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 MANUALSHONDA2018RIDGELINE BLACK EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXKEYLESS ACCESS CONTROL UNIT DTCS2021 2022 2023
2018 Honda Ridgeline Black Edition
2021 2022 2023
2018 Honda Ridgeline Black EditionSECTION 2021 2022 2023
| DTC | Description |
|---|---|
| B1601 | Keyless access control unit internal (CPU) error |
| B1602 | Keyless access control unit internal (EEPROM) error |
| B1632 | MTR CONT signal error |
| B1640 | RF1 antenna not connected or malfunction |
| B1645 | Driver's door LF antenna circuit short |
| B1646 | Driver's door LF antenna circuit open |
| B1647 | Passenger's door LF antenna circuit short |
| B1648 | Passenger's door LF antenna circuit open |
| B1649 | Driver side rear passenger door LF antenna circuit short |
| B1650 | Driver side rear passenger door LF antenna circuit open |
| B1651 | Passenger side rear passenger door LF antenna circuit short |
| B1652 | Passenger side rear passenger door LF antenna circuit open |
| B1659 | Front interior LF antenna circuit short |
| B1660 | Front interior LF antenna circuit open |
| B1663 | Rear interior LF antenna circuit short |
| B1664 | Rear interior LF antenna circuit open |
| U1280 | Keyless access control unit communication bus line error (BUS-OFF) |
| U1281 | Keyless access control unit lost communication with MICU |
| DTC | Description |
|---|---|
| U128D | Keyless access control unit lost communication with gauge control module |
RENDER: 1.0x
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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.