97subaru936 Posted September 26, 2005 Share Posted September 26, 2005 After my last oil & air filter change the CEL comes on with P1143 Pressure Sensor Circuit Low Input. What Pressure Sensor is it talking about?? Charley Quote Link to comment Share on other sites More sharing options...
frag Posted September 26, 2005 Share Posted September 26, 2005 I think this sensor is located on the pass side strut tower. A couple of vac hoses are connected to it IIRC. Maybe they knocked off one of those hoses when replacing the air filter. Quote Link to comment Share on other sites More sharing options...
97subaru936 Posted December 14, 2005 Author Share Posted December 14, 2005 Thanks for the reply. I had to put it off for a couple of months. CV shafts had to be replaced and work picked up. I have isolated the code to the device you mentioned. After trying several changes and watching for new codes. It appears the device is stuck open. I've even applied 12vdc to the solenoid post but no change in the amount of vacuum that is able to pass thru it. After all that is said what is the part name or number for the dealership? I could just take the part off the car and show it to them, but I look rather "duh" to them anyway so why remove all doubt. Thanks, Charley I think this sensor is located on the pass side strut tower. A couple of vac hoses are connected to it IIRC.Maybe they knocked off one of those hoses when replacing the air filter. Quote Link to comment Share on other sites More sharing options...
nipper Posted December 15, 2005 Share Posted December 15, 2005 If i am correct, this used to be called a manifold absolute pressure sensor. Its a dual purpose sensor. It flips between manifold pressure and atmospheric pressure. It will affect perforamnce espeically in elevation changes. The solenoid you speak of being stuck means the car is not sensing manifold vaccume. This may be a pricey item at the dealer, but cheaper at a junkyard. nipper Quote Link to comment Share on other sites More sharing options...
97subaru936 Posted December 15, 2005 Author Share Posted December 15, 2005 I did get a manifold absolute pressure sensor failed code when I unpluged the solenoid. A couple of online part stores list it for $55 - $58. Ice storm today so I'll wait until it clears and dries up before I go junk yard hunting. Thanks for the info (nipper) Charley Quote Link to comment Share on other sites More sharing options...
jts99OBW Posted December 15, 2005 Share Posted December 15, 2005 MAP sensor for ~50 bucks! I've got a '99 OBW and the dealer wanted close to $300! Even about $200 from internet subie parts places. I can't remember what year your car was, but if you can get them for 50 bucks new, why bother hoping that the junk yard one still works? Quote Link to comment Share on other sites More sharing options...
nipper Posted December 15, 2005 Share Posted December 15, 2005 damn thats a great price, make sure its the right part ... nipper Quote Link to comment Share on other sites More sharing options...
97subaru936 Posted December 30, 2005 Author Share Posted December 30, 2005 The defective sensor was the one in front of the passenger side shock. My 97 MAP is inline with the air filter / intake. Local junk yard $25 + tax and a 10 day guarantee. The used part cleared the code and the car does seem to have more power. I didn't mean to imply that I could get a MAP sensor for $50, sorry. Frag & Nipper thanks for the help you sent me in the right direction. The solenoid is in line with the barometric pressure sensor. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.