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.
2018 Ford Fusion Energi TitaniumFACTORY OEM SERVICE PROCEDURE
DTC P0811 - Excessive Clutch A Slippage
P0811 - EXCESSIVE CLUTCH A SLIPPAGE
| Description: | This DTC sets when the engine speed measured by the PCM exceeds the engine speed measured at the transmission by a calibrated threshold. | ||
| Possible Causes: |
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| Diagnostic Aids: | Diagnose and repair any CKP sensor DTCs first. This DTC is intended to diagnose a slipping or damaged transmission damper. Start the engine. If the engine starts but this DTC sets again, the CKP sensor or wiring is suspect. If the engine does not start but the generator can be heard spinning, replace the transmission damper. Refer to the appropriate Engine System article. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the DTC. | ||
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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