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lillymueller9

Talisman diesel rough cold starts

My 2021 Renault Talisman diesel has been running rough on cold starts lately. I'm seeing increased fuel consumption and a stored error related to the heating system. Suspect it's the PTC heater acting up at 157789 km. Anyone else experience this?

Summary of the thread

A 2021 Renault Talisman diesel is experiencing rough cold starts, increased fuel consumption, and an error related to the heating system. The issue is suspected to be a malfunctioning PTC heater, which is crucial for pre-heating the engine coolant. This defect can lead to inefficient engine performance and higher fuel usage. A professional diagnosis and repair are recommended to resolve the problem.

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4 comment(s)

dominikherrmann1

I have the same model. Sounds awfully familiar. When the blower motor kicks in, does it feel like you're getting cold air even when the engine is warm? The electric auxiliary heater might be the culprit. Think of it like a small electric kettle that pre-heats the coolant; if it fails, the engine struggles a bit more when it's cold.

lillymueller9 (community.author)

Interesting analogy. The cold air feeling is intermittent. You think a defective auxiliary heater can seriously impact fuel consumption and cold start performance, though?

dominikherrmann1

Absolutely. It's like trying to boil water with a cracked kettle – inefficient and takes longer. The engine works harder to compensate, hence the fuel consumption increase. The error code nails it, though. Best to get it checked professionally before winter hits. That thing doesn't fix itself.

lillymueller9 (community.author)

Roger that. Will book it in for a proper diagnosis. Anticipating around 350€ for the fix. Thanks for the insight!

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RENAULT

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TALISMAN