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.
2021 Ford Explorer XLT, RWDFACTORY OEM SERVICE PROCEDURE
P2BF3 - Fuel Control System B Too Rich Bank 2
DTC DESCRIPTION P2BF3 - FUEL CONTROL SYSTEM B TOO RICH BANK 2
| Description: | The adaptive fuel strategy continuously monitors the fuel delivery hardware. This DTC sets when the adaptive fuel tables reach a lean calibrated limit. Refer to Powertrain Control Software, Fuel Trim for additional information. | ||
| Possible Causes: |
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| Diagnostic Aids: | View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs. Refer to Adaptive Fuel Diagnostic Trouble Code (Dtc) Diagnostic Techniques, for additional information and the appropriate pinpoint test for specific concern identification. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test H. | ||
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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