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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD2021F-150 LIMITED, 3.5L ENG VIN 8, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTMEMORY MODULESENGINE CONTROLS - PINPOINT TESTS (EXCEPT DIESEL & HYBRID) (A TO H)PINPOINT TESTS DX: ENGINE COOLANT TEMPERATURE (ECT) SENSORTEST PROCEDURE
2021 Ford F-150 Limited, 3.5L Eng VIN 8, RWD
Test Procedure
2021 Ford F-150 Limited, 3.5L Eng VIN 8, RWDSECTION Test Procedure
- DX1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Are DTCs P0116, P0117, P0118, P0119, P011E, P0125, P0128, P1116, P1117, or P111B present?
Yes No For DTCs P0125, P0128 or P111B, GO to DX10
For all others, GO to DX2For symptoms without DTCs, GO to DX2
For all others, RETURN to Symptom Charts for further direction. - DX2 CHECK THE COOLING SYSTEM WARNING: TO AVOID PERSONAL INJURY DO NOT UNSCREW THE COOLANT PRESSURE RELIEF CAP WHILE THE ENGINE IS OPERATING OR 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 PERSONAL INJURY.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.