Thread: D4 Performance Restricted

That sounds like the solenoid that controls the bypass valve.

The vacuum line runs up to the top of the front of the engine from the air valve below and connects to a solenoid that controls the vacuum flow. Have a hunt around to see if you can spot the solenoid and check its connector and nearby wires.

I feel like we're getting closer and closer to a possible solution here, is this where I should be looking?

Thanks

In the right area but you need to be sure that the hose goes down to the isolation valve. How many solenoids just there? Can you disconnect and reconnect all electrical connectors in the vicinity?

I can't help by checking mine as mine's having a holiday at the mechanics.

Originally Posted by ZKEHY

I feel like we're getting closer and closer to a possible solution here, is this where I should be looking?

Thanks

I have had a similar problem.

3.0l Turbo malfunction

I remember that one!

The other solenoid is for emission control and is only available c/w hoses according to the parts manual.

Spray the contacts with contact cleaner/lubricant for starters.

So I've had a poke around and everything looks ok in there, all the hoses were fitted alright and the connectors were good. Car is booked in to the mechanics for an engine and trans service on Friday so I'll see what they say about it and update on here when I find a solution. All I can seem to find on the net relating to the error code is relating to Saabs.

In my case it was not a hose / connection problem. It's a vacuum operated switch. The switch had failed - it's an electrical problem.

Soooo, interesting visit to the mechanics today. They pulled 5 turbo codes (worth mentioning, since the last code clearing reset I had got the rarer engine light plus performance restricted the night before and decided not to clear that one even though I think it's causing erroneous codes). They said the codes would indicate requiring a DOUBLE turbo replacement, but they weren't convinced. They said the secondary turbo was bypassing oil for which there was a modification they could do that would hopefully fix it. Other than that they cleared the codes and said bring it in when they reoccur (which the restricted performance did 10 minutes after leaving, no engine light though, would have liked to take it in right then but they'd closed). So any thoughts on these developments anyone?

(Also the issue with the brakes was because the pads were getting low, had them all replaced and it's perfectly fine now)

Cheers