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.
Keyless Access System DTCS
/Stop Switch Failure DTC B12C6 Electric Steering Lock Switch C/D Monitor Circuit Failure DTC B12C7 Electric Steering Lock Motor Circuit Failure DTC B12D0 Power Control Unit IG1A Circuit Error DTC B12D1 Power Control Unit IG1B Circuit Error DTC B12D2 Power Control Unit IG2 Circuit Error DTC B12D3 Power Control Unit IG Latch Circuit Error DTC B12E0 Electric Steering Lock Switch Internal Error DTC B12E1 Electric Steering Lock Motor Internal Error DTC B12E2 Electric Steering Lock Low Level Failure of MTRCUT1 DTC B12E3 Electric Steering Lock High Level Failure of MTRCUT1 DTC B12E4 Electric Steering Lock High Level Failure of MTRCUT2 DTC B12F0 Power Control Unit Lost Communication With Electric Steering Lock DTC B12F1 Power Control Unit Lost Communication With Remote Slot Control Unit DTC B12F2 Power Control Unit Lost Communication With Keyless Access Control Unit DTC U0155 Power Control Unit Lost Communication With Gauge Control Module DTC U0199 Power Control Unit Lost Communication With Door Multiplex Control Unit DTC B1601 Keyless Access Control Unit Internal (CPU) Error DTC B1602 Keyless Access Control Unit Internal (EEPROM) Error DTC B1927 MTR CONT Signal Error DTC B1640 RF Unit Not Connected DTC B1646 Driver's Door LF Antenna Circuit Open or Short DTC B1648 Passenger's Door LF Antenna Circuit Open or Short DTC B1658 Rear Bumper LF Antenna Circuit Open or Short DTC B1660 Front Interior LF Antenna Circuit Open or Short DTC B1664 Rear Interior LF Antenna Circuit Open or Short DTC B1668 Rear Shelf LF Antenna Circuit Open or Short DTC U0155 Keyless Access Control Unit Lost Communication With Gauge Control Module DTC U0199 Keyless Access Control Unit Lost Communication With Door Multiplex Control Unit DTC U1282 Keyless Access Control Unit Lost Communication With Driver's MICU DTC U1283 Keyless Access Control Unit Lost Communication With Passenger's MICU DTC B1902 Remote Slot Control Unit Internal Error (EEPROM Error) DTC B1926 Remote Slot Antenna Open or Short DTC B1930 Remote Slot Control Unit LOCK/ UNLOCK Error DTC B1931 Remote Slot Control Unit no Response DTC U0155 Remote Slot Control Unit Lost Communication With Gauge Control Module
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.