What’s wrong with my car

Asked by GuruSNCHF Jun 04, 2019 at 10:17 AM about the 2013 Buick Verano

Question type: Maintenance & Repair

My check engine light came on few days ago n
auto zone said O2 sensor.
But now My car shuts off when driving, I turn it
back on it starts up but it hesitates to drive. I
looked under the hood n it looks like there is oil on
the  alternator. What could it be?

2 Answers

89,685

If the computer threw a code for the O2 sensor, it could be a defective or dirty sensor or something in the system, like an electrical short. If there's oil on the alternator, first, determine what type of oil, e.g., engine oil. If it is engine oil, you could have a leak that's hitting the fan and acting like a spray. Or it could be a stuck PCV valve adding oil to the intake and spraying from there. Have a mechanic diagnose this.

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