Check Engine Light

markgutZ · 06-20-2017, 08:38 AM

Hello guys,

I was driving the z one day and cel light comes on. The car is completely stock and no mods at all and this light came out.. can u guys tell me what part do i need to replace? Thanks

https://goo.gl/photos/Pyg7LruNkK9J9PFF6

nandosman · 06-20-2017, 08:54 AM

https://www.yourmechanic.com/article...-jerry-renshaw

Nixin · 06-20-2017, 09:03 AM

Start with tightening your gas cap.

3.7 ZPA · 06-20-2017, 08:57 PM

There are a ton of threads on this code, if you just perform a search. I know this, because my car has been throwing it for two years. After replacing the o2 sensors, cleaning the MAF sensors, and checking for leaks at the intakes, it's still there. I have cleared it many times, and it always returns about a hundred miles later.

I am going to take it to a shop to check for leaks in the exhaust. I have yet to see a definitive fix for this.

markesc · 06-21-2017, 04:11 AM

Isn't a contributing factor the stock cat/exhaust design?

I only mention this as it seems like fast intentions recesses the 02 slightly to avoid this problem as mentioned in their high flow res cats:

"J-Bend style O2 sensor anti fouler to keep that pesky CEL (Check Engine Light) off. Note: In rare instances, model year 2013 and above, may trip a CEL (Check Engine Light)"

370Z Resonated High Flow Cats, Fast Intentions

.....

Or it could just be it's a '09 / higher miles and they're toasted after racing those notoriously fast Subaru Outbacks to the nearest starbucks?

jonjiang · 06-27-2017, 11:25 AM

I just got this code resolved after a long time. My mechanic found a crack in my catalytic convertor. Once welded up, the code went away. He explained that the code is triggered when there is a mismatch between the O2 sensors. Since the crack let in fresh air into one side, there was a mismatch and the code was triggered. So, check the cat for cracks, especially around the connection points or hangars. Good luck.

felix0121 · 06-27-2017, 08:43 PM

Today I had been to the dealership for 'service engine soon' light on, and it became okay after they cleaned the throttle body.

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06-20-2017, 08:38 AM	#1 (permalink)
markgutZ Base Member Join Date: Nov 2016 Location: Gaithersburg, MD Posts: 44 Drives: 2009 370 370z 6MT Rep Power: 9	Check Engine Light Hello guys, I was driving the z one day and cel light comes on. The car is completely stock and no mods at all and this light came out.. can u guys tell me what part do i need to replace? Thanks https://goo.gl/photos/Pyg7LruNkK9J9PFF6

06-20-2017, 09:03 AM	#3 (permalink)
Nixin A True Z Fanatic Join Date: Sep 2015 Location: GWN Posts: 3,488 Drives: Goodbye Z! Rep Power: 19833	Start with tightening your gas cap. wanker likes this.

06-20-2017, 08:57 PM	#4 (permalink)
3.7 ZPA Enthusiast Member Join Date: Sep 2012 Location: Connecticut Posts: 352 Drives: '09 370Z 6MT Rep Power: 13	There are a ton of threads on this code, if you just perform a search. I know this, because my car has been throwing it for two years. After replacing the o2 sensors, cleaning the MAF sensors, and checking for leaks at the intakes, it's still there. I have cleared it many times, and it always returns about a hundred miles later. I am going to take it to a shop to check for leaks in the exhaust. I have yet to see a definitive fix for this. __________________ 2009 6MT Touring Sport Z1///Tanabe///ZSpeed///EVO-R///Michelin

06-27-2017, 11:25 AM	#6 (permalink)
jonjiang Base Member Join Date: May 2009 Location: NorCal Posts: 17 Drives: 09 370z Black M6 Rep Power: 16	I just got this code resolved after a long time. My mechanic found a crack in my catalytic convertor. Once welded up, the code went away. He explained that the code is triggered when there is a mismatch between the O2 sensors. Since the crack let in fresh air into one side, there was a mismatch and the code was triggered. So, check the cat for cracks, especially around the connection points or hangars. Good luck. SouthArk370Z likes this.

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06-20-2017, 08:54 AM	#2 (permalink)
nandosman Enthusiast Member Join Date: Mar 2017 Location: IL, US Posts: 344 Drives: 2014 370Z T/S Rep Power: 8	https://www.yourmechanic.com/article...-jerry-renshaw

06-21-2017, 04:11 AM	#5 (permalink)
markesc Enthusiast Member Join Date: Apr 2014 Location: Utah Posts: 380 Drives: 2014 370z M.B. 7AT Rep Power: 3366	Isn't a contributing factor the stock cat/exhaust design? I only mention this as it seems like fast intentions recesses the 02 slightly to avoid this problem as mentioned in their high flow res cats: "J-Bend style O2 sensor anti fouler to keep that pesky CEL (Check Engine Light) off. Note: In rare instances, model year 2013 and above, may trip a CEL (Check Engine Light)" 370Z Resonated High Flow Cats, Fast Intentions ..... Or it could just be it's a '09 / higher miles and they're toasted after racing those notoriously fast Subaru Outbacks to the nearest starbucks?

06-27-2017, 08:43 PM	#7 (permalink)
felix0121 Enthusiast Member Join Date: May 2012 Location: California Posts: 477 Drives: 2010 370Z Sport 7AT Rep Power: 67	Today I had been to the dealership for 'service engine soon' light on, and it became okay after they cleaned the throttle body. Sent from my SM-G930V using Tapatalk