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Skoda Kamiq Diesel Fuel Filter Heater Issue

I'm officially pulling my hair out! My 2021 Skoda Kamiq diesel is giving me grief. I've got an error stored in the error memory related to the fuel filter heater. The car feels sluggish, like it's lost a bunch of power, and the engine response is terrible. I'm also seeing higher fuel consumption than usual, and the idling is really uneven, almost a rough idle. I've been doing some digging, and it seems the likely cause is a defective cable or plug connection to the fuel filter heater. Has anyone else experienced this? Any advice on how to tackle this? It's driving me nuts!

4 comment(s)

Whoa, that sounds rough! A fuel filter heater issue on a Kamiq diesel isn't something you hear about every day, but it definitely explains the symptoms. Reduced power, rough idle, and higher fuel consumption are classic signs. The engine is probably struggling because it's not getting fuel properly, like trying to run a marathon with a blocked nose. Have you checked the basics, like making sure the fuel filter itself isn't clogged? Sometimes a simple filter replacement can make a world of difference, although it sounds like you are on the right track suspecting the heater connection, especially with the error code. Can you tell me what the error code actually says?

Thanks for the quick reply! I haven't replaced the fuel filter yet, as the error code specifically points to the fuel filter heater circuit. The exact code is PXXXX - 'Fuel Filter Heater A Circuit Malfunction'. I am not sure how to check the cable or plug connection. Any tips on what to look for specifically, or how to test it? I don't want to start poking around and make things worse, you know?

Ah, PXXXX, that confirms the fuel filter heater circuit issue. Given your symptoms and the error code, it's almost certainly the cable or plug, as you suspected. Honestly, unless you're comfortable with electrical testing and automotive wiring, it's probably best to take it to a workshop. Messing with electrical stuff without the right knowledge can lead to more problems than you started with. You could try visually inspecting the connector for corrosion or damage, but be careful. Given the relatively low cost of repair you mentioned, it's probably worth the peace of mind to have a professional sort it out.

Just wanted to say thanks for the help! I took it to a trusted mechanic, and they confirmed it was indeed the fuel filter heater connection, just like you suspected. The plug was corroded. They cleaned it up and replaced a short section of the wiring. Cost me 95€, and now it runs like a dream again! No more rough idle, the power is back, and hopefully, the fuel efficiency will improve too. Cheers!

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