the pulsation occurs when applying brakes to stop and the check engine light is on or it blinks on and off.
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2003 Mazda Mazda6 Question: why would my breaks pulsate and my check engine light come on.
Answer #1milesauto from Miles Auto Service Inc., January 31, 2013, 13:20Master
Sounds like 2 differant problems...pulsating when applying brakes typicaly means you have warped brake rotor disc and a flashing check engine light typicaly means the computer is detecting a miss fire in engine...that could damage catalytic converter if it not repaired.
Answer #2csubak30 January 31, 2013, 20:57Master
Agree with #1. Get the engine code read for free at a parts store and post the code here.