Well I got a 2007 2.4 lt
So I clean my maf with Crc and clean the throttle body so after that my t/c light comes on then got the code p0171 which I know that the rubber hose connects to the air box the clamp is broken and I got to use a zip tie for now to fix it .. but with t/c light on the transmission shift at low speed like I got a shift kit .. so I’m wondering when I cleaned the maf maybe it was still wet when I started the car and maybe shorted ? It also idle not to good like it’s missing a little at low idol .. the car starts right up but idol is a little shaky .. any input

 

Could be the MAF was not fully dried off.
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 cracked vacuum or PCV line/connection Faulty or stuck open PCV valve Failed or faulty oxygen sensor (bank 1, sensor 1) Sticking/plugged or failed fuel injector Low fuel pressure (possible plugged/dirty fuel filter!) Exhaust leak between engine and first oxygen sensor
A lot of times, cleaning the MAF sensor and finding/fixing vacuum leaks fix the problem. If you're on a tight budget, start there, but that may not be the fix for certain. So, possible solutions include: Clean the MAF sensor. 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/repair as required Inspect all hoses and connections in the air intake system Inspect and/or test the intake manifold gaskets for leakage Check for a dirty fuel filter and proper fuel pressure Ideally you'll want to monitor short and long term fuel trims using an advanced scan tool If you have access, you may want to run a smoke test

Read more at: https://www.obd-codes.com/p0171
Copyright OBD-Codes.com

 

ok one thing I did was changed the oil and filter .. I was using simi synthetic oil and switch it over to full synthetic Castrol magnetic 5/30 with is dexos 2 ..any problem with that ?

 

No, that shouldn’t be a problem.

 

Another case of not plugging the MAF back in ?
Or, plugged it back in but bent or damaged the connectors ?

 

Very possible, FMG , very possible. I’ve seen the MAF even installed in the wrong direction so the air flow went the wrong direction over the sensor wire port.

 

Ok I’m going to replug up the maf sensor but you should here snap in right ? Mine won’t snap in but it’s in then I would try a little tug but it won’t come off .. seems like it tight on it .. thanks for guys comments .. just one will it cause the traction control light to come on if this is the reason ?

 

update well I unplugged the maf and took it out and it only goes in one way because the screws won’t line up right the other way .. so I had to zip tie the air horn at the top and start her up no check engine light no traction control light drove it for twenty minutes and the only thing it idles funny when stop .. other then that were do you get that hose clamp at ? Here are some pics

 

Send hellshotrod a PM , tell him the parts you need and a new to you MAF sensor. Try a new underhood EVAP purge valve to.