Question about 2007 Subaru Impreza 2.5

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Oil pressure switch burst

My oil pressure switchs are constantly bursting (the fail-safe on top of the sensor ponctures) and check engine goes on. I've changed the two sensors twice and just changed one for the third time and it just bursted again.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 58 Answers

SOURCE: 91 LEGACY STARTED RUNNING ROUGH

The cylinders are numbered as on the spark pack you changed. You might have done better putting the seafoam in the tank as an injector cleaner. Not sure why you changed so many parts, you seem to know how to get the codes from test connector lead hookup and the blink pattern. You might also want to check the fuel rail pressure and the crank and cam angle sensors. Before replacing the injector, swap the #4 injector with the adjacent one and see it the code moves with the injector or stays put. If the code stays on #4, then check the injector wiring, if it moves clean or replace the injector.

Posted on Mar 21, 2009

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  • 7 Answers

SOURCE: Engine check light comes on

Have you tried disconnecting the battery for half an hour to reset the computer? If that doesn't work I think the Vacuum Pressure Sensor is in the black box with all the vacuum hoses going to it beside the air filter housing. Not sure tho, subaru will tell you where it is & how to test it if you ring them & ask for the workshop.

Posted on Apr 10, 2009

SOURCE: I have a check engine light on that comes and

Real easy

At 100,000 miles or in your case, when the O2 Sensor fails,
you replace one or two, if that applies

You replace the ones closest to the engine
If dual exhaust,then you do both sides

Bank A or Sensor 1 Bank 1 is on the side that cylinder
#1 is on

Sensor 1 Bank 2 the other side

You do not have to do the rear or monitor sensors,
they are for catalytic efficiency or converter check
of how it is doing.

Front --pre cat
Rear --post cat

Posted on Jul 04, 2011

chuckster57
  • 1102 Answers

SOURCE: I have a 99 Subaru Legacy Limited 2.5L. My check

I would change it anyway. I would scan it again and see if the knock sensor code is stored.

Posted on Jul 10, 2011

Testimonial: "Thanks. Makes sense to me."

subytech1
  • 244 Answers

SOURCE: 2000 outback check engine light on all the time,

You have to hook an OBD 2 scan tool up to the data link connector and check to see what code is present. If you have a knock sensor code, you need to replace the knock sensor. If you get a P0420: Catalyst system efficiency below threshold, you will need to replace your catalytic converter. But if it is nothing important, the only way to clear a check engine light is with a scan tool. You can usually go to any aftermarket parts store and they will check and clear you codes and light for free. I hope this info helps.

Posted on Aug 01, 2011

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1 Answer

Where is the oil sending unit on a 1996 mercury cougar xr7 ? Its cause my oil pressure gauge is bouncing up and down...i dont know why...can anybody please help me thank you so much


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The low oil pressure warning lamp will illuminate anytime the ignition switch is turned to the ON position without the engine running. When the engine is running, the light also illuminates if the engine oil pressure drops below a safe oil pressure level. To test the system, perform the following:
If the oil pressure light does not work, perform the following:
  1. Turn the ignition switch to the ON position.
  2. If the lamp does not light, check for a broken or disconnected wire around the engine and oil pressure sending unit switch.
  3. If the wire at the connector checks out OK, pull the connector loose from the switch and, with a jumper wire, ground the connector to the engine.
  4. With the ignition switch turned to the ON position, check the warning lamp. If the lamp lights, make sure the oil pressure switch is properly grounded in the cylinder block, and if so replace the oil pressure switch. If the lamp still fails to light, check for a burned out lamp or disconnected socket in the instrument cluster.
To diagnose an oil pressure light that stays on, perform the following:
  1. Check the engine oil level and top off as necessary. If the engine was 2 or more quarts low on oil, test start the engine after topping off the oil level and recheck the oil pressure light operation. If the light stays on, stop the engine immediately and go to the next step.
  2. Disconnect the wire at the sending unit, then turn the ignition switch to theON position. If the light remains on, check the wire from the sending unit to the gauge for being shorted to ground and repair as necessary. If the light goes out, turn the ignition switch OFF and go to the next step.
  3. Replace the oil pressure sending switch with a known good switch.
  4. Start the engine and check the oil pressure light operation. If the light stays on with the engine running, stop the engine immediately to avoid severe engine damage until the cause of the problem can be determined.

WARNING
If the oil pressure light remains on while the engine is started, stop the engine immediately. Do not operate the engine until the cause of the problem can be determined. Operating an engine with low oil pressure will cause severe internal damage.

Possible causes for an oil pressure light to stay on are:


Pinched or grounded sensor wireDefective oil pressure sending unitRestricted or severely leaking oil filterExcessive internal engine bearing clearance.Insufficient or severely contaminated engine oilBlocked oil pump pickup screen or severely worn oil pump

Mar 31, 2016 | Mercury Cars & Trucks

1 Answer

96 Chevy blazer how do I get out of safe mode ran low on oil now runs an drives but won't let car go fast past 2000rpms


The computing system on your vehicle has no safe mode for running low on oil . The only thing that will happen is the check gauges light will come on.
The oil pressure gauge is an analog device that is located in the IPC. The oil pressure gauge is operated directly by the oil pressure sensor circuit. As the engine oil pressure changes, the resistance of the sensor and the current flow in the oil pressure gauge changes. The current flow in the oil pressure gauge causes the needle to move in order to appropriately display the engine oil pressure. A sensor resistance of 1ohms will display as 0 kPa (0 PSI) and a resistance of 88 ohms will display as 80 kPa (80 PSI ). The IPC also monitors the oil pressure sensor circuit and interprets the current flow in this circuit in order to determine when the engine oil pressure is too low. If the oil pressure is too low, the check gauges tell tale will turn on. The oil pressure sender is located on the left side of the 2.2L. The 4.3L engine, oil pressure sender is located at the top left side, near the distributor/high voltage switch.
Try disconnecting the battery cables an hold them together for ten minutes , reset ECM !

Nov 08, 2015 | Cars & Trucks

1 Answer

Oil getting into water


if it is an automatic ( make and model omitted in question) there is every chance that it is transmission oil from a burst cooler in the radiator tank. The fix is a new radiator or and air to air cooler core fitted in front of the radiator. If the engine is a diesel or an engine that has a sump oil cooler then the oil core has burst allowing engine oil into the radiator vial the coolant system. It may be from a failing head gasket where the oil hole to the rocker gear is leaking across to a water jacket

Feb 26, 2015 | Cars & Trucks

1 Answer

WAS TRAVELING IN MY GMC 2006 SIERRA TRUCK WHEN MY OIL PRESSURE DROPPED TO 0 IS THIS A PROBLEM ?


surely it is a problem and major one. DO NOT run the engine at all. You have to carry some checks to confirm whether your gauge is not lying. Check whether you have the correct oil level fist. Check whether your oil filter is a good and non burst . Check by means of oil pressure tester the pressure of your oil, Check whether the oil switch is accurate or is not working. Check the wiring on the oil switch, finally if neither of the above have problem,check the oil pressure pump in the engine is not the culprit. Good luck.

Aug 17, 2012 | GMC Cars & Trucks

2 Answers

I have a 94 caprice classic that wil crank but it wont turn on. It just got a new ignition and key for it and it still is doing this problem. it says press key fault and low oil pressure then it shuts off....


You vehicle is equipt with a fail safe switch incase your oil pressure is low it shuts off the fuel pump, More likely your oil pressure switch will need to be replaced,its 2011 relace the oil pressure switch more likely the sensor itself has failed,(oil breaks plastic after awhile,) make sure you have motor oil in the crankcase check the level,

May 04, 2011 | 1994 Chevrolet Caprice Classic

1 Answer

Oil pressure light goes on --check oil oil is okay. now the check engine light goes on too. do you think i need to change my oil pressure switch?


first get the code that is stored in the computer when the check engine light went on. Most major auto parts stores will read that code out for free. If the oil pressure is truly very low, the engine will be damaged so be careful. Changing the oil pressure switch is a safe move. But if the oil pressure remains low on the new switch you must investigate why. The oil filter could be plugged up, the oil pump could be going bad, or there could be a major internal engine problem. That is why you need the code. It could give a clue as to what is happening in the engine.

Feb 09, 2011 | 2003 Toyota Corolla

1 Answer

I need to know where the oli sending unit is and how to replace it?


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Fig. 1: Location of the oil pressure switch-3.3L and 3.8L engines


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Fig. 2: Location of the oil pressure switch-3.0L engine


zjlimited_307.jpg

Fig.: Oil pressure switch (sending unit) schematic


The low oil pressure warning lamp will illuminate when the ignition switch is turned to the ON position without the engine running. The lamp also illuminates if the engine oil pressure drops below a safe oil pressure level. To test the system, perform the following:

  1. Turn the ignition switch to the ON position.
  2. If the lamp does not light, check for a broken or disconnected wire around the engine and oil pressure sending unit switch.
  3. If the wire at the connector checks out OK, pull the connector loose from the switch and, with a jumper wire, ground the connector to the engine.
  4. With the ignition switch turned to the ON position, check the warning lamp. If the lamp still fails to light, check for a burned out lamp or disconnected socket in the instrument cluster.

REMOVAL & INSTALLATION
On the 2.4L engine, the oil pressure switch is located on the side of the engine block facing the firewall. On the 3.0L engine, the oil pressure switch is located on the oil filter adapter housing, next to the starter motor. On the 3.3L and 3.8L engines, the oil pressure switch is located next to the oil filter.
  1. Locate the oil pressure sending unit on the engine.
  2. Disconnect the negative battery cable.
  3. Disconnect the pressure switch electrical harness.
  4. Using a pressure switch socket, deep-well socket or wrench, loosen and remove the pressure switch from the engine.
To install:
  1. Install the pressure switch into the engine and tighten securely.
  2. Attach the electrical connector to the switch.
  3. Connect the negative battery cable.
  4. Start the engine, allow it to reach operating temperature and check for leaks.
  5. Check for proper oil pressure switch operation.

Hope this helps (remember to rate this answerr).



Dec 22, 2010 | 1999 Plymouth Voyager

1 Answer

Oil pressure light on at idle for Volvo S40 MY2005 B5244S4 Engine


Since you are going to check the one way valve and cleaning the filter too, I would recommend to check the intake air filter and clean it throughly. After that use carb cleaner to free up the nozzles of the injector valve . If the engine sound better after using carb cleaner, add some into the fuel from the fuel filter or pump, whichever one has easy access, and gun your engine in short bursts, after which it should run better.........sodeep

Aug 01, 2009 | 2005 Volvo S40

1 Answer

Gauges say no pressure in engine 1995 vw golf


Get someone to check oil pressure with a mechanical gauge, to verify whether you have oil pressure or not. These engine/vehicles, have 2 warning sensors & a control module in the instrument panel. Once you know you have pressure for sure, then you can proceed from there.

May 09, 2009 | 1992 Volkswagen Golf

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