- May 31, 2003
It sounded exactly like the sound clips in the first post of Booster Pump / Accumulator Noise diagnosis. My alternator sounded like that too when it died, but it was louder. I tried to record sound clip today, but it only made that sound for a short time at the beginning. I have C1256 code, intermittent ABS & BRAKE lights and BEEP. There is no loud alert or any kind of alarm. Brake pressure is still good. I pumped the brake pedal at least 50 times today and I couldn't get the brake to fail. With a lot of open space in front of me, I shifted the transmission to "D" when I had ABS & BRAKE lights and BEEP, continued to step on the brake pedal, and gave it a lot of gas, the vehicle didn't move at all.Can you describe the noise you're experiencing?