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 MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (ENGINE CONTROLS - PINPOINT TESTS (DIESEL))PINPOINT TESTS K: ENGINE COOLANT TEMPERATURE (ECT) SENSORTEST PROCEDURE
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Test Procedure
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION 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.
- K1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Are DTCs P0115, P0116, P0117, P0118, P0128, P1116, P2182, P2183, P2184, or P2185 present?
Yes No GO to K2. RETURN to SYMPTOM CHARTS for further direction. - K2 CHECK THE ENGINE COOLANT LEVEL WARNING: ALWAYS ALLOW THE ENGINE TO COOL BEFORE OPENING THE COOLING SYSTEM. DO NOT UNSCREW THE COOLANT PRESSURE RELIEF CAP WHEN THE ENGINE IS OPERATING OR THE COOLING SYSTEM IS HOT. THE COOLING SYSTEM IS UNDER PRESSURE; STEAM AND HOT LIQUID CAN COME OUT FORCEFULLY WHEN THE CAP IS LOOSENED SLIGHTLY. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY.
- Check the engine coolant and the secondary cooling system levels.
Is the coolant fill level correct?
Yes No GO to K3. REFER to the appropriate Engine Cooling article, Diagnosis and Testing to continue diagnosis.
Clear the PCM DTCs. REPEAT the self-test. - K3 CHECK THE RESISTANCE OF THE ECT OR THE ECT2 SENSORS WITH THE ENGINE OFF NOTE: Verify the engine temperature is at ambient room temperature before continuing with this test. A soak period of 8 hours may be required. Refer to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for information concerning DTC P0115, P0116, P1116 or P2183.
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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.