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CEL constantly coming on

Re: CEL constantly coming on

Postby nealinator » Oct 23 2020, 9:48pm

Fuel trims are off...but that is typical with the ethanol % mis-calc issue. I had the dealer upload the latest ECM software and then reset everything. No issue since.
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Re: CEL constantly coming on

Postby 660catman [OP] » Oct 23 2020, 10:09pm

nealinator wrote:Fuel trims are off...but that is typical with the ethanol % mis-calc issue. I had the dealer upload the latest ECM software and then reset everything. No issue since.
Thanks for your help. I guess it’s a trip to the dealer for 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 nealinator » Oct 24 2020, 1:54am

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.
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Nealinator's 5.3L 4x4 Z71 All Terrain192,029 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
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nealinator
Shifting into Sixth Gear! [L3]
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Re: CEL constantly coming on

Postby 660catman [OP] » Oct 29 2020, 9:32pm

Haven’t been able to get to dealer but filled up again with ethanol free 91 and alcohol % dropped to 29. Still had CEL come on with the P0175 code. MAF was showing 6.9 g/s.


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
Original Poster
660catman
Combustion on 5 pistons [L2]
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Re: CEL constantly coming on

Postby 660catman [OP] » Nov 22 2020, 11:35pm

Now I know I’ll probably jinx myself. I’m on my third tank on non ethanol fuel with multiple starts and CEL has not come on. Next tank I’m going back to regular E10 and see what happens.


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
Original Poster
660catman
Combustion on 5 pistons [L2]
Combustion on 5 pistons [L2]
Posts: 574
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Joined: Dec 13 2017, 12:27pm
Years of membership: 3 years of membership3 years of membership3 years of membership
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Re: CEL constantly coming on

Postby nealinator » Nov 23 2020, 12:07am

What is your alcohol % reading?
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Nealinator's 5.3L 4x4 Z71 All Terrain192,029 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
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nealinator
Shifting into Sixth Gear! [L3]
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Posts: 15805
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Re: CEL constantly coming on

Postby 660catman [OP] » Nov 23 2020, 12:25am

It was at 29.1 when I checked a week ago. We are in a lockdown for non essential services so I just delayed going to dealer.


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
Original Poster
660catman
Combustion on 5 pistons [L2]
Combustion on 5 pistons [L2]
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Joined: Dec 13 2017, 12:27pm
Years of membership: 3 years of membership3 years of membership3 years of membership
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Re: CEL constantly coming on

Postby 660catman [OP] » Dec 05 2020, 5:00pm

Well I jinxed myself. I was good until my last fill up with non ethanol fuel even though I said I was going back to E10. I ran it pretty empty and filled with just over 90 litres. P0172 and P0175 came on and now alcohol percentage is at 49. WTH!!!


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
Original Poster
660catman
Combustion on 5 pistons [L2]
Combustion on 5 pistons [L2]
Posts: 574
Topics: 5
Joined: Dec 13 2017, 12:27pm
Years of membership: 3 years of membership3 years of membership3 years of membership
Location: SE Manitoba Canada
Year: 2013
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Registered users

Re: CEL constantly coming on

Postby 660catman [OP] » Dec 21 2020, 10:14pm

Had enough!! Made appt next week to go to dealer. Alcohol up over 60! Other morning was hard starting and when it did go, it was a very rough idle.


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
Original Poster
660catman
Combustion on 5 pistons [L2]
Combustion on 5 pistons [L2]
Posts: 574
Topics: 5
Joined: Dec 13 2017, 12:27pm
Years of membership: 3 years of membership3 years of membership3 years of membership
Location: SE Manitoba Canada
Year: 2013
Make/Model: Chevrolet Silverado
Variant: LT
Extra Info: 1500 CC 5.3 4WD
Group Membership:
Registered users

Re: CEL constantly coming on

Postby 660catman [OP] » Dec 29 2020, 10:59pm

Dealer did the reset for 30 bucks. We will see how long it lasts!



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
Original Poster
660catman
Combustion on 5 pistons [L2]
Combustion on 5 pistons [L2]
Posts: 574
Topics: 5
Joined: Dec 13 2017, 12:27pm
Years of membership: 3 years of membership3 years of membership3 years of membership
Location: SE Manitoba Canada
Year: 2013
Make/Model: Chevrolet Silverado
Variant: LT
Extra Info: 1500 CC 5.3 4WD
Group Membership:
Registered users
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