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Old 04-02-2019, 11:52 AM   #1
SAABeginner
 
Join Date: Apr 2019
Posts: 1
Lightbulb Code P0034

Hi, Couple of months back took the car to the garage, (Saab 93/08 reg)
They did a code read, it came up with the p0034 code which is a turbo charger circuit low. Months before it had an idle issue, i thought it a vacuum leak or something. They changed the sparks. This issue has returned though, so i doubt it actually was the plugs.

Back to the code. They cleaned the throttle body and cleared the code. The check engine light has returned. Can i ask whats the remedy for p0034 code?

Long winded apologies
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Old 04-10-2019, 05:58 PM   #2
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Join Date: Nov 2016
Posts: 15
Had a 2001, 95 w/ V6 that had one P code after another. Almost as though someone shot the engine with a shot gun.

There are a couple of web pages that explain P codes. In my case, it was worth buying an OBD reader. OBD translates to On Board Diagnostics and has been used/required since model year 1996. The OBD reader, for me, was well worth the approx. $100. There are cheaper units and way more expensive readers. The range of functions ranges a lot between manufacturers and entry level to expert equipment level costing thousands. Do the research before buying.

As for my problems, the car sat outside in SW Florida sun and wasn't used for months. I believe all of the rubber, plastic and misc gasket materials took it on the cheek.

I ended up replacing a lot of the vacuum lines with new silicone lines. In some cases the line end was trimmed back and tube reapplied.

Replaced the fuel line pressure valve that maintains the fuel pressure at about 3 atmospheres if I remember right.

On this engine there was a thin short ~ 6" long vacuum line with attaching boots at either end. Replaced it with regular silicone tubing.

Spark plug selection and gapping is critical. Use NKG resistor plugs only.

If rough idle or operating problems (bad gas mileage) continues, have the oxygen / O2 sensors checked out. One or both may have failed.

Based on miles driven and quality of gas bought, the catalytic converters might be filled with crud.

I had a reoccurring problem with P0110 with a few others tossed in. Don't know if the 2 are related, but I could get it to go away and it would return. Sound familiar. Finally had the break master cylinder repaired and..... the problems (mostly) went away. It had a vacuum leak.

At one time a P0034 came up and I believe it was related to a vacuum leak. But, that was years ago and the problems were many.
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Old 04-11-2019, 04:43 AM   #3
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Join Date: Nov 2016
Posts: 15
Just found P0034 in the list I have. BTW, please use all digits, such as shown.
It is: P0034 Turbo Charger Bypass Valve Control Circuit Low

Check the valve for function. Some parts can be cleaned and reattached.
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