Please help me!!! Need advice.

Asked by Mar 10, 2017 at 02:44 PM about the 2006 Cadillac STS V8

Question type: Maintenance & Repair

My car is running so terrible.
It sounds like a truck. This
just happened out of
nowhere. Prior to this my
check engine light had been
on but went off. Then its
now back on and has stayed
on. I had auto zone scan my
car and the codes below in
the pic are what came up.
My question is how serious
are these? What do they
mean? And should I stop
driving until I get to Garage?

2 Answers

250,815

I would attack the P0171 and P0174 first. Those a classic lean codes associated to an air leak after the MAF. Check your intake boots for rips or tears. You can also perform a smoke test to find the leak. The lean codes might trigger the other codes to appear as well. Rescan for the codes and then think about replacing the spark plugs first and see if the P0306 goes away. If not, then it might be the coil on that cylinder. You need to start with one possibility first and go down the list. Doesn't always mean to replace a sensor.

1 of 1 people found this helpful.

Thank you! I don't know anything at all about cars and how to fix them. I'll take it to a shop.

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