amelieghost1
Peugeot 307 gearbox oil temperature sensor fault
Summary of the thread
A 2009 Peugeot 307 diesel exhibited issues with the engine warning light, transmission oil temperature sensor fault, emergency mode activation, rough gear shifts, and occasional grinding noise. The problem was identified as low gearbox oil, potentially due to a broken sensor. The solution involved topping up the gearbox oil and replacing the faulty temperature sensor, which resolved the issues.
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4 comment(s)
amelieghost1 (community.author)
Thanks. Is the gearbox oil level easy to check, or is it best left to a professional with special equipment?
danielkaiser6
On the Megane, the fill plug was tricky to access. Unless you're comfortable working under the car and know the proper procedure, I'd recommend having a workshop check the oil level. It's a quick job for them, and they can advise you on any leaks.
amelieghost1 (community.author)
Turns out the issue was low gearbox oil, probably from a broken sensor! After topping up the oil and replacing the temperature sensor, the problem seems to be fixed. Total cost was 365€ Thank you for pointing me in the right direction.
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PEUGEOT
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307
danielkaiser6
I had similar symptoms on my old Renault Megane. The gearbox would act up, and the error codes pointed to a temperature sensor issue. Did you check the gearbox oil level? In my case it was simply too low.