My '02 3.5SE is throwing this code (P1800) and I have been expecting a problem of some kind as the car as been struggling with acceleration. Also, this is not turning the check engine light but I found the code when my wife left the gas cap unscrewed in tight and it threw a 0453 code and I saw the P1800 code. I clear both codes but the P1800 came back. Again it is not turning on the check engine light.
My car has about 146,000 miles (stock, no mods) on it and I would assume just replacing the VIAS solenoid would correct this problem but anyone has any advice I would certainly appreciate it. Not really interested in moding it but am I right in assume if the solenoid is not closing it would be constantly open and cause the lost of throttle response?