Out of service

Are your pressure gauges accurate?

 

Instead of keep firing the parts cannon at it, take it to a mechanic that can diagnose it.
Sometimes spending money upfront saves a ton.

 

About 15 years ago in Virginia I got shut down for the same thing in Virginia. Turns out I replaced the valve(red and yellow buttons) but, I failed to replace the spring behind the button......

 

Does your truck have a trolly brake? Seen those leak and cause random weird issues.

 

Ultimately, its the dash valves themselves and only the dash valves that will pop their buttons out when down to very low psi. If they are stuck in at zero psi, then they are sticking. If you just replaced the dash valve, then it is warranty parts failure. Get another one. A brand new dash valve set will never allow the buttons to stay pressed in with no air pressure behind them. So you can quickly test it right out of the box by pressing each button in and they should be spring loaded to pop right back out.

 

@Heavyd I have 2012 prostar Max13. It shuts off while driving.. Will start back up after 30 mins. It was doing this 1-2 time week but recently it is shutting off few times a day.
Thank you!

 

Shutting off at random can be a few different things with different troubleshooting directions. One common problem is simple loss of ignition power to the engine only. When this happens, just the engine shuts off but everything else stays on, so you get a specific combination of warnings. You will get the ABS and trac warnings lights on, and "Electrical Fault" message in the dash. These modules will log faults that they have lost communication with the engine. Another problem is everything shutting off, so the engine will shut down along with everything else, like you shut the key off. This will not cause warning lights or codes. In both situations, running the engine and going around and wiggling all the harnesses around the engine, ecm and batteries may induce your problem so you can track it down. Always follow the basics first and check battery and main ground connections.

But, the laptop is the first tool I grab and check for codes related to shutting down, such as fuel pressures, and trouble shoot from there.