Citan engine fault after chip tuning

I had something similar happen with my Citan. Reduced engine power, error code popping up. I did a car diagnostic myself with a scan tool, and it was pointing to something weird with the engine management. Was yours tuned before?

That's exactly what's happening to me! Engine management sounds right. Any idea what the fix was, or did you just end up taking it to a shop? How did you confirm that chip tuning was the problem, my scan tool doesn't confirm it?

I'm no mechanic, but I'd say it's the chip tuning. Mine was the same after some aftermarket modifications. I just took it straight to a workshop in the end, they sorted it out. Best not to mess with it yourself, could do more damage.

Right, workshop it is. Thanks for the heads up. I took your advice and went to the workshop. Turns out the chip tuning was indeed the culprit. They reverted it to the original settings, ran another vehicle diagnostics to clear the fault code, and now it's running smoothly again. Bill came to 180€. I appreciate the help!