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karenhoffmann1

Peugeot Expert Transmission Issues

I'm having a perplexing issue with my 2009 Peugeot Expert diesel (145,717 kilometers). The engine warning light is on, and I suspect it's the transmission. The gearbox is slipping, shifting erratically, and making grinding sounds during gear changes. An error code indicates a fault with the transmission oil temperature sensor. Any insight?

Summary of the thread

A 2009 Peugeot Expert diesel exhibited transmission issues, including slipping, erratic shifting, and grinding sounds, accompanied by an engine warning light. An error code pointed to a transmission oil temperature sensor fault. The problem was traced to a critically low gearbox oil level, which was resolved by topping up the oil and replacing the faulty sensor, leading to the resolution of the issues.

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4 comment(s)

theoraven2

The symptoms sound like transmission overheating problems. The sensor fault is a good clue. Have you checked the gearbox oil level? Low oil can cause the transmission to overheat, leading to sensor errors and the symptoms you're seeing. When was the transmission oil last changed or checked?

karenhoffmann1 (community.author)

I haven't personally checked the gearbox oil level, as I'm not confident I can do it correctly. Could a low oil level really be the only cause, or could there be other underlying problems?

theoraven2

While other issues could contribute, a low oil level is a prime suspect given the symptoms and error code. It's best to take it to a workshop; they'll be able to confirm the oil level, check for leaks, and properly diagnose the sensor itself. If it is just a sensor, that will be easy to replace.

karenhoffmann1 (community.author)

I took the Peugeot to a local garage, and the gearbox oil level was critically low. After topping it up and replacing the faulty transmission oil temperature sensor, the issues are resolved. The total cost was 365€.

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PEUGEOT

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EXPERT