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Username Post: service engine soon light on , but only code 12, . . .        (Topic#348961)
letsgo7815 
Forum Newbie
Posts: 10

Reg: 12-29-17
01-01-18 02:11 PM - Post#2719696    

this is weird....new to me truck
service engine soon light is on but only code 12 shows up when i jumper the AB on the obd connector.

any thoughts ....



 
bowtie44s 
Valued Contributor
Posts: 3963
bowtie44s
Age: 35
Loc: wv
Reg: 08-29-12
01-01-18 02:40 PM - Post#2719699    
    In response to letsgo7815

It will flash 12 three times to show it's in diagnostics mode then flash each trouble code three times before going to the next one.

Jeff

'88 Chevy K3500, aluminum head roller cam 511inĀ³ stroker 10.5:1 compression, 96 NV 4500, 94-98 grille, 305/70-16 (33x12) BF Goodrich KM2s, 91 cluster swap


 
letsgo7815 
Forum Newbie
Posts: 10

Reg: 12-29-17
01-01-18 02:51 PM - Post#2719702    
    In response to bowtie44s

Oh poopoo i never waited. . . Guess ill try it again



 
someotherguy 
Moderator
Posts: 28691
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
01-02-18 08:31 AM - Post#2719764    
    In response to letsgo7815

A how-to on checking codes this way, along with a code listing - linked in our FAQ post at the top of the forum -

https://www.chevytalk.org/fusionbb/showtopic.php?ti...

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
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