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manfredlang1

C1 automatic gearbox issues

My 2008 Citroen C1 diesel's auto 'box is playing up. 75k km on the clock. Getting jerky shifting, the trans indicator's lit up, and it sometimes refuses to shift properly, even dropping into limp mode. Could low voltage be causing this?

Summary of the thread

A 2008 Citroen C1 diesel with 75,000 km is experiencing issues with its automatic gearbox, including jerky shifting, a lit transmission indicator, and occasionally entering limp mode. The problem was suspected to be related to low voltage. After a diagnostic, it was found that worn-out transmission oil was causing the undervoltage issue, and replacing the oil resolved the problem.

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4 comment(s)

martinstorm6

That sounds familiar! I've a C1 and had similar weirdness with the automatic transmission. Was yours also throwing up transmission error codes, refusing to shift sometimes? Any other electrical gremlins going on?

manfredlang1 (community.author)

Exactly! Error codes galore. Electrical gremlins... hmmm, not that I've noticed, but where was yours dodgy? Same symptoms? Did you manage to get it sorted, or am I looking at a garage job?

martinstorm6

Yep, same symptoms – the codes were related to the transmission's hydraulic fluid pressure. I'm no mechanic, so I took it straight to a workshop after some research. Probably worth getting it checked out professionally to avoid making things worse. Good luck!

manfredlang1 (community.author)

Booked it in for a diagnostic. Turned out the auto transmission oil was worn out and causing the undervoltage issue! Oil replacement sorted everything, cost me 240€. Should have done it sooner!

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CITROEN

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C1