BMW 1 Series Limp Mode: Temp Sensor Issue Help Needed

Hey there! I had a similar issue with my 2017 BMW 2 Series last year. I've got some experience working on cars, but mostly basic maintenance stuff. When my car went into limp mode, I first panicked a bit! Took it to my regular workshop, and it turned out to be a loose connection in the wiring harness to the sensor. The mechanic found that the cable connector wasn't properly seated. Total repair cost was 95 Euro, mainly labor for diagnosing and fixing the connection. What's your current mileage and have you noticed any other symptoms? Like rough idling or changes in fuel consumption? This info would help figure out if you're dealing with the same problem I had. Best of luck!

Thanks for sharing your experience! I'm at 102352 KM and just had my service done recently. I've actually started noticing the idle being a bit rougher than usual for the past week or so, but didn't think much of it until this happened. No real changes in fuel consumption that I've spotted though. Did your mechanic mention if this is a common issue with BMWs? I'm wondering if I should take it to the dealer or if a regular workshop would be able to handle this. Just want to make sure I don't spend more than necessary while still getting it fixed properly.

Hey again! Yeah, after seeing your mileage and hearing about the rough idle, it definitely sounds similar to what I experienced! That's actually really interesting because my issue started showing up right around the 100,000 km mark too. From what my mechanic told me (and I've learned a bit since then), this is actually a fairly common issue with these BMWs. The wiring harness connection can get a bit loose over time, especially with all the engine vibration. I initially thought about taking it to the dealer too, but my regular workshop handled it perfectly fine. They have the right diagnostic tools for BMWs, and honestly, it's not a super complicated fix. The dealer would've probably charged triple what I paid, at least! One thing I learned from my experience, while the sensor itself can go bad, it's worth checking the connections first. My mechanic showed me how the connector was slightly corroded too, which contributed to the poor connection. They cleaned it up while they were at it. Since you're having similar symptoms, especially that rough idle, I'd recommend trying a trusted independent workshop first. Just make sure they're familiar with BMWs. Saved me a bunch of money, and the car's been running perfectly since then! Let me know how it goes, curious to hear if it turns out to be the same issue!

Thanks everyone, especially for the detailed reply about the wiring harness issue! I've decided to take your advice and booked it in with a well-reviewed independent workshop that specializes in European cars. They're going to check it out tomorrow morning. The rough idle combined with what you've shared about the similar mileage when your problem occurred really makes me think we might be dealing with the same issue. I actually called them already and mentioned the possibility of a loose connection or corroded connector in the wiring harness. They seemed to know exactly what I was talking about, which is reassuring! Said they'd check that first before looking at replacing any sensors. I'll update the thread once I get it sorted out. Really appreciate everyone's help, it's definitely made me feel less worried about the whole situation and hopefully saved me from an expensive dealer visit! Take care!