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martha_schneider5

SantaFe rough cold starting

Hi, I'm having a head-scratcher with my 2009 Hyundai SantaFe diesel. It's got about 139,000 km on the clock. Lately, it's running pretty rough when cold starting. I've also got an error code popping up, and the fuel consumption seems higher than usual. After digging, I suspect it might be the PTC heater causing the issue. Anyone else experienced similar symptoms? Could a defective electric auxiliary heater really cause all these problems?

Summary of the thread

A 2009 Hyundai SantaFe diesel is experiencing rough running during cold starts, an error code, and increased fuel consumption. The suspected cause is a faulty PTC heater, which is an electric auxiliary heater. A similar case confirmed that a defective PTC heater can lead to these issues, and the recommended solution is to have it checked and possibly replaced by a professional.

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4 comment(s)

dieter_werner2

Interesting. I also own a SantaFe with a diesel engine, and had something similar happen last winter. Did you check the blower motor and heating element? Is the heat not working at all, or is it just weak until the engine warms up? An electrical fault in the heating system could definitely cause those symptoms, especially the poor running and increased fuel consumption.

martha_schneider5 (community.author)

Thanks for the quick reply! When you say similar, do you mean all the same symptoms? Rough running on cold starts, error codes, and increased fuel consumption? And if it was the PTC heater, what was the fix?

dieter_werner2

Yes, all of the above. The rough running was the most noticeable. I took it to a workshop, and they diagnosed a faulty PTC heater. Considering the symptoms and the potential impact on fuel economy, I would recommend getting it checked by a professional. They quoted me around 350€ for the repair.

martha_schneider5 (community.author)

Okay, that's good to know. I appreciate the confirmation. Sounds like I'll be heading to the workshop to get the heating element checked out and probably replaced. Thanks for your help!

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HYUNDAI

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SANTAFE