i have s300 on a p28 and the red light is flashing and wont let my car rev past 4k, idles fine! any help on wat this could b! car was running good the day befor! motor is b20vtec!

 

limp home mode possibly ...any CEL's? Have you recently swapped your injectors to low impedance injectors without adding a resistor box? You have to give more information because either you recently changed something or god just hates you