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.
Test Procedure
2021 Ford Edge SE, 4WDSECTION Test Procedure
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
- AU1 PRELIMINARY DIAGNOSIS NOTE: Diagnose and repair all circuit DTCs before diagnosing range or performance DTCs.
Are DTCs P0069 or P2226 present?
Yes No For DTC P2226, GO to AU2.
For all others, GO to AU5.RETURN to SYMPTOM CHARTS for further direction. - AU2 CHECK FOR DTCS
- Clear the DCU DTCs.
- Ignition ON, engine running.
- Ignition OFF.
- Ignition ON, engine OFF.
- Carry out the DCU self-test.
Is DTC P2226 present?
Yes No GO to AU3. The system is operating correctly at this time.
RETURN to SYMPTOM CHARTS for further direction. - AU3 CHECK BARO SENSOR OPERATION NOTE: Most local weather reports include a barometric pressure that is corrected to factor in sea level. However, the BARO PID indicates the barometric pressure for the actual vehicle altitude. Local weather conditions (high or low pressure) may change the local barometric pressure by several inches of mercury.
- Ignition ON, engine OFF.
- Access the PCM and monitor the BARO (PRESS) PID.
- Record the PID value.
- Verify that the BARO PID value is approximately the same as the daily barometric pressure from your local weather report.
Does the BARO PID value compare with the reported barometric pressure?
Yes No INSTALL a new RDCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . GO to AU4. - AU4 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test.
- Verify the concern is still present.
Is the concern still present?
Yes No INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time.
The concern may have been caused by a loose or corroded connector. - AU5 COMPARE THE KEY ON ENGINE OFF (KOEO) BARO AND MAP PID VALUES
- Ignition ON, engine OFF.
- Access the PCM and monitor the BARO (PRESS) and MAP (PRESS) PIDs.
Is the MAP sensor reading within 4.5 kPa (0.65 psi) of the BARO reading?
Yes No REMOVE and CHECK the MAP sensor for moisture, ice or any other type of restriction.
If necessary, INSTALL a new MAP sensor. REFER to the appropriate Electronic Engine Controls article.
Clear the PCM DTCs. REPEAT the self-test.INSTALL a new MAP sensor. REFER to the appropriate Electronic Engine Controls article.
Clear the PCM DTCs. 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.