C6 ABS Fault

My 2010 Citroen C6, gasoline engine, is throwing a speed signal fault. The ABS lamp is on, traction control is failing, and the ABS system is offline. Speedometer and odometer are also dead. Suspecting a sensor, but could it be a control unit issue? Anyone else seen this?

4 comment(s)

I had similar symptoms with my Citroen C6. Have you checked the ABS sensor connections for corrosion or damage? Any other electrical issues?

Sensor connections look clean, but I'm wondering if it's deeper than that. Did your C6 throw any other codes or act up in any other way when you had your issue? Was it a faulty sensor, or something more?

In my case, the diagnostic pointed towards an internal fault within the ABS control unit. Given your symptoms, a defective control unit could be the cause. A workshop visit would allow thorough diagnosis.

I appreciate the insight. Sounds like a potentially expensive trip to the workshop. I'll post the diagnosis and repair cost. If it's the control unit as you suspect, I'm looking at around 1000€ to fix!

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