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Old 02-28-2008, 09:14 PM   #1
theDaishi
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Member#: 116247
Join Date: May 2006
Chapter/Region: MWSOC
Location: gunsrazorsknives
Default New WRX owner. Used 2002 wagon. Code P1086

P1086 Tumble generator valve #2 (LH) position sensor circuit low input

I live in Omaha, bought the car in Buffalo, NY... 2 days ago. The CEL came up 30 miles into my trip. Around 500 miles back, it shut off. Came back on this morning.

At first when I got it scanned at Autozone it said Manf control fuel & air metering auxilary emission controls. Thought at first it was MAF, so I put a newer one in anyway and obviously didnt fix it.

Got on here and found it was the tumble generator. I am new to the WRX world, and have heard a little about the butterfly valves and tumble generator whatever, but I'm pretty much lost.

How serious, and possibly fix myself? The car has 100,000 + miles, so the low input makes me think it might be a corroded wire or something?
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Old 02-28-2008, 09:41 PM   #2
UkNuck
Scooby Guru
 
Member#: 21808
Join Date: Jul 2002
Chapter/Region: E. Canada
Location: National Capital Region
Vehicle:
02 GroceryGettAr
Nonemore Black

Default

iirc 1086 is the sensor rather than the actual valve mechanism. They're fairly easy to break - dealer broke my LH one when replacing the a/c compressor and several people have broken a RH one when doing turbo replacements

if you search the 2.0 Powertrain forum there's some good info

iirc the dealer will try to sell you the complete assembly, but the faulty sensor is the same part as the throttle position sensor (TPS) which is a much cheaper fix
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