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CEL constantly coming on

Re: CEL constantly coming on

Postby nealinator » Dec 30 2020, 5:17pm

Just a reset, no updated software?
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Re: CEL constantly coming on

Postby 660catman [OP] » Dec 30 2020, 5:26pm

I asked about that. He knew nothing about that but he was a young guy. He said they have customers come in every six months to get it reset. This is a small town dealer so if it happens again, I’ll try another dealer. I still have two permanent codes. P015B and P015D. I have read they go away if all is good with those two O2 sensors and drive it for a while. All four were changed last year.


2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock
2013 Silverado 1500 Z71 CC 5.3 4WD 3:42's and all stock
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Re: CEL constantly coming on

Postby SierraHarley » Dec 30 2020, 7:42pm

Glad my truck's 5.3 didn't come with the flex fuel option.
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Re: CEL constantly coming on

Postby 660catman [OP] » Apr 02 2021, 8:13pm

Well now I’m pissed!! CEL came on again on at around 300 miles on an 800 mile round trip.
Alcohol percentage is back up to 67.8
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2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock
2013 Silverado 1500 Z71 CC 5.3 4WD 3:42's and all stock
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Re: CEL constantly coming on

Postby 660catman [OP] » Apr 08 2021, 12:38am

Truck was back at dealer today for the reset of fuel trims and alcohol. Alcohol was up to 78.4% today and started like crap. Hopefully I get more than 7000 kilometres out of this reset.
No vacuum leaks, broken exhaust studs and dealer cleaned MAF sensor.


2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock
2013 Silverado 1500 Z71 CC 5.3 4WD 3:42's and all stock
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Re: CEL constantly coming on

Postby badbruin44 » Apr 08 2021, 3:34am

I would dig into the fuel trims. The LTFT looked way out of spec at -30 some posts ago.
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Re: CEL constantly coming on

Postby tahoe_08 » Apr 10 2021, 11:12pm

nealinator wrote:No problem. Mine never had a CEL but was just hard to start when the engine was cold. You may still need to look into cleaning the MAF and or check for an intake leak. Guess you can wait until after the update the firmware and clear out the data to see if it comes back on.

you mean he should look for a restriction in the intake system example: air filter, leaky fuel inject(s)(i.e dirty and staying stuck open) dirty alcohol sensor... (the sensor might also be faulty ) i suggest trying a cleaner in a can.. also try another fuel station(maybe they put E85 in the normal E10 tank)

LUCAS fuel injector cleaner did the trick for my clogged injectors so it is known as something that works


..
if it was running lean the % would be positive


negative means it's deducting fuel too much fuel , running rich.

positive means it's adding fuel i.e too much air


i know it's confusing at first..


660catman wrote:I asked about that. He knew nothing about that but he was a young guy. He said they have customers come in every six months to get it reset. This is a small town dealer so if it happens again, I’ll try another dealer. I still have two permanent codes. P015B and P015D. I have read they go away if all is good with those two O2 sensors and drive it for a while. All four were changed last year.


2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock

maybe someone put E85 in the E10 tank try filling up else where I would also do one of those test kits to check to see if it's E10 fuel
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Re: CEL constantly coming on

Postby 660catman [OP] » Apr 11 2021, 1:34am

tahoe_08 wrote:
nealinator wrote:[quote="660catman"]I asked about that. He knew nothing about that but he was a young guy. He said they have customers come in every six months to get it reset. This is a small town dealer so if it happens again, I’ll try another dealer. I still have two permanent codes. P015B and P015D. I have read they go away if all is good with those two O2 sensors and drive it for a while. All four were changed last year.


2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock

maybe someone put E85 in the E10 tank try filling up else where I would also do one of those test kits to check to see if it's E10 fuel


There’s not an E85 station anywhere in Canada near me.


2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock
2013 Silverado 1500 Z71 CC 5.3 4WD 3:42's and all stock
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Re: CEL constantly coming on

Postby tahoe_08 » Apr 11 2021, 8:12am

660catman wrote:There’s not an E85 station anywhere in Canada near me.


2013 Silverado LT CC 1500 Z71 5.3 4WD 3:42’s all stock


it does not even matter they could have shipped it with the wrong fuel it happens more often then you think
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