Quote:
Originally Posted by Siouxicide
I've done a search, read the sticky, etc. I'm getting these codes:
P0451 - evaporative emissions control system pressure sensor range/perf
P0446 - evaporative vent control circuit
1. Have others seen this and is there a simple solution?(I've replaced gas cap already)
2. GMMerlin mentioned vent solenoid, but where is it located on a 2007 Suburban 1500 5.3L? And the canister? Anything else I should be checking? I assume these parts will not be clearly marked.
Thanks in advance.
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After some other searching, I found that the vent tubing that's attached to the vent solenoid (and ultimately the charcoal filter and gas tank) can become plugged with mud/dirt. The vent end of the tube is held in place by wire ties along the fuel filler neck.
I found that mine was packed tight with mud. I cleaned out the mud and the light has been out ever since. I can only assume that was it.