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 MANUALSMERCURY2009MOUNTAINEER 4.6 8, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONDTC INDEXEXTERIOR/INTERIOR TRIM DTCSEXTERIOR TRIM AND ORNAMENTATION
2009 Mercury Mountaineer 4.6 8, RWD
Exterior Trim And Ornamentation
2009 Mercury Mountaineer 4.6 8, RWDSECTION Exterior Trim And Ornamentation
POWER RUNNING BOARD (PRB) MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1162 | Power Running Board Hall-Effect Sensor Power Circuit Short to Battery | Go to Pinpoint Test E . |
| B1163 | Left Power Running Board Hall-Effect Sensor Failure | Go to Pinpoint Test E . |
| B1164 | Power Running Board Hall-Effect Sensor Power Circuit Short to Ground | Go to Pinpoint Test E . |
| B1167 | Left Power Running Board Deploy and/or Stow Circuit Short to Battery | Go to Pinpoint Test D . |
| B1168 | Left Power Running Board Stow Circuit Short to Ground | Go to Pinpoint Test D . |
| B1169 | LH Motor Traveled Too Far | LH motor is freewheeling (broken geartrain linkage). INSTALL a new LH PRB motor. REFER to Power Running Board (PRB) Motor . |
| B116A | RH Motor Traveled Too Far | RH motor is freewheeling (broken geartrain linkage). INSTALL a new RH PRB motor. REFER to Power Running Board (PRB) Motor . |
| B116B | LH Power Running Board Motor Short | Go to Pinpoint Test D . |
| B116C | RH Power Running Board Motor Short | Go to Pinpoint Test D . |
| B116D | LH Power Running Board Motor Line Open | Go to Pinpoint Test D . |
| B116E | RH Power Running Board Motor Line Open | Go to Pinpoint Test D . |
| B1170 | Right Power Running Board Hall-Effect Sensor Failure | Go to Pinpoint Test E . |
| B1171 | Left Power Running Board Hall-Effect Signal Noisy | INSTALL a new LH PRB motor. REFER to Power Running Board (PRB) Motor . |
| B1172 | Right Power Running Board Hall-Effect Signal Noisy | INSTALL a new RH PRB motor. REFER to Power Running Board (PRB) Motor . |
| B1175 | Right Power Running Board Stow Circuit Short to Ground | Go to Pinpoint Test D . |
| B1178 | Right Power Running Board Deploy and/or Stow Circuit Short to Battery | Go to Pinpoint Test D . |
| B1317 | Battery Voltage High | REFER to CHARGING SYSTEM - GENERAL INFORMATION article. |
| B1318 | Battery Voltage Low | REFER to CHARGING SYSTEM - GENERAL INFORMATION article. |
| B1342 | ECU is Faulted | INSTALL a new PRB module. REFER to Power Running Board (PRB) Motor . |
| B2139 | Data Mismatch (receive data does not match what was expected) | RETRIEVE and FOLLOW instrument cluster (IC) and PCM DTCs. REFER to MULTIFUNCTION ELECTRONIC MODULES article and Introduction - Gasoline Engines article. |
| B2813 | LH Power Running Board Stow Time Fail | Go to Pinpoint Test F . |
| B2814 | LH Power Running Board Deploy Time Fail | Go to Pinpoint Test F . |
| B2816 | RH Power Running Board Stow Time Fail | Go to Pinpoint Test F . |
| B2817 | RH Power Running Board Deploy Time Fail | Go to Pinpoint Test F . |
| U1900 | CAN Communication Bus Fault - Receive Error | REFER to MODULE COMMUNICATIONS NETWORK article. |
| U2050 | No Application Present | INSTALL a new PRB module. REFER to Power Running Board (PRB) Module . REPEAT the self-test. |
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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.