dirkdunkel81
Seat Tarraco Diesel Preheating Lamp Issue
Summary of the thread
A 2021 Seat Tarraco diesel owner reported a persistent issue with the preheating lamp on the dashboard not switching off after starting the engine, accompanied by a related error in the memory scan pointing to the glow plugs. The problem was suspected to be due to a defective glow plug, which can also cause symptoms like rough idle and reduced fuel efficiency. After consulting a workshop, the issue was confirmed and resolved by replacing the faulty glow plug, restoring normal function to the preheating lamp and eliminating the error.
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4 comment(s)
dirkdunkel81 (community.author)
Yes, I also experienced the engine light. You mentioned an engine misfire. Was it noticeable, and under what conditions did it occur? Did you also notice any other symptoms besides the preheating lamp and the engine light?
ella_mystic1
Yeah, the misfire was subtle, almost like a slight hesitation, but definitely noticeable when the engine was cold and under load, like going uphill. Honestly, after fiddling around myself for a bit, I just took it to a workshop. Glow plugs can be a pain to get to, and I didn't want to risk messing anything else up. Save yourself the headache and just get it checked out. You'll probably be back on the road in no time!
dirkdunkel81 (community.author)
Thank you for sharing your experience! It sounds like our issues were very similar. I took it to a trusted workshop, and they confirmed it was indeed a faulty glow plug. After replacing it, the preheating lamp now switches off as expected, and the error is gone. The final bill came to about 440€, which is a bit steep, but worth it to have the car running smoothly again.
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SEAT
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TARRACO
ella_mystic1
Whoa, sounds familiar! I had a similar issue with my Tarraco. The preheating light stayed on forever, and the engine light popped up too. I even noticed a slight engine misfire sometimes, especially when it was cold. Did you notice any difference in fuel efficiency or a rough idle? It could be the glow plugs, like you suspected.