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william_neumann10

C3 Automatic Transmission Problem

My 2002 Citroen C3 diesel with 198183 km is having automatic transmission issues. It's shifting strangely, the transmission light comes on, and sometimes it goes into emergency mode. Could old transmission oil be the problem?

Summary of the thread

A 2002 Citroen C3 diesel was experiencing automatic transmission issues, including strange shifting, a transmission warning light, and emergency mode activation. The potential causes identified were old transmission oil and undervoltage. The solution involved replacing the worn transmission oil, which resolved the shifting problems, and addressing the undervoltage issue.

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4 comment(s)

friedrichfuchs1

Interesting. I had similar issues with my old Volvo, though not exactly the same. Have you noticed any other electrical problems, like dimming lights or slow starting? Maybe it's an undervoltage issue?

william_neumann10 (community.author)

Undervoltage? Can low voltage only affect the automatic transmission without affecting other systems?

friedrichfuchs1

Yes. My undervoltage caused weird things with the auto box. I took it to a shop. They found a bad battery and worn transmission oil. Have you thought about seeing a mechanic?

william_neumann10 (community.author)

Undervoltage was the problem! The shop confirmed worn transmission oil, which they said was from the undervoltage. They replaced the oil for 240€, and the shifting is fixed.

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CITROEN

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C3