hermannflamme62
Peugeot 1007 automatic transmission issues
Summary of the thread
A 2005 Peugeot 1007 diesel with 127,681 km is experiencing erratic automatic transmission issues, including implausible shifting, an illuminated transmission indicator light, and occasional emergency mode activation. Potential causes include worn transmission oil and undervoltage from a weak battery. Solutions involve testing and possibly replacing the battery, checking the transmission, and performing a transmission flush. After addressing these issues, the car's transmission performance improved significantly.
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4 comment(s)
hermannflamme62 (community.author)
That's a good point. I haven't checked the battery specifically, but the car starts fine. Could a slightly weak battery really cause such dramatic transmission issues? What did you experience?
wolfgang_crystal1
Yes, even if the car starts, a slightly weak battery can cause havoc with the automatic transmission's electronic control unit. I had the same symptoms: erratic shifting and the emergency mode. I'd suggest getting the battery properly tested and the transmission checked at a workshop.
hermannflamme62 (community.author)
Thanks for the advice! I took it to a workshop, and you were spot on. The battery was indeed weak, and the transmission oil was worn out. Got them both replaced, along with a transmission flush. Cost me 240€, but it fixed the problem! The car shifts smoothly now.
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PEUGEOT
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1007
wolfgang_crystal1
Interesting. I had similar problems with my 1007's automatic gearbox. Is your battery on its last legs? Low voltage can definitely mess with the electronics controlling the transmission. Have you checked the battery's health recently?