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.
Exhaust Fluid System Fault Procedure - Transit
2021 Ford Edge SE, 4WDSECTION Exhaust Fluid System Fault Procedure - Transit
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.
NOTE:
Verify that no DTCs are present and one of the Exhaust Fluid System Fault messages or the DEF System Fault message is present in the instrument cluster message center before carrying out the procedure.
The Exhaust Fluid System Procedure is carried out to clear the SCR system messages and allow the vehicle to exit the forced idle mode for the following messages:
- Engine Idled Soon Exhaust Fault See Manual
- Engine Idled See Manual Exhaust Fluid System Fault
- Access the PCM and monitor the AAT, EGT13, REDUCT_TNK_T and RPM PIDs.
- Verify the AAT PID and the REDUCT_TNK_T PID value is greater than -5°C (23°F). Start the engine. Increase the engine RPM to 2000 to 2500 RPM using the accelerator pedal. With the engine RPM elevated, monitor the EGT13 PID until the value is greater than 155 °C (311 °F) and the message in the message center has cleared.
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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.