Hey I have a 2006 Civic SI and the check engine light came on which it running lean(P0171)...What can I do to fix this issue?

 

Step 1: Check FAQs
Step 2: If FAQs didn't answer your question, there's always Google, which can lead you to other forums if Honda-Tech hasn't already covered this topic, which it has.

I don't know jack about codes, and just by searching p0171 on Google I've gotten numerous results. Since I don't have that problem, I will not read all of the threads. But here, I'm sure you can read too.



https://honda-tech.com/tags.php?tag=p0171&page=2

 

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A code P0171 may mean that one or more of the following has happened:

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions
Possible solutions include:

In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect all vacuum and PCV hoses, replace if necessary
Check for a dirty fuel filter and proper fuel pressure

 

do you have an intake?

after-market intakes can make your car run lean.

 

yea it does....

 

I have never seen this happen before...