Light K Orange XSara Coupé 167 hp 1999

Hello.

I have a 1999 Citroën Xsara Coupé petrol, 167 hp. For some time now, about 10 minutes after starting the engine, the orange "K" light comes on in the dashboard and the engine starts to misfire and barely accelerates. The next day, when I start it again, it starts perfectly, the engine runs perfectly, but after 10-12 minutes, the same light comes on and it starts misfiring, barely accelerating. What could be wrong? The engine has 150,000 kilometers, it's always been serviced at a Citroën dealership, and the catalytic converter and front lambda sensor were replaced a while ago. What could be the problem?

The first thing you should do is connect the diagnostic tool, but your problem seems to be in the high-voltage ignition coils, a common failure in this type of engine.

Thank you so much!

If it turns out to be the coil... is the repair very expensive?

Thanks again and best regards.

If it's not sparking, then I don't think it's the coil. I'm leaning more towards the temperature sensor or fuel pump. Anyway, if the light is on, it's best to get it scanned

Thanks again. Yes, I'll take it to the dealership to have it scanned; I'm afraid they'll charge me for it... Anyway, what I find most strange is that everything is fine for the first 10 minutes. The car runs well, accelerates perfectly, and the orange K light doesn't come on. After 10-12 minutes, when the engine warms up, the problem starts. The light comes on, and the car starts to have much less power. Why does it happen after 10 minutes and not right after starting? That's what's puzzling me the most.

Thanks again, and best regards.