heartless Posted January 10, 2015 Share Posted January 10, 2015 (edited) I tried to do a search, but it seems the forum search software requires 4 or more characters (makes it very difficult to search for this kind of issue) For the last couple of days, my 95 Legacy, 2.2, AWD, auto with about 220K has thrown a P0106 code (thurs & fri) - both times this occured in the evening when coming home from work, temps have been ridiculoulsy cold with the wind chills (-35 to -40F) - actual air temps have been between 0F & -15F - no issues with the morning commute... and the car continues to run & drive fine for the rest of the trip home - only noticeable issue is the CEL is on. I typically start the car and let it warm up for at least 10 minutes before driving in this kind of cold. Thursday was one of the "warmer" days and we got about 3/4 inch of blowing snow that day (first day of the code) We have an Actron CP9175 code reader - the actual reading i get is: P0106 - MAP/Baro CKT Range/Perf So does the '95 actually have a MAP sensor, or is it a MAF? (i thought it was still MAF?) Could it simply be the crazy cold temps that are affecting the sensor? altho it has been crazy cold all week - this has only popped up the last couple of days... I have read in the past in other threads about solder joints in the sensor possibly cracking? could this be a source? dirty sensor? What does "CKT" mean? edit - ok, searching for the actual code comes up with a bunch of stuff, but no real clarification on the issue - is 95 MAF or MAP? I have a 90 Lego for potential parts donor - are they the same setup? Edited January 10, 2015 by heartless Link to comment Share on other sites More sharing options...
Fairtax4me Posted January 10, 2015 Share Posted January 10, 2015 (edited) 95 could have either MAF or both, MAP and MAF. My 95 2.2 auto wagon had both. My 95 MT fwd sedan has only MAF. Passenger strut tower there is a little bracket with two dohickies on it. One is a small squarish block with a vacuum nipple sticking off the bottom, 3 wire plug. That's the MAP sensor. The dohickie right next to it is a solenoid that switches between engine vacuum and atmospheric pressure. Subaru calls it a "pressure sources switching solenoid valve". On some cars it may also have a vacuum line to the evap system. On those it will switch between engine and evap pressure. Usually when you get a p0106 its because of a broken vacuum hose going from the intake manifold over to the PSSSV. The vacuum setups vary. Sometimes it runs straight to the manifold, sometimes it runs to a T with one side to the manifold and the other to the FPR at the back end of the fuel rail on the passenger side. If the hood on your car is the original, there is a vacuum/emissions hose routing diagram that will show you the proper routing of the hoses. Old vacuum hoses get brittle and are likely to break in very cold weather, do a thorough check of those and make sure none are broken or loose. In about the middle of the line running from the engine to the PSSSV there is a little white or black filter. The filter is supposed to keep moisture and fuel vapor from getting to the MAP sensor. That filter can sometimes clog, or if its saturated with moisture it can freeze, and will block vacuum to the Map sensor. Remove the line from the PSSSV end and try to blow through it. A little bit of air should pass. If none passes the filter is clogged. Ditch the filter and you should be good to go. They don't cost much from Subaru, so if you want to replace it you can, but I've run my car for about 5 years now with out it. 90 may be similar but I'm not sure. If the 90 has a MAP sensor, its likely to be the same sensor at the least. MAP sensor failures are pretty rare. Usually its the vacuum hoses. Sometimes there is a wiring problem like a mouse got to it or the wiring chafed. I had a P0106 for several years and finally concluded the ECU was bad. Replacing the ECU finally made the code to away. It never made a difference in the way the engine ran, I just finally got tired of staring at that yellow light on the dash. "CKT" is an abbreviation for "Circuit". Edited January 10, 2015 by Fairtax4me 1 Link to comment Share on other sites More sharing options...
ferox Posted January 10, 2015 Share Posted January 10, 2015 Strangely enough, my ex-wife called me a couple days ago because she drove from Antigo, WI to Edwards, CO in her 2001 Legacy (straight through) and the same thing happened. As soon as she started going up a significant hill in Denver the CEL came on. She scanned it and got a code for the A/F feedback system MAF, MAP, or O2 sensor circuit. My theory was that the extreme cold was making material condense on one or all of the sensors and that the best thing to do would be to clean them since that's a good thing to do anyway, and wait for warmer temps. She called back later to say that the temps rose to 50 degrees and the CEL went off before she got around to cleaning any of the sensors. I reckon there is a good chance that you are experiencing a similar phenomenon. Link to comment Share on other sites More sharing options...
Fairtax4me Posted January 10, 2015 Share Posted January 10, 2015 Can you post the actual P0xxx code Ferox? Code definitions can vary depending on which scanner you use. Link to comment Share on other sites More sharing options...
heartless Posted January 10, 2015 Author Share Posted January 10, 2015 Thank you for the wealth of information, Fairtax. I have been reading thru a bunch of your posts about this code as well as some others I found using the actual code as a search term... doncha love it with the "maybe it does, maybe it doesnt" stuff? makes diagnosing things just that much more interesting. I am hoping for some warmer weather this next week - too darn cold to be poking around under the hood outside right now - barely above 0 and kinda breezy. Nothing has been done under the hood recently aside from adding washer fluid & checking oil...both on the wrong side from the sensor & related... good to know about that little filter - I think mine has one.... seems this 95 is much fussier about things than my 90 was - only time that car ever set a code was for a major misfire (cheap aftermarket plug wires that it came with) and the O2 sensor going out - and both of those happened at the same time on the same trip. Again - thanks for the info. Link to comment Share on other sites More sharing options...
heartless Posted January 10, 2015 Author Share Posted January 10, 2015 ferox - the condensation issue is a pretty good theory, and quite plausible given the temperature extremes we have been experiencing lately - 40+ one week, to minus 10 the next! and everyone wonders why I hate winter so much! Link to comment Share on other sites More sharing options...
ferox Posted January 10, 2015 Share Posted January 10, 2015 Can you post the actual P0xxx code Ferox? Code definitions can vary depending on which scanner you use. Let's see, she got a P0130 from an Innova scanner borrowed from Napa. Link to comment Share on other sites More sharing options...
ferox Posted January 10, 2015 Share Posted January 10, 2015 ferox - the condensation issue is a pretty good theory, and quite plausible given the temperature extremes we have been experiencing lately - 40+ one week, to minus 10 the next! and everyone wonders why I hate winter so much! Yeah, the wind chill created on the car from driving in those conditions is insane. Talk about a cold air intake. In the case of my ex, she drove in those conditions for 18 hours straight. I think it's a testament to the engineering that the only complication was that the CEL came on temporarily. Link to comment Share on other sites More sharing options...
heartless Posted January 10, 2015 Author Share Posted January 10, 2015 according to this site, P0130 is O2 sensor circuit malfunction (bank 1, sensor 1) Link to comment Share on other sites More sharing options...
Fairtax4me Posted January 11, 2015 Share Posted January 11, 2015 Yeah, the wind chill created on the car from driving in those conditions is insane. Talk about a cold air intake. In the case of my ex, she drove in those conditions for 18 hours straight. I think it's a testament to the engineering that the only complication was that the CEL came on temporarily. Considering that the O2 sensor needs to be about 600°F in order to operate, yes, the cold could very well be a factor in that code. Link to comment Share on other sites More sharing options...
heartless Posted January 12, 2015 Author Share Posted January 12, 2015 well, after clearing the code again saturday morning, went to town on sunday (temps in the teens above 0) with several ignition cycles (multiple stops in town) and so far no reappearance... will have to see what happens today now that it has completely cooled. It is a bit colder again today, too - currently minus 4F... Link to comment Share on other sites More sharing options...
Fairtax4me Posted January 12, 2015 Share Posted January 12, 2015 Mine would always set after two drives of more than about 10 miles. Usually I would reset the code, drive to school, then it would set on the drive home. When I was only driving 3 miles back and forth to work every day, it would not set for over a week sometimes. Link to comment Share on other sites More sharing options...
heartless Posted January 13, 2015 Author Share Posted January 13, 2015 my drive to & from work is about 10 miles each way... the drive to town was about 30, several stops around town, then 30 home... no code set... still no code after the drive to work this morning, or the drive home this evening may just be a temporary reprieve, but then again, it could have just been the crazy cold weather screwing with things... either way, I will take it! Link to comment Share on other sites More sharing options...
heartless Posted January 15, 2015 Author Share Posted January 15, 2015 so far no recurrance of the MAP code since clearing it saturday - but plenty of other strange things happening with the 95... stopped to get gas last night after work, reset my tripmeter as usual, started the car and the AT Temp light is flashing at me...started driving for home and the speedo isnt working - then suddenly it starts working again - worked fine the rest of the way home... pull in the driveway, park the car and shut it off, and I hear a strange humming sound...pop the hood to find the ABS unit is freaking out - with the key off and out! disconnected the battery until i could get the darn ABS unit unplugged - reconnect battery - no more humming - car starts fine... will have to see what happens today.... Link to comment Share on other sites More sharing options...
Fairtax4me Posted January 15, 2015 Share Posted January 15, 2015 Well, the ABS issue is a fairly common occurance on the 95. But maybe some water got into the relay box on the ABS unit (small black cover) and it just needs to dry out? At temp light means the trans unit has a code stored. There's a secret handshake for reading TCU codes. If you search around here you'll probably find it. Link to comment Share on other sites More sharing options...
heartless Posted January 16, 2015 Author Share Posted January 16, 2015 speedo has been doing wonky things too - have to wonder if the AT Temp flashing and the wonky speedo are related? the AT Temp light hasnt flashed again since that one time - I have been watching for it. Link to comment Share on other sites More sharing options...
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