CEL & VSC\TRAC Lights after Seafoam Treatment on 03'

[kaneman23]

I tuned up my 03' Sport (V8) - 85K mi this weekend. I went a head and did the seafoam treatment for the 2nd time since I've owned it (bought it new). I sprayed the throttlebody directly and then used about a 1/4 can through the PCV valve vacuum line. The rest went in the tank. After pushing it through the pcv line I got a CEL and lost my VSC\TRAC. I tried reseting the EFI without any luck. Tried again this morning and the lights were still on. My wife drove it to the store and it stayed parked for almost the entire day outside in the sun...

Then this afternoon, I went to go take it to the local autozone to get the CEL code. Almost 1/2 way there and I realized that the CEL was gone as well as the VSC/TRAC lights.... I'm not sure how the problem fixed itself unless it was a brief misfire and the OBDII just needed time to clear the CEL. Only other possibility is that the sun dried any moisture that may've been causing problems on a sensor (SWAG).

I'm thinking the Root cause was either O2 or VSV related from the research I've gathered. However, since the CEL went out I may never know for sure. I avoid the dealer as much as possible. My truck has only been to the dealer once for the sulfur TSB. Do you think I should take it in or not worry about it since the CEL is gone? I really don't like dealers...

Thanks,

JK

 

[hossmaster]

Sometimes those codes get reset after a certain number of drives. I can't recall exactly how it is worded, but basically the computer tests the sensors and whatnot over a # of starts drives and stops. I've had the same thing happen to me, just can't remember where I read that in my diagnosis of the problem.

 

[kaneman23]

Thanks Hoss..