Three problems related to brake light on have been reported for the 2003 Toyota Prius. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota Prius based on all problems reported for the 2003 Prius.
Abs brake light came on then went off. I brought car to mechanic who checked brakes. There was no problem with the brakes. Then I heard a high pitched alarm sounding noise while the abs brake light warning was on, then both would turn off then on then off. . . . . There is no rhyme or reason to what is causing this trouble. When I checked the internet, other Prius owners complained about this as well. Some of those people have spent thousands of dollars to fix the problem and after all the "codes" had been fixed, the alarm sounded yet again. There should be a recall notice for this problem.
Abs brake light comes on and beeps, and brakes become squishy on my 2003 Toyota Prius. Toyota dealer does not know what the problem is. I have spent hundreds of dollars on diagnostics, but the problem keeps happening. I have noticed similar complaints on the internet regarding this abs light problem, and squishy brake problem. Toyota dealer informs me that they have heard nothing of this problem from the Toyota motor corporation.
2203 Toyota Prius cst brake light goes on intermittently had brakes replaced by dealer. Brakes did not feel ok but told this was normal. Brake pedal went to floor intermittently but no brake light came on. After car slid thru red light at intersection, car was brought back to dealer. Replaced master cylinder. Brakes still did not work. Dealer said brake hoses were soft & swollen and brake controller sticking. Replaced brake hoses, flushed lines cap. Bleeder plug actuator assy. Car has 67,000 miles.