Bipper Transmission Oil Pressure

That sounds like a tricky one. I've seen similar issues on other vehicles related to transmission oil pressure. A low oil level is often the culprit, as the sensor can trigger a fault when it's not getting consistent pressure. Have you checked the transmission oil level itself? It's not always easy to access, and you usually need specific tools and a dipstick designed for the transmission. Also, is the shifting consistently bad, or does it only happen under certain conditions, like when the engine is cold or under heavy load?

Thanks for the reply! I haven't actually checked the transmission oil level directly, mainly because I couldn't easily find the dipstick. I assumed it was a sealed unit. Where exactly is the dipstick located on the Bipper, and what kind of tool would I need to check it properly? And to answer your question, the shifting is noticeably worse when the engine is cold, but it doesn't completely disappear when it warms up.

Okay, if you can't easily find the dipstick, it might indeed be a sealed transmission. Some Bippers have them. In that case, checking the oil level properly involves removing a fill plug and using a special adapter to either drain and refill a specific amount or check the level at a specific temperature. Honestly, unless you're very comfortable working on transmissions, it's probably best to take it to a workshop. They'll have the right tools and know the correct procedure to avoid damaging the gearbox. The fact that it's worse when cold suggests the oil viscosity might be playing a role too.

Thanks, that's really helpful. I think you're right; I'll take it to a local garage. I got them to check the oil level, and it was indeed low. They topped it up and replaced the faulty sensor. The bill came to around 365€, but the problem seems to be solved now. No more warning lights or rough shifting! Appreciate the advice.