August 22, 2012 at 6:13 am #38320
I have a 2009 Yukon Denali 6.2L. A few days ago it started to rough start in the morning when it was cold. The engine RPM would go from 0 to 1000 RPM and skip and sputter or even stall . After it started it ran great. SIS light came on. I had GMC dealer service look at it .
They got Code PIP4693D: Intermittent SES light on cold start due to DTC P1400 – Due to Low Fuel Volatility.
Was told to switch brand of fuel and switch to 87 octain. I have been using premium because I get better gas mileage with premium ,especially when towing. Has anyone else had this problem? I do not like the answer. I do not want to get spark knock that 87 octain gas could give me when towing.
August 22, 2012 at 10:58 am #40510
Hey C6RAPTOR, I just found this site and I hope this helps: http://www.cargurus.com/Cars/Discussion-t38450_ds499762
August 22, 2012 at 11:53 am #40511
and also maybe look at the brand of the oil too!
August 23, 2012 at 5:01 pm #40519
Doesn’t sound right. Last time I checked, P14XX codes were manufacturer-specific EVAP codes.
August 24, 2012 at 4:23 am #40521
The dealer gave me Document ID: 2519009 # PIP4693D for DTC P1400- Due To Low Fuel Volatility.
Condition : Cold rough running/SES light when cold starting
Recommendation: change fuel brand or switch to 87octane.
It notes that: Slight spark knock may be noticed with 87 octane. This is not a good answer from GM.
It also notes that this PI superseded to include results of the previously mentioned investigation Please discard PIP4693C
August 24, 2012 at 1:01 pm #40523
So what are they going to have you do or what are they going to do?
August 24, 2012 at 2:56 pm #40526
I will change fuel brand first before I go to 87 octane. Like I said I did not like the fix. It sound like GM screwed up the works with this Flexfuel engine that should run n high test but does not want to start with high test. Maybe that was the idea for calling it FlexFuel. Start on 87 octane and then run on high test. I need to think about how to do that.
I was dumbfounded when the service tech said i needed to change fuel brand or go to 87 octane. The GMC has over 22K on it burning mostly high test of the same brand.
August 24, 2012 at 3:18 pm #40527
It would be good to see the 74 other times you got that code deleted.
August 26, 2012 at 7:13 am #40534
Please explain your comment.
August 26, 2012 at 12:26 pm #40536
I’ll let the person that deleted double, triple, quadruple post explain. I guess you didn’t see it.
Someone did … besides me.
August 26, 2012 at 12:55 pm #40537
August 26, 2012 at 4:34 pm #40539
OMG Alex …………….. I wudda neber guest
August 27, 2012 at 5:11 am #40540
thanks, my mistake. The Post did not seem to take the first 74 times i clicked.
August 27, 2012 at 12:30 pm #40541
August 27, 2012 at 3:47 pm #40543
August 27, 2012 at 10:46 pm #40544
wait but then what about that one subject that started with 2012 Traverse No bluetooth, that one has already 2
August 27, 2012 at 11:33 pm #40545
September 2, 2012 at 11:49 am #40561
Were you using Shell gas by chance? On another forum in section dedicated to 6.2L engines several owners were having cold start problems. Turns out once they shifted away from Shell premium to another brand, no more problem. I don’t have any problems with Shell in my 6.2L Sierra Denali but then gasoline is not the same in all parts of the country.
September 3, 2012 at 8:12 am #40562
What forum had the section dedicated to 6.2L
August 6, 2016 at 5:39 pm #135382
I got the same code. Along with 0171,1400, p0300 0301 p0306 p0599 2006 4.8.
Frustrating and it all started with an air filter replacement and fuel injector additive. A week before it ran better than when I bought it new.
August 6, 2016 at 10:54 pm #135394
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