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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHONDA2020CIVIC SI, 4D SEDANREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXSEAT HEATER CONTROL UNIT DTCS
2020 Honda Civic Si, 4D Sedan
Seat Heater Control Unit DTCS
2020 Honda Civic Si, 4D SedanSECTION Seat Heater Control Unit DTCS
| DTC | Description | DTC type |
|---|---|---|
| B1C55 | Driver's heater thermistor circuit open | Signal error |
| B1C56 | Driver's heater thermistor circuit short | Signal error |
| B1C57 | Front passenger's heater thermistor circuit open | Signal error |
| B1C58 | Front 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 | Front passenger's heater current abnormal high | Signal error |
| B1C63 | Front passenger's heater current abnormal low | Signal error |
| B1C68 | Driver's heater not heating | Signal error |
| B1C69 | Front passenger's heater not heating | Signal error |
| B1C70 | Driver's main heater switch failure | Signal error |
| B1C71 | Front passenger's main heater switch failure | Signal error |
| U1064 | Seat heater control unit lost communication with climate control unit | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.