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jenniferklein10

Venue Diesel Rough Cold Starts

My 2021 Hyundai Venue diesel is running rough during cold starts with 146k km. I've got an error code and increased fuel consumption. Could the PTC heater be the issue?

Summary of the thread

A 2021 Hyundai Venue diesel is experiencing rough cold starts, an error code, and increased fuel consumption, potentially linked to a defective PTC heater. The slow cabin heating suggests the PTC heater might be affecting the engine's warm-up cycle, leading to poor performance and higher fuel use. A similar issue was resolved by replacing the PTC heater, and it's recommended to have a professional check and replace it to avoid further complications.

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4 comment(s)

JessiWheels

I have a Venue too, and your symptoms sound familiar. I had similar problems – rough starts, error codes, and poor fuel economy. I didn't initially suspect the PTC heater, but your post makes me think. Was the cabin heat slow to warm up?

jenniferklein10 (community.author)

Yes, the heat is slow to get going. Did you also experience this with the rough starts and increased fuel consumption? Did you sort it out yourself, or did you take it to a shop?

JessiWheels

The slow cabin heating was definitely part of it. I spent ages trying to trace an electrical fault with the HVAC system, but eventually I had the workshop take a look. They confirmed it was a defective electric auxiliary heater, the PTC heater. The mechanic said it was affecting the engine's warm-up cycle, hence the poor running and extra fuel use. Unless you're confident with electrical diagnostics, I'd suggest getting it checked out. Could save you a headache.

jenniferklein10 (community.author)

Thanks for the insight! It confirms my suspicion. I'll book it in with a local shop to get the PTC heater replaced. They quoted around 350€ for the repair, which seems reasonable. I'll post the solution once it's resolved.

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HYUNDAI

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VENUE