Brake system warning light

[rhosneigr]

After trying the hill start assist system to se if it worked, which id did, I am now left with the yellow brake system warning light being permamently on. According to the hand book this indicates a malfunction in the regenerative braking system or thee electronically controlled brake system. Given that this happened after using the hill start assist I assume that that this has cause the malfunction. Ihave tried using the hill start system again ahile the car is on a flat drive but it does not activate. Any ideas as to what the cause might be would be appreciated. 

[rhosneigr]

Sorted. It was the Tyre pressure monitor light although l have owned the car for eight years I didn't know it was fitted on the car. Have obviously kept good tyre pressures for eight years. Checked pressures and one wheel was down from 32 to 29. I spoke to a Lexus service centre about it and they thought that the spell of cold weather was probably the cause and apparently they have come across drivers mistaking this with the brake warning light. They are very alike and next to each other. If I had done a better search of the manual its all in there. 

[Malc1]

Everything has clearly been fine at the MOTs and presumably over 8 years and tyre changes all has been well 

Well done and maybe quite lucky 😄

Malc