motor circuit, linkage, door, or motor (driver's) Signal error
B1236 An open in the passenger's air mix control motor circuit Signal error
B1237 A short in the passenger's air mix control motor circuit Signal error
B1238 A problem in the passenger's air mix control motor circuit, linkage, door, or motor Signal error
B1239 An open or short in the mode control motor circuit (front) Signal error
B1240 A problem in the mode control motor circuit, linkage, door, or motor (front) Signal error
B1241 A problem in the blower motor circuit (front) Signal error
B2965 Rear communication failure Loss of communication
B2967 An open in the humidity sensor circuit Signal error
B2968 A short in the humidity sensor circuit Signal error
B2969 Climate control unit lost communication with MICU (WIPSW message) Loss of communication
B2979 An open in the A/C pressure sensor circuit Signal error
B2980 A short in the A/C pressure sensor circuit Signal error
B2983 A problem in the recirculation control motor circuit, linkage, door, or motor Signal error

HVAC Control Unit 

DTC TROUBLESHOOTING CHART - HVAC CONTROL UNIT

DTC Description DTC Type
U1280  Communication bus line error (BUS-OFF) Loss of communication
U0155 HVAC control unit lost communication with gauge control module Loss of communication
U128D HVAC control unit lost communication with gauge control module Loss of communication
B1215 An open or short in the recirculation control motor circuit Signal error
B1231 An open in the evaporator temperature sensor circuit Signal error
B1232 A short in the evaporator temperature sensor circuit Signal error
B1233 An open in the air mix control motor circuit (front) Signal error
B1234 A short in the air mix control motor circuit (front) Signal error
B1235 A problem in the air mix control motor circuit, linkage, door, or motor (front) Signal error
B1239 An open or short in the mode control motor circuit (front) Signal error
B1240 A problem in the mode control motor circuit, linkage, door, or motor (front) Signal error
B1241 A problem in the blower motor circuit (front) Signal error
B2965 Rear communication failure Loss of communication
B2979 An open in the A/C pressure sensor circuit Signal error
B2980 A short in the A/C pressure sensor circuit Signal error
B2983 A problem in the recirculation control motor circuit, linkage, door, or motor Signal error

Rear Climate Control Unit 

DTC TROUBLESHOOTING CHART - REAR CLIMATE CONTROL UNIT

DTC Description DTC Type
B1221 An open in the rear mode control motor circuit Signal error
B1222 A short in the rear mode control motor circuit Signal error
B1223 A problem in the rear blower motor circuit Signal error
B1244 An open in the rear air mix control motor circuit Signal error
B1245 A short in the rear air mix control motor circuit Signal error
B1246 A problem in the rear air mix control motor circuit, linkage, door, or motor Signal error
B1248 A problem in the rear mode control motor circuit, linkage, doors, or motor Signal error

Rear HVAC Control Unit 

DTC TROUBLESHOOTING CHART - REAR HVAC CONTROL UNIT

DTC Description DTC Type
B1213 An open in the rear evaporator temperature sensor circuit Signal error
B1214 A short in the rear evaporator temperature sensor circuit Signal error
B1221 An open in the rear mode control motor circuit Signal error
B1222 A short in the rear mode control motor circuit Signal error
B1223 A problem in the rear blower motor circuit Signal error
B1244 An open in the rear air mix control motor circuit Signal error
B1245 A short in the rear air mix control motor circuit Signal error
B1246 A problem in the rear air mix control motor circuit, linkage, door, or motor Signal error
B1248 A problem in the rear mode control motor circuit, linkage, doors, or motor Signal error

Seat Heater Control Unit 

DTC TROUBLESHOOTING CHART - SEAT HEATER CONTROL UNIT

DTC Description DTC Type
B1C55 Driver's heater thermistor circuit open Signal error
B1C56 Driver's heater thermistor circuit short Signal error
B1C57 Passenger's heater thermistor circuit open Signal error
B1C58 Passenger's heater thermistor circuit short Signal error
B1C60 Driver's heater current abnormal high Signal error
B1C61 Driver's heater current abnormal low Signal error
B1C62 Passenger's heater current abnormal high Signal error
B1C63 Passenger's heater current abnormal low Signal error
B1C68 Driver's heater not heating Signal error
B1C69 Passenger's heater not heating Signal error
B1C70 Driver's main heater switch failure Signal error
B1C71 Passenger's main heater switch failure Signal error
U1064 Seat heater control unit lost communication with climate control unit Loss of communication
U1280  Seat heater control unit communication bus line error (BUS-OFF) Loss of communication

Power Seat Control Unit 

DTC TROUBLESHOOTING CHART - POWER SEAT CONTROL UNIT

DTC Description DTC Type
B1802 Power seat control unit failure Internal error
B1825 Slide pulse error (no change in pulse for 1 second) Signal error
B1826 Front height pulse error (no change in pulse for 1 second) Signal error
B1827 Rear height pulse error (no change in pulse for 1 second) Signal error
B1828 Driver's seat recline motor pulse error Signal error
B1829 AT-P signal and VSP signal have an illegal combination Signal error
B1836 Power seat position sensor circuit short Signal error
B1837 Memory position calling timeout Signal error
B1843 UART communication error Loss of communication
B1844 Power seat slide switch circuit malfunction Signal error
B1845 Power seat recline switch circuit malfunction Signal error
B1846 Power seat front up-down switch circuit malfunction Signal error
B1847 Power seat rear up-down switch circuit malfunction Signal error
U1280  Power seat control unit communication bus line error (BUS-OFF) Loss of communication
U1281 Power seat control unit lost communication with MICU (MICU frame) Loss of communication
U128D Power seat control unit lost communication with gauge control module (VSP/NE frame) Loss of communication

Immobilizer-Keyless Control Unit 

DTC TROUBLESHOOTING CHART - IMMOBILIZER-KEYLESS CONTROL UNIT

DTC Description DTC Type
U0199 Immobilizer-keyless control unit lost communication with door multiplex control unit Loss of communication
U1280  Immobilizer-keyless control unit communication bus line error (BUS-OFF) Loss of communication
U1281 Immobilizer-keyless control unit lost communication with MICU Loss of communication
U128D Immobilizer-keyless control unit lost communication with gauge control module Loss of communication

Left Power Sliding Door Control Unit 

DTC TROUBLESHOOTING CHART - LEFT POWER SLIDING DOOR CONTROL UNIT

DTC Description DTC Type
B2002 Left power sliding door control unit internal error (EEPROM error) Internal error
B2025 Left power sliding door switch (open side) signal error Signal error
B2026 Left power sliding door switch (close side) signal error Signal error
B2027 Left power sliding door remote control switch 1 signal error Signal error
B2028 Left power sliding door remote control switch 2 signal error Signal error
B2029 Left power sliding door remote control switch 3 signal error Signal error
B2030 Left power sliding door touch/pinch sensor signal error Signal error
B2031 Left power slide motor pulse (SLSE1) signal error Signal error
B2032 Left power slide motor pulse (SLSE2) signal error Signal error
B2033 Left power slide motor circuit malfunction Signal error
B2034 Left power slide motor electromagnetic clutch circuit malfunction Signal error
B2035 Left power sliding door half latch switch circuit short Signal error
B2036 Left power sliding door full latch switch circuit short Signal error
B2037 Left power sliding door ratchet switch circuit open Signal error
B2038 Left power sliding door base position switch circuit open/short Signal error
B2039 Left power sliding door switch open/close signal input error (input at the same time) Signal error
B2040 Left power slide motor malfunction Signal error
B2041 Left power slide motor pulse (SLSE1/SLSE2) error Signal error
B2044 Left B-pillar open switch signal input error Signal error
B2045 Left B-pillar close switch signal input error Signal error
B2046 Left B-pillar switch signal simultaneous ON error Signal error
B2047 Left child lock switch signal input error Signal error
U1280  Left power sliding door control unit communication bus line error (BUS-OFF) Loss of communication
U1281 Left power sliding door control unit lost communication with MICU Loss of communication
U128D Left power sliding door control unit lost communication with gauge control module Loss of communication
U1292 Left power sliding door control unit lost communication with rear MICU Loss of communication

Right Power Sliding Door Control Unit 

DTC TROUBLESHOOTING CHART - RIGHT POWER DOOR CONTROL UNIT

DTC Description DTC Type
B2052 Right power sliding door control unit internal error (EEPROM error) Internal error
B2075 Right power sliding door switch (open side) signal error Signal error
B2076 Right power sliding door switch (close side) signal error Signal error
B2077 Right power sliding door remote control switch 1 signal error Signal error
B2078 Right power sliding door remote control switch 2 signal error Signal error
B2079 Right power sliding door remote control switch 3 signal error Signal error
B2080 Right power sliding door touch/pinch sensor signal error Signal error
B2081 Right power slide motor pulse (SLSE1) signal error Signal error
B2082 Right power slide motor pulse (SLSE2) signal error Signal error
B2083 Right power slide motor circuit malfunction Signal error
B2084 Right power slide motor electromagnetic clutch circuit malfunction Signal error
B2085 Right power sliding door half latch switch circuit short Signal error
B2086 Right power sliding door full latch switch circuit short Signal error
B2087 Right power sliding door ratchet switch circuit open Signal error
B2088 Right power sliding door base position switch circuit open/short Signal error
B2089 Right power sliding door switch open/close signal input error (input at the same time) Signal error
B2090 Right power slide motor malfunction Signal error
B2091 Right power slide motor pulse (SLSE1/SLSE2) error Signal error
B2094 Right B-pillar open switch signal input error Signal error
B2095 Right B-pillar close switch signal input error Signal error
B2096 Right B-pillar switch signal simultaneous ON error Signal error
B2097 Right child lock switch signal input error Signal error
U1280  Right power sliding door control unit communication bus line error (BUS-OFF) Loss of communication
U1281 Right power sliding door control unit lost communication with MICU Loss of communication
U128D Right power sliding door control unit lost communication with gauge control module Loss of communication
U1293 Right power sliding door control unit lost communication with left power sliding door control unit (PSDBUZZ/PSDL frame) Loss of communication

Power Tailgate Control Unit 

DTC TROUBLESHOOTING CHART - POWER TAIL GATE CONTROL UNIT

DTC Description DTC Type
B1352 Power tailgate control unit internal error (EEPROM error) Internal error
B1375 Driver's side PTG switch circuit malfunction Signal error
B1376 Tailgate outer handle switch circuit malfunction Signal error
B1377 Power tailgate inside switch circuit malfunction Signal error
B1378 Power tailgate right touch/pinch sensor circuit malfunction Signal error
B1379 Power tailgate left touch/pinch sensor circuit malfunction Signal error
B1380 Tailgate closer unit neutral switch circuit malfunction Signal error
B1381 Tailgate closer unit release switch circuit malfunction Signal error
B1382 Tailgate closer unit full latch switch circuit malfunction Signal error
B1383 Tailgate closer unit ratchet switch circuit malfunction Signal error
B1384 Tailgate closer unit half latch switch circuit malfunction Signal error
B1386 Power tailgate sensor pulse A circuit malfunction Signal error
B1387 Power tailgate sensor pulse B circuit malfunction Signal error
B1388 Power tailgate drive motor circuit malfunction Signal error
B1389 Power tailgate motor clutch circuit malfunction Signal error
B1390 Power tailgate closer motor function error Signal error
U0155 Power tailgate control unit lost communication with gauge control module (VSP/NE, AT frame) Loss of communication
U0199 Power tailgate control unit lost communication with P/W (DRLOCK SW, KLDRLOCK frame) Loss of communication
U1280  Power tailgate control unit communication bus line error (BUS-OFF) Loss of communication
U1282 Power tailgate control unit lost communication with MICU (MICU frame) Loss of communication
U1283 Power tailgate control unit lost communication with rear MICU (RALOCK SW frame) Loss of communication

Parking and Back-Up Sensor Control Unit 

DTC TROUBLESHOOTING CHART - POWER AND BACK-UP SENSOR CONTROL UNIT

DTC Description DTC Type
B2601 Parking sensor CPU error Internal error
B2602 Parking sensor EEPROM error Internal error
B2625 Left front sensor failure Signal error
B2628 Right front sensor failure Signal error
B2629 Left rear sensor failure Signal error
B2630 Center left rear sensor failure Signal error
B2631 Center right rear sensor failure Signal error
B2632 Right rear sensor failure Signal error
B2633 Front bus failure Signal error
B2634 Rear bus failure Signal error
B2635 IND erroneous lighting Signal error
B2636 Vehicle status combination error Signal error
U0155 Parking and back-up sensor control unit lost communication with gauge control module Loss of communication
U1280  Parking and back-up sensor control unit communication bus line error (BUS-OFF) Loss of communication
U1282 Parking and back-up sensor control unit lost communication with MICU Loss of communication

BSI Control Unit 

DTC TROUBLESHOOTING CHART - BSI CONTROL UNIT

DTC Detection DTC Type
B18A1 BSI control unit internal circuit error Internal error
B18A5 Left BSI radar unit temperature high Signal error
B18A6 Right BSI radar unit temperature high Signal error
B18A7 Left BSI radar unit voltage input low Signal error
B18A8 Right BSI radar unit voltage input low Signal error
B18A9 Left BSI radar unit voltage input high Signal error
B18AA Right BSI radar unit voltage input high Signal error
B18AF Left BSI radar unit internal circuit error Internal error
B18B1 Right BSI radar unit internal circuit error Internal error
B18B4 Left BSI radar unit dirty Signal error
B18B5 Right BSI radar unit dirty Signal error
B18B6 Lost communication with left BSI radar unit Loss of communication
B18B7 Lost communication with right BSI radar unit Loss of communication
B18B8 Left BSI radar unit azimuth off alignment Signal error
B18B9 Right BSI radar unit azimuth off alignment Signal error
B18BA Left BSI radar unit version incorrect Signal error
B18BB Right BSI radar unit version incorrect Signal error
B18BC BSI radar units communication error Signal error
B18BD BSI control unit voltage input high Signal error
B18BE BSI control unit voltage input low Signal error
B18C2 Left BSI alert indicator output error Signal error
B18CF Right BSI alert indicator output error Signal error
U0155 Lost communication with the gauge control module Loss of communication
U0423 Invalid data received from PCM (vehicle speed data) Loss of communication
U1280  Communication bus line error (BUS-OFF) Loss of communication