Hey guys. I just serviced my engine three days ago and yesterday the service engine soon light came on Any insights...(and it's not the gas cap)

 

HI G-fan, welcome to G35Driver......sorry for your issues. , let's hope they're resoved soon.

You've not given much info, but it may be that the recent "service" you did or had done may have something to do with the CEL.
If it was an oil change you had done, is the level ok now, or......?
If it was an air filter replacement, is the MAF sensor reconnected.....?
Spark plugs...........?
A Sensor replacement?
A displaced serpentine belt?

any of these may trigger a CEL....so check for something obvious b4 having the dealer look at it.
If the culprit isn't obvious, the easiest way to narrow it down is with an ECU scan which the dealer can do in minutes.

G/L with an early diagnosis and remedy.....
..and we look forward to hearing from you soon.

Colin.

 

Colin, I have to hand it to you bro. You're so nice and know your stuff too. From now on...you are DR. G...

 

I agree with Chico Colin.

The MAF is often a good bet. In many vehicles they are overly sensitive. Sometimes just disconnecting the battery resolves the non problem by resetting the ECU.

 

Thanks Colin! You are really helpful and knowledgeable. It turned out it was a non problem cause I disconnected and reconnected the battery as 'RBULL' suggested and now that the ECU is reset the light is gone (thanks 'RBULL').

...and I agree with Chico, you are Dr. G!

 

Well done boys......I forgot the obvious one: 'battery disconnect' or 'pedal method' ECU reset....
----
G-fan, glad it worked out for you. There are many here with a wealth of experience and knowledge who are pleased to share with brother G's.

C.

 

Educate me bro...what's the pedal method ECU reset???

 

Hey, glad to help. If it returns it's time to see your dealer friend.

 

Sorry man, missed your post back.... A reset can be effected by 2 methods: 1/ by disconnecting the negative terminal of the battery for 12 hrs. ...... (it's debateable as to whether it's effective with a shorter time period).......

2/ by using the 'pedal method' ..... All info is in our DIY/FAQ forum under the heading of "ECU RESETS".
here's the link.....

https://g35driver.com/forums/showthr...3717#post63717.....

scroll down to Merlin's post for precedure on the basic pedal method.
As it explains, it may take some practice since timing is everything with this method, but it is absolutely do-able and one I use myself.

Colin

 

Damn it! I wish I knew this before cause I would much prefer to test my skills with this method. Ahhh well, I'm sure I'll have to reset the ECU at some point again.

Thanks Colin.

 

No worries.....from what I understand, doing a reset isn't detrimental in any way, so doing another reset won't upset anything.
Go ahead and test your skills. It may require a few tries b4 mastering. Remember to wait at least 10 seconds b4 re-attempting tho.

I like the pedal method because it means not losing odometer readings, radio presets, and certain navi displays.

Let me know how you do.

Colin

 

Got it! Took a few tries but I got it!

 

That's cool man....Once you get the timing it's easy, and this method is more convenient.....

Enjoy
C.

 

What exactly is the gas cap issue? And how does the MAF get disconnected when changing an air filter?

 

Hi bro, The gas cap issue is the most common cause for tripping the CEL. Apparantly the closed fuel system won't work too well with the cap off so it trips the light as a reminder to cap it again.

The MAF connection can be disconnected to facillitate changing the engine air filter.
If the engine is restarted while it's disconnected, it'll trip the CEL.

Both situations necessitate a simple ECU reset.

C.