ninadragon1
Seat Leon Diesel Engine Power Loss
Summary of the thread
A 2020 Seat Leon with a diesel engine is experiencing power loss, rough running, and jerking during acceleration, accompanied by a check engine light. The issue is suspected to be related to a lean fuel condition, potentially caused by faulty fuel injectors. After considering other possibilities like the oxygen sensor or EGR valve, it is advised to have a professional diagnose the problem. Ultimately, a faulty fuel injector is identified and replaced, resolving the issue.
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4 comment(s)
ninadragon1 (community.author)
Fuel injectors, huh? I've heard of those, but aren't they a pain to get to? And how would I even know if they're the problem? Could it be something else, like the oxygen sensor or maybe even the EGR valve?
vivienraven1
The symptoms do point towards fuel delivery issues. While an oxygen sensor or EGR valve could be involved, the jerking under acceleration is a strong indicator of fuel injectors not working correctly. It's best to get a professional diagnosis to confirm. They can test the injectors individually. It's not a simple DIY job unless you have experience. I'd recommend taking it to a trusted workshop.
ninadragon1 (community.author)
Just wanted to say I got this sorted. The mechanic found a faulty fuel injector, just like you said. Replaced them all to be safe, cost 515€. Runs like new now, thanks for the heads up!
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SEAT
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LEON
vivienraven1
I had a similar issue with my Seat Leon, though it's not a 2020 model. The symptoms sound familiar. Have you checked the fuel injectors? A lean condition often points to them not delivering enough fuel.