It is possible. You’d be having some drivability issues too… surge, turbo lag. “No boost” is definitely a drivability issue lol. The connectors are prone to failure because of the location near the t-stat (heat). P0046 actually is a turbo-related code. This video might help you out (helped me once)

 

I saw this video, thanks. If I got it right, he changed the PCM.

 

Yes, but he also stripped back and inspected the vgt solenoid wiring to rule that out. Check the basics first. Do you have Forscan? It’ll help.

 

P0046 - Turbocharger boost control solenoid circuit/range performance - ie VGT - mess with the wiring for the VGT solenoid. Wiggle it, inspect it, and repair and replace if needed.

 

Do you know the PCM connector pin numbers of the two actuator wires?

 

10 and 11 are the wires.

 

As I posted on FTE - the '03's do not use the EBP sensor assuming they were given the flash update in 2006 (and almost all of them got it). It is the inferred EBP flash.

 

Hi Mark, what is the function of this then on the 03? I had it pressurized to 30psi, no change in value.

 

Thank you very much. The EBR sensor shows KOEO 0psi. With a new sensor, it also shows 0psi. Do you think this has something to do with the turbo problem?

 

Interesting, the Ford information for the 03 connector shows it to be C1381c (not "t"), but the only difference is that the circuits on pins 10 and 11 are reversed. It is of no consequence, just interesting.

 

The EBP serves no purpose on an 03 that has received the flash update.

 

I had too much to do today, I could only check the voltage at the wiring plug of the turbo solenoid, there is vehicle power, 12,XX volts. Therefore it should not be a wiring issue.

 

You can't eliminate wiring until you see 12vdc on wires at control module. You can have good power wire at solenoid but open wire back to controller. Measure the resistance across the two wires going to the solenoid and get ohms reading. Should be no more than 1 ohm that what you Measure right on the solenoid.

 

Check I again, most sensors are 3 wire minimum, power, ground, signal back to system.

 

The VGT is only two wires. Pulse Width Modulated actuator

 

My bad, he jumped from discussing no boost pressure to turbo and I didn't notice

 

In which volt range is the actuator controlled by the PCM? I had thought about whether it would theoretically be possible to remove the actuator for testing and use a power supply unit to test whether the cam follower on the actuator moves?
Is the voltage from the PCM reversed? The actuator moves in 2 directions.
If you knew the voltage range in which the actuator is controlled, you could at least check whether it reacts.
I currently have no IDS. With Forscan, as far as I know, you cannot manually change VGTDC# to observe EBP_G (exhaust pressure) and MGP (manifold gauge pressure).

 

The ground side is pilulsed to ground the pct of cycling off and on is the pulse width. Example 10% on and 90% off would be a 10% pwm as an example. A 90% on would be 90% switched to ground and 10% off. This is a simple example of how pwm works. The scan tool usually has a control to let you manually position servos and other control devices. Look it up and see how your ST works in control mode.

 

The scan tool usually has a control to let you manually position servos and other control devices. Look it up and see how your ST works in control mode.

Don't know about this with Forscan.