couple faults on a forester

[T2urtle]

My uncle came by the other day with his car because all the lights are blinking like Christmas trees.

2009 Subaru Forester, its the NON-turbo model. 70-80k. Never had any work other then oil changes.

P0457_ Evap, small leak - gap cap
P0102 MAF low input
P0113 IAT high input

Now he told me car runs good never had issues. I cleared his faults and told him to come back on the weekend when i have time to look. My thoughts are the evap is last, most likely purge valves gone bad. But i'm more concerned with the MAF and IAT.

Dont they kinda go off each other, amount of air and temp of the air flowing. So maybe they go hand in hand. First thing is first, must make sure connections to intake is all good and nothing broken, cracked or missing. After that i think MAF can be ohm-ed/voltaged out to a spec same with IAT. Rockauto has MAF drop-in's for about $80. I wanted to look into that first because that would cause the biggest driving issue.

Google shows a lot of people having p0102/p0113 after turbo installs and forgetting to plug stuff in.

 

[mvbighead]

I assume on this:
P0457_ Evap, small leak - gap cap

You meant this:
P0457_ Evap, small leak - gas cap

On the Evap systems, one of the first things to check is the gas cap. If it isn't sealing correctly, your evap system will have a small leak as the error indicates. Just a quick simple check before buying an evap solenoid.

 

[T2urtle]

yes, i always check the gas cap. I normally remove, wipe the edge with a rag and make sure everything is clean and reinstall. I've done 5 cars now that had a evap leaking fault and none needed a gas cap. 3 needed evap purge valves by/on the canister in the back, 1 needed a valve that was mounted to engine block and the last one needed a canister because it was physically showing cracking and leaks at the O-rings.

You still always need to check them, i agree because its cheap and easy to replace.