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.
2010 Mercury Mariner Premier, 2.5 7, FWDFACTORY OEM SERVICE PROCEDURE
Parking Aid DTCS
Parking Aid Module (PAM) DTC Chart
| DTC | Description | Action |
|---|---|---|
| B129C:12 (with active park assist) | Left Front Side Sensor: Circuit Short To Battery | REFER to DIAGNOSIS AND TESTING . |
| B129C:14 (with active park assist) | Left Front Side Sensor: Circuit Short To Ground Or Open | REFER to DIAGNOSIS AND TESTING . |
| B129C:96 (with active park assist) | Left Front Side Sensor: Component Internal Failure | REFER to DIAGNOSIS AND TESTING . |
| B129D:12 (with active park assist) | Right Front Side Sensor: Circuit Short To Battery | REFER to DIAGNOSIS AND TESTING . |
| B129D:14 (with active park assist) | Right Front Side Sensor: Circuit Short To Ground Or Open | REFER to DIAGNOSIS AND TESTING . |
| B129D:96 (with active park assist) | Right Front Side Sensor: Component Internal Failure | REFER to DIAGNOSIS AND TESTING . |
| B1303:11 (with active park assist) | Park Assist Switch: Circuit Short To Ground | REFER to DIAGNOSIS AND TESTING . |
| B1304:68 (with active park assist) | Electronic Power Assisted Steering System: Event Information | REFER to DIAGNOSIS AND TESTING . |
| B1B44:12 | Right Rear Outer Sensor: Circuit Short To Battery | GO to PINPOINT TEST C . |
| B1B44:14 | Right Rear Outer Sensor: Circuit Short To Ground Or Open | GO to PINPOINT TEST B . |
| B1B44:96 | Right Rear Outer Sensor: Component Internal Failure | GO to PINPOINT TEST D . |
| B1B46:12 | Right Rear Inner Sensor: Circuit Short To Battery | GO to PINPOINT TEST C . |
| B1B46:14 | Right Rear Inner Sensor: Circuit Short To Ground Or Open | GO to PINPOINT TEST B . |
| B1B46:96 | Right Rear Inner Sensor: Component Internal Failure | GO to PINPOINT TEST D . |
| B1B48:12 | Left Rear Outer Sensor: Circuit Short To Battery | GO to PINPOINT TEST C . |
| B1B48:14 | Left Rear Outer Sensor: Circuit Short To Ground Or Open | GO to PINPOINT TEST B . |
| B1B48:96 | Left Rear Outer Sensor: Component Internal Failure | GO to PINPOINT TEST D . |
| B1B50:12 | Left Rear Outer Sensor: Circuit Short To Battery | GO to PINPOINT TEST C . |
| B1B50:14 | Left Rear Outer Sensor: Circuit Short To Ground Or Open | GO to PINPOINT TEST B . |
| B1B50:96 | Left Rear Outer Sensor: Component Internal Failure | GO to PINPOINT TEST D . |
| B1B52:12 | Rear Sounder-Park Aid: Circuit Short To Battery | GO to PINPOINT TEST F . |
| B1B52:14 | Rear Sounder-Park Aid: Circuit Short To Ground Or Open | GO to PINPOINT TEST F . |
| B1B58:11 | Rear Sensor Power Circuit: Circuit Short To Ground | GO to PINPOINT TEST E . |
| B1B54:11 (with active park assist) | Function LED-Park Aid: Circuit Short To Ground | REFER to DIAGNOSIS AND TESTING . |
| B1B54:13 (with active park assist) | Function LED-Park Aid: Circuit Open | REFER to DIAGNOSIS AND TESTING . |
| U0100:00 (with active park assist) | Lost Communication With ECM /PCM "A": No Sub Type Information | REFER to DIAGNOSIS AND TESTING . |
| U0101:00 (with active park assist) | Lost Communication With TCM: No Sub Type Information | REFER to DIAGNOSIS AND TESTING . |
| U0121:00 (with active park assist) | Lost Communication With Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | REFER to DIAGNOSIS AND TESTING . |
| U0131:00 (with active park assist) | Lost Communication With Power Steering Control Module: No Sub Type Information | REFER to DIAGNOSIS AND TESTING . |
| U0155:00 (with active park assist) | Lost Communication With Instrument Panel Cluster (IPC ) Control Module: No Sub Type Information | REFER to DIAGNOSIS AND TESTING . |
| U0401:00 (with active park assist) | Invalid Data Received From ECM /PCM A: No Sub Type Information | This DTC sets when the Parking Aid Module (PAM) receives invalid network data from the PCM with a faulted signal data input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to DIAGNOSIS AND TESTING for a list of all DTCs. |
| U0402:00 (with active park assist) | Invalid Data Received From TCM: No Sub Type Information | This DTC sets when the PAM receives invalid network data from the PCM with a faulted signal data input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to DIAGNOSIS AND TESTING for a list of all DTCs. |
| U0415:00 (with active park assist) | Invalid Data Received From Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | This DTC sets when the PAM receives invalid network data from the ABS module with a faulted signal data input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to DIAGNOSIS AND TESTING for a list of all DTCs. |
| U0420:00 (with active park assist) | Invalid Data Received From Power Steering Control Module: No Sub Type Information | This DTC sets when the PAM receives invalid network data from the Power Steering Control Module (PSCM) with a faulted signal data input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to DIAGNOSIS AND TESTING for a list of all DTCs. |
| U0423:00 (with active park assist) | Invalid Data Received From Instrument Panel Cluster (IPC ) Control Module: No Sub Type Information | This DTC sets when the PAM receives invalid network data from the Instrument Cluster (IC) with a faulted signal data input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to DIAGNOSIS AND TESTING for a list of all DTCs. |
| U2024:41 | Control Module Cal-Config Data: General Checksum Failure | CLEAR the DTCs. REPEAT the PAM self-test. If DTC U2024:41 is retrieved again, CARRY OUT Programmable Module Installation (PMI). REFER to PROGRAMMABLE MODULE INSTALLATION (PMI) . REPEAT the self-test. If DTC U2024:41 is retrieved again, INSTALL a new PAM . REFER to PARKING AID MODULE (PAM) . CLEAR all DTCs. REPEAT the self-test. |
Factory Service Tools
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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.
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