99 5.7 yukon check engine light and ABS light blinks 7 times

ezbtr

Captain
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May 1, 2002
Messages
3,094
just tonight, running great, can I assume this an 02 sensor display?
 

windy5849

Petty Officer 1st Class
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Aug 12, 2010
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Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

If you have an autozone or advanced auto nearby,they will plug in their tester and tell you what the trouble code means for free. Naturally,they hope you will buy the part from them.I don't know what the seven blinks mean,possible gas cap loose?
 

bruceb58

Supreme Mariner
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Mar 5, 2006
Messages
30,608
Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

just tonight, running great, can I assume this an 02 sensor display?
It could be many things. You have to get the code pulled.
 

royal0014

Master Chief Petty Officer
Joined
May 6, 2010
Messages
874
Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

Check Engine and ABS??

First, check the brake fluid level.
Second, get the code read, soon!



<<)))(((>>
 

Bob_VT

Moderator & Unofficial iBoats Historian
Staff member
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May 19, 2001
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Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

just tonight, running great, can I assume this an 02 sensor display?

It means the driver needs a root canal!! :D I could not resist! ;)
 

j_martin

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Sep 22, 2006
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Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

Normally you have to put in a jumper or do some fancy key switching to get flash codes. I suspect something is wrong with the ABS brakes and it's a safety issue, thus the flashing Christmas tree to get your attention. If it occurs without special effort, I'm sure there's a reference to it in the owner's manual.
 

bruceb58

Supreme Mariner
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Mar 5, 2006
Messages
30,608
Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

Typically, owners manual tell you to take it into the dealer if the CEL is on. They never say anything about troubleshooting. Also 99 is an OBD2 vehicle. No flash codes.
 

jeeperman

Lieutenant Commander
Joined
Aug 2, 2001
Messages
1,513
Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

My 99 Tahoe CEL comes on.
I check all the fluids and air filter and nothing wrong there.
After a few days (14 or so)the CEL goes away.
Then in 14 days it comes back for no apparent reason.
Everything runs and sounds fine, no change in mileage or tail pipe stink either.
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,608
Re: 99 5.7 yukon check engine light and ABS light blinks 7 times

My 99 Tahoe CEL comes on.
I check all the fluids and air filter and nothing wrong there.
After a few days (14 or so)the CEL goes away.
Then in 14 days it comes back for no apparent reason.
Everything runs and sounds fine, no change in mileage or tail pipe stink either.
Even though the CEL light goes out doesn't mean there isn' somehing wrong. You can pull the code after the CEL goes out. It gets logged. Could be something as easy as a misfire caused by a marginal spark plug. It is always a good idea to see what caused it.
 
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