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 Post subject: P1250 and P0299
PostPosted: Sat Jan 10, 2015 12:07 pm 
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in hopes that this may help someone.

I pulled codes for P1250 and P0299, other symptoms were sluggishness, loads of soot when mashing on the skinny pedal. Also appeared to not heat up though its been below zero here, so hard to tell
I replaced part number 4606226AC which is listed as a vacuum Solenoid, apparently for the turbo.
Cleared the codes yesterday and they stayed away. only a couple short trips, but heat appears to be quicker and no soot under load anymore.

random pic off internet for visual reference

Image

part is located up near the passenger firewall. Clip toward the back needs to be pulled out to lift the part off its mounting post. electrical connection also needs to be have part opened a little to allow for release. swap hose connections and slip back on mounting post and connect electrical and good to go. Takes a minute to replace. 2 with careful deliberation.

I've seen another post here where they were quoted 260$ dealer to replace. that's a large bill. I'd expect maybe 50$ labor as they have bills to pay too, but it shouldn't take more than 1/2 hour for diagnostic and replacement. maybe an hour by the time the wander to the parts dept. and back with a stop to chat with the nice ladies in the office.

My cost was about 40$ delivered for the part. I'm not one for endorsing vendors and a google search of the part number will find many leads.

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 Post subject: Re: P1250 and P0299
PostPosted: Sat Jan 10, 2015 1:47 pm 
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That solenoid function can be quickly tested by a bypass posted at viewtopic.php?f=5&t=70602&p=757348&hilit=boost+solenoid#p757348

It's the vacuum reservoir solenoid (a.k.a. solenoid secondary runner valve per the parts fiche)

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 Post subject: Re: P1250 and P0299
PostPosted: Sat Jan 10, 2015 2:30 pm 
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Everyone take notice, here: this is the Vacuum Reservoir Solenoid or Vacuum Control Solenoid for the Vacuum Reservoir
- strictly on-off operation, no regulation
- key-on connects the vacuum pump to the reservoir
- key-off disconnects the vacuum pump port, blocks the port to the reservoir to maintain vacuum after shutdown
- make sure you plumb the hoses correctly, as you found them - incorrect connection will dump vacuum reservoir at key-off

This is NOT the Boost Pressure Solenoid, or Boost Control Solenoid, which is the larger of the two on the right fender, is mounted in front of the VRS, and which has the clear in-line fuel filter dangling below, used to filter the vent for the Vane Control Actuator
- BPS is a Pulse-Width-Modulated vacuum regulator valve
- connected to the vacuum reservoir, controls varying levels of vacuum to the VCA mounted on the turbine housing
- hard plastic line to the VCA
- haven't found a pic of the BPS or I'd post it for your comparitive enjoyment


Image

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