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 MANUALSACURA2015TLX BASE, 2.4L ENGREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXKEYLESS ACCESS POWER CONTROL UNIT DTCS
2015 Acura TLX Base, 2.4L Eng
Keyless Access Power Control Unit DTCS
2015 Acura TLX Base, 2.4L EngSECTION Keyless Access Power Control Unit DTCS
2015-17
| DTC | Description | DTC type |
|---|---|---|
| B12C5 | Engine start/stop switch failure | Signal error |
| B12C6 | Electric steering lock switch C/D monitor circuit failure | Signal error |
| B12C7 | Electric steering lock switch C/D monitor circuit failure | Signal error |
| B12D0 | Power control unit IG1A circuit error | Internal error |
| B12D1 | Power control unit IG1B circuit error | Internal error |
| B12D2 | Power control unit IG2 circuit error | Internal error |
| B12D3 | Power control unit IG latch circuit error | Internal error |
| B12E0 | Electric steering lock switch internal error | Internal error |
| B12E1 | Electric steering lock motor internal error | Internal error |
| B12E2 | Electric steering lock low level failure of MTRCUT1 | Signal error |
| B12E3 | Electric steering lock high level failure of MTRCUT1 | Signal error |
| B12E4 | Electric steering lock high level failure of MTRCUT2 | Signal error |
| B12E5 | Incorrect assembly of control unit for electric steering lock equipped vehicle | Signal error |
| B12F0 | Power control unit lost communication with electric steering lock | Loss of communication |
| B12F3 | Power control unit lost communication with transmission control unit | Loss of communication |
| U0073 - Refer to: DTC Troubleshooting: U0073 (Keyless Access Power Control Unit without CAN Gateway) (2015-17) or DTC Troubleshooting: U0073 (Keyless Access Power Control Unit with CAN Gateway) (2015-17) | F-CAN communication bus line error | Loss of communication |
| U0100 - Refer to: DTC Troubleshooting: U0100 (L4, Keyless Access Power Control Unit) (2015-17) or DTC Troubleshooting: U0100 (V6, Keyless Access Power Control Unit without CAN Gateway) (2015-17) or DTC Troubleshooting: U0100 (V6, Keyless Access Power Control Unit with CAN Gateway) (2015-17) | Power control unit lost communication with PCM | Loss of communication |
| U0122 - Refer to: DTC Troubleshooting: U0122 (L4, Keyless Access Power Control Unit) (2015-17) or DTC Troubleshooting: U0122 (V6, Keyless Access Power Control Unit without CAN Gateway) (2015-17) or DTC Troubleshooting: U0122 (V6, Keyless Access Power Control Unit with CAN Gateway) (2015-17) | Power control unit lost communication with VSA modulator-control unit (VSA message) | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | Power control unit lost communication with MICU | Loss of communication |
| U128D | Power control unit lost communication with gauge control module | Loss of communication |
2018-20
| DTC | Description | DTC type |
|---|---|---|
| B12C5 | Engine start/stop switch failure | Signal error |
| B12C6 | Electric steering lock switch C/D monitor circuit failure | Signal error |
| B12C7 | Electric steering lock switch C/D monitor circuit failure | Signal error |
| B12D0 | Power control unit IG1A circuit error | Internal error |
| B12D1 | Power control unit IG1B circuit error | Internal error |
| B12D2 | Power control unit IG2 circuit error | Internal error |
| B12D3 | Power control unit IG latch circuit error | Internal error |
| B12E0 | Electric steering lock switch internal error | Internal error |
| B12E1 | Electric steering lock motor internal error | Internal error |
| B12E2 | Electric steering lock low level failure of MTRCUT1 | Signal error |
| B12E3 | Electric steering lock high level failure of MTRCUT1 | Signal error |
| B12E4 | Electric steering lock high level failure of MTRCUT2 | Signal error |
| B12E5 | Incorrect assembly of control unit for electric steering lock equipped vehicle | Signal error |
| B12F0 | Power control unit lost communication with electric steering lock | Loss of communication |
| DTC | Description | DTC type |
|---|---|---|
| B12F3 | Power control unit lost communication with transmission control unit | Loss of communication |
| U0073 - Refer to: DTC Troubleshooting: U0073 (Keyless Access Power Control Unit with CAN Gateway) (2015-17) | F-CAN communication bus line error | Loss of communication |
| U0100 - Refer to: DTC Troubleshooting: U0100, U0122 (L4, Keyless Access Power Control Unit) (2018-19) or DTC Troubleshooting: U0100, U0122 (V6, Keyless Access Power Control Unit) (2018-19) | Power control unit lost communication with PCM | Loss of communication |
| U0122 - Refer to: DTC Troubleshooting: U0100, U0122 (L4, Keyless Access Power Control Unit) (2018-19) or DTC Troubleshooting: U0100, U0122 (V6, Keyless Access Power Control Unit) (2018-19) | Power control unit lost communication with VSA modulator-control unit (VSA message) | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U1281 | Power control unit lost communication with MICU | Loss of communication |
| U128D | Power control unit lost communication with gauge control module | Loss of communication |
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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.