Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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What model and engine size is vehicle?
I think the new valve has probably failed, I'm assuming you have activated pump already? does scan tool allow you to activate valve?
I think troubleshooting chart is going to be your best option with this code. This code means the pressure sensor built into the valve did not detect enough pressure which would either mean weak pump, clogged port, or sensor not working properly and the troubleshooting chart will walk you through testing each component. Here is chart, let me know if you have more questions. Thanks. https://www.dropbox.com/s/dfc3bqiowc98evp/0411.pdf?dl=0
Ever get it figured out? Please do not forget to rate answer. Thanks.