Focus fuel filter heater fault

I've got a 2014 Ford Focus diesel, and I'm pulling my hair out! Seems like there's something screwy with the fuel filter heater. The error memory's lit up, and the engine's about as responsive as a brick. Power's way down, fuel consumption is through the roof, and the idling is rough. Checked the usual suspects, but haven't gotten anywhere. Any ideas?

4 comment(s)

The symptoms you describe do suggest a fault within the fuel system, specifically related to the fuel filter heater circuit. Have you observed any difficulty starting the engine, particularly in colder ambient temperatures? Could you describe the diagnostic steps you have already undertaken?

Cold starts are definitely a pain, she's a right pig to get going and sometimes stalls out completely. As for diagnostics, I've mainly focused on checking the fuel lines for blockages and verifying the fuel pump's operation. I haven't specifically looked at the fuel filter heater itself. What exactly should I be checking in that area?

Given the difficulty with cold starts, the fuel filter heater assembly is highly suspect. Given the diagnostic effort undertaken, and the details of the failure mode, I suggest you have the electrical integrity of the heater element tested. This would ideally involve checking the relevant cabling and connector for continuity and/or shorts. I suggest you take it to a workshop.

I took it to the workshop, and you were spot on. Turns out it was a dodgy cable/plug connection to the fuel filter heater, like you said. They cleaned it up and replaced the damaged section. Cost me 95€, but she's running like a dream now. Appreciate the help!

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