2024 Mazda CX-5 – P0171 Code Came Back After Clearing

[hrag007]

Hey all,
I have a 2024 Mazda CX-5 (leased). Last week I accidentally forgot to put the gas cap back on after fueling. Shortly after, the check engine light came on. I scanned it with an OBD2 scanner, got a code, and cleared it.

Now the light is back again, but this time I'm getting:

P0171: Powertrain control module PCM


No EVAP code showed up, which is what I’d expect from a gas cap issue. I did reset it again, but the P0171 came back. Car runs fine, no noticeable performance issues.

Do you think this is still related to the gas cap or more likely a vacuum leak / MAF sensor problem? Would this be covered under warranty since it’s a lease?

Any help or shared experiences would be appreciated. Thanks!

 

[paris1]

Of course it’s covered by warranty; the car’s less than a year old!

 

[HyFlyer]

A 2024 would still be warranty (unless you're over 60,000 miles). Let Mazda figure it out. Doesn't matter if it's a lease or purchase.

You can take a look under the hood to check simple stuff like a noticable loose connector or air filter box lid etc. Have you had any service work recently? I recall a member recently having dealer maintenance and they "forgot" to put an air filter in it .

 

[hrag007]

A 2024 would still be warranty (unless you're over 60,000 miles). Let Mazda figure it out. Doesn't matter if it's a lease or purchase.

You take a look under the hood to check simple stuff like a noticable loos connector or air filter box lid etc. Have you had any service work recently? I recall a member recently having dealer maintenance and they "forgot" to put an air filter in it .

Yes i did have an oil change... however, i saw the check engine light before the service ... i used obd2 scanner to turn it off ... so the light came on after when i filled the gas last week and closed the cover without closing the gas cap and i saw online it could cause check engine light to pop. However, after clearing it, it came back again in a day... so i am afraid if the issue got bigger ...i talked to the dealer they said come Monday to check.