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.
2012 Acura ZDXFACTORY OEM SERVICE PROCEDURE
Keyless Access System DTCS
KEYLESS ACCESS DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B12A1 | Power Control Unit Internal (CPU) Error |
| DTC B12C5 | Engine Start/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 B1632 | MTR CONT Signal Error |
| DTC B1927 | MTR CONT Signal Error |
| DTC B1640 | RF Unit 1 Not Connected |
| DTC B1641 | RF Unit 2 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 B1662 | Middle Interior LF Antenna Circuit Open or Short |
| DTC B1664 | Rear Interior 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 B1901 | Remote Slot Control Unit Internal Error (CPU Error) |
| 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 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.