400 - DPM/Traction Control warning light

Mine has developed an intermittent fault, definitely related to the brake light switch. I can activate the DPM fault light by pressing the brake pedal, although not every time. Alarm clears every time after restarting the engine. Looking at FAQs, this seems to be a very common fault and if I'm lucky might be fixed by just a recalibration of the switch. Until I get it fixed, is traction control completely disabled when the warning light is on? Did Lotus make any changes to the switch over the life of the Evora or are all model years susceptible to this problem?