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Autodata Technical Issue 5 - Abnormal Noise from Exhaust in Citroen C1

Autodata Technical Issue 5 - Abnormal Noise from Exhaust in Citroen C1

31 May 2017

Each month the Autodata team answers a common technical question and provides a printable document with technical diagrams to download and keep, exclusively for IGA members.

Issue 5 investigates an abnormal noise from a Citroen C1’s exhaust that can’t be found.

Q. A customer is complaining that their 2005 Citroen C1 1,0 is making an abnormal noise from the exhaust when accelerating. We have heard a noise once but haven’t been able to pinpoint which section of the exhaust it is coming from. Can you help?

A. The C1 from the start of production up to 05/01/06 demonstrated the symptoms you describe. The abnormal noise is due to loose baffle plates in the rear exhaust silencer resonating between 1500-2000rpm.

Check the rear exhaust silencer for 6 spot welds (Fig 1.1). If the spot welds are not present, fit a new rear exhaust silencer. Road test the vehicle to confirm the fault is no longer present.

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