My Nissan Nv200 2012 right hand drive has this issue when ever i am driving then switch on the park light so as to illuminate the dashboard i immediately lose pedal power.Switch it off and vehicle picks up rev immediately again switch lights on again Throttle position drops and holds at 21% rev just up to 3000rpm no more. Scratch my head auto electrician can't seem to figure it out at all help?
Looks like you car has a throttle pedal sensor.
My guess would be that you have a bad earth connection somewhere, so that the sensor is having to find its earth through the lighting circuit.
I would check the resistance of the ground connection at the throttle pedal as a start.