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SES light came on yesterday. I assume I have a vacuum leak somewhere with P0174. P0300 I think is just a cause of the system running lean. However, I noticed a black chalky/carbon spot behind my exhaust now. This is all new. The thing ran great when I had an alignment done on Friday which was the last time it was on the road. Any ideas what could be wrong.
SES light came on yesterday. I assume I have a vacuum leak somewhere with P0174. P0300 I think is just a cause of the system running lean. However, I noticed a black chalky/carbon spot behind my exhaust now. This is all new. The thing ran great when I had an alignment done on Friday which was the last time it was on the road. Any ideas what could be wrong.
Please study lined info below carefully and then ask any questions that you might have about it. You will need a capable scanner to do anything, so tell us what you have.
P0174 and P0300
