I just got myself an '05 G35 sedan. 51,00 miles and meticulously maintained, it's awesome. I just got back from a road trip to San Diego (apprx 900 miles roundtrip), it drove beautifully and got 25 mpg which I was pretty happy about. Nothing quirky yet except the "service engine soon" light just came on. The manual says it's either the gas cap or something within the emissions control system. Blogs I've looked at also mentioned the gas cap but also brought up sensors and such.

I've checked the gas cap. Should I go and get the code checked? Any others had the same experience?

Thanks
Carl in Tucson

 

Yeah pull the code and get a more accurate reading

 

Like jerseytaylor said pull the codes to be on the safe side.If you take cap off and replace. light should go out in couple if cap wasnt on right.I also have a 05 and love it! Great cars!

 

The code was U1000, that indicates a bad ground. I started by cleaning my negative battery terminal. The Service Engine soon light is out and hasn't come back on after several trips around town. Hopefully that was it.

CM

 

Thats was a easy fix! Its good she is running good and no service engine light on.You have nice very low mileage G!