check engine light

[nuwde]

This recently came up. I didn't change anything or do anything and it just popped up. I already replaced my o2 sensor. What else could it be? Thanks!

Edwin

[shogun]

Check your voltage at both battery and alternator, these cars are very sensitive to any deviation from the norm in the way of voltage. I would expect to see a static battery voltage of about 12 VDC or more and a running alternator voltage of 13.5 VDC or better.

If the battery and charging voltage is too low, the CPU likes to go crazy.