CMAX diesel rough running and drift compensation error

I'm having trouble with my 2015 Ford C-MAX diesel. The engine is running rough, the check engine light is on, and I've got an error stored about "reset quantity drift compensation". Mileage is at 130597 km. Could a defective injection valve/injector be causing this? I'm not sure about the system reset procedure.

4 comment(s)

Sounds familiar! I had a similar issue on my Ford C-MAX. Are you experiencing any airflow sensor issues alongside the error? It could be related. Have you checked the car sensors recently?

Thanks for the quick reply! I haven't specifically checked the airflow sensors, but is there a specific car sensor I should focus on related to the drift compensation? I am not sure where to start, any hints?

Yes. It's most likely a defective injector. I ended up having to take mine to the workshop. They reset the quantity drift compensation and replaced the faulty injector to fix it. Prepare for a bill, I paid 515€...

Thank you so much for the confirmation! I appreciate you sharing your experience, it's really helpful. I will go to the workshop and get the injector checked/replaced, and have them reset the drift compensation. Fingers crossed!

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