P0108/rough idle error code after fishtailing and spinning on the highway

A

Adam Peacock

This morning I had a a P0108 error code (Manifold Absolute Pressure/
Barometric Pressure Circuit High Input) come on after I lost control
of my 2000 Legacy GT 5speed on the highway - fishtailed about 4 times
and then did a complete 360 before coming to a stop (deer jumped about
a quarter second in front of me at 65 mph). Now the car has a really
rough, low RPM idle but is fine at speed. Does anyone know what the
cause of this could be?

-Adam Peacock
(e-mail address removed)
 
Adam said:
This morning I had a a P0108 error code (Manifold Absolute Pressure/
Barometric Pressure Circuit High Input) come on after I lost control
of my 2000 Legacy GT 5speed on the highway - fishtailed about 4 times
and then did a complete 360 before coming to a stop (deer jumped about
a quarter second in front of me at 65 mph). Now the car has a really
rough, low RPM idle but is fine at speed. Does anyone know what the
cause of this could be?

You scared the hell out of it.
 
Look for a vacuum line that may have come off. Intake, throttle body
would be a good starting point.
 
AS said:
Look for a vacuum line that may have come off. Intake, throttle body
would be a good starting point.

Good suggestion. I would also just clear the code and see if it returns.
I suspect it will, the rough idle seems to point to a real issue, but
sometimes clearing the ECU will work miracles.

Carl
 
Carl 1 Lucky Texan said:
Good suggestion. I would also just clear the code and see if it returns. I
suspect it will, the rough idle seems to point to a real issue, but
sometimes clearing the ECU will work miracles.

Carl

It might. Subaru ECUs are adaptive. If it sees a code, it assumes
something is wrong and tries to compensate for it. I have cleared misfire
codes (from my wife leaving the gas cap off) and the car smooths out.
 
Just wondering what caused your wife to misfire and what kind of gas cap
she has... i might one day need one for mine... ;)
 
Wives misfire constantly. Since only their creator can understand them and
they seem to communicate by telepathy or something, I doubt anyone will ever
figure out why they misfire. And when they do, the response is certainly a
code of some kind; and they don't need any kind of cap to do it...
 
Wives misfire constantly. Since only their creator can understand them and
they seem to communicate by telepathy or something, I doubt anyone will ever
figure out why they misfire. And when they do, the response is certainly a
code of some kind; and they don't need any kind of cap to do it...







- Show quoted text -


JD

Sure wish I knew how to clear those codes. Mine misfires all the
time.
My Subaru runs fine though.
 
JD

Sure wish I knew how to clear those codes. Mine misfires all the
time.
My Subaru runs fine though.- Hide quoted text -

- Show quoted text -

A lot of times you can clear the codes by disconnecting the negative
battery cable for a couple of minutes. Of course, it will also clear
your settings on the radio.
 
suburboturbo said:
JD

Sure wish I knew how to clear those codes. Mine misfires all the
time.
My Subaru runs fine though.

$70 at your local walmart and you'll have a code scanner that'll clear
and read them. I bought the nicer one at $100 and it's come in a lot
more handy than I'd ever think.

Or you can take the car to auto zone when they're not busy. They'll
scan and read the codes... but i dunno if they'll erase em though.
 
suburboturbo said:
JD

Sure wish I knew how to clear those codes. Mine misfires all the
time.
My Subaru runs fine though.

Chocolate and roses. My Scoobie runs fine too.
 
A lot of times you can clear the codes by disconnecting the negative
battery cable for a couple of minutes. Of course, it will also clear
your settings on the radio.

Won't clear a 2000 Sub. Codes are in NVRAM.
 

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