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Ron, ASE Certified Technician
Category: Kia
Satisfied Customers: 35823
Experience:  35 years as an automotive tech
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Kia: p0171 and 174 lower intake was leaking replaced gaskets.

Customer Question

p0171 and 174 lower intake was leaking replaced gaskets. reset fuel adaptives same codes back again cheked fuel pressure 50 psi.had on scanner saw short term fuel trims intermittently add 14/15 percent then back down to negative 2/3
Submitted: 2 years ago.
Category: Kia
Expert:  Ron replied 2 years ago.
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
In order to help you with the lean codes you are getting on your kia I need to know what year you are working on.Post back with this and we can work from thre to get this resolved.
Customer: replied 2 years ago.
Hi ron 2010 kia sportage
Expert:  Ron replied 2 years ago.
If you are sure you have no further vacuum leaks I would try disconnecting the negative battery cable and then take some MAF cleaner and give the MAF a good cleaning. Usually if the fuel trim readings are is only lean at idle, its usually caused by a vacuum leak. If there only lean at highway speed, the mass air flow sensor may be the problem.
Customer: replied 2 years ago.
(###) ###-#### *****
Expert:  Ron replied 2 years ago.
Unfortunately I am not able to take a phone call at present but will help you anyway I can other wise.
Customer: replied 2 years ago.
Already cleaned mass air flow sensor
Expert:  Ron replied 2 years ago.
Okay then I would go back and double check for any sources of a vacuum leak, both of these codes are usually set due to a vacuum leak providing your MAF is working properly. Usually if its not then you would be getting P0102 fault code.