Ibhave the same problem an I was about to drop my fuel tank swap out the vapour blocking g valve. What did you end up doing for your pick up?

 

What is the problem understanding the code when it says >> OPEN CIRCUIT?
Replacing an electrical valve that can't operate because the circuit to it,...... is open. Reply #8.
The code will never be fixed until the wiring is fixed.
Good luck.

 

How does a PCM detect an open circuit code on a coil-based part like a relay/valve? The relay/valve itself is part of the circuit and therefore part of the PCM's circuit test. So if the part itself is bad and the PCM doesn't see the return voltage back, an open code is set. Could be a wiring issue or the relay/valve itself.

 

All electrical circuits are monitored for performance by the electrical circuit current >>waveform<< expected at time of operation on and off.
Opens , shorts, grounds and crossed are detected in this way.
A valve that attempts to operate or release and >sticks< is also evaluated. On and Off waveform is altered by the stuck core position or does not perform within a time window allowed.
There is no other practical way to accomplish these evaluations.
It's done for all Transmision solenoids and all other valves electrically operated.
In the case of the ignition coil, the inductive kick is evaluated. Failures lead to codes P035x, on hard faults.
Po30x for ignition/cylinder failures is totally different. It is set for slow rotation time for any given cylinder and not usually a circuit failure but loss of spark/performance at the Plug, Fuel or Cylinder mechanics' fault. The Crankshaft Sensor is used for this timing function every time each cylinder comes up in the order.
Good luck.

 

So, yes, an open circuit code on an actuator like this could have been due to an internal failure of the actuator.

Therefore, it is not hard to understand why someone might replace the actuator even though testing is always best practice.