Dash warning indicator question.

[bears4x4]

Just happened this weekend, on my way out to a friends and on my way back home, when I was running 65-70 after a few miles of this speed a wrench icon poped on, after I spent the day at friend I started the truck and light was off till I reached 65-70 again. I take it that their is a code stored . Am I right. Haven't had a chance to readit yet.

 

[DaveBen]

The code was set when the PCM detected it. The PCM turned on the light, so the code will be there whether or not the light is on.

Dave

 

[hulkster]

Yep, there will be a code set. wrench light is more serious than a check engine light.
wrench light in most cases will put the truck in limp mode and usually it is set by something mechanical like, stuck turbo, or a circuit problem, the processor in the truck determines the priority of the code by condition you are driving when it trips the wrench light. so if the turbo is sticking,when you get on the throttle the wrench will light but probably won't light when your just putting around. a exhaust back pressure sensor fault will set a check engine light untill you repair the fault, most will ignore it for awhile i have, ignore a wrench light long enough and the processor will put you in limp mode...hope this is helps

 

[bears4x4]

Any recommended scanners for our trucks to scan and clear codes when done.

 

[DaveBen]

I like AutoEnginuity® - OBD2 Scan Tool - Professional PC and PDA Diagnostics it goes on a Windows laptop and does a great job of diagnosing, among other things. I know there are a bunch of hardware scanners that work good, but I don't know of any off the top of my head.

Dave