Question about 2003 Subaru Forester

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Check engine light subaru forester 03

2003 subaru forester 23000 miles, check engine light on Auto zone
diagnostic siad Maybe Oxygen sensor O.E. after catalactic converter
cost U$ 139.99 or before catalactic converter U$ 439.99.
help in fixing this problem pls. should i buy both?

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Try ebay or used i would just replace the one downstream one frist

Posted on Jul 19, 2009


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My check engine light came on and I took it to auto zone and they siad it was the oxygen sensor. I do not have a book on my car and I don't know where the oxygen sensor is located on my car. I have a...

the o2 sensor is located in the exhaust stream-from the exhaust headers, they are usually not more than 18 to 24 inches from the exhaust as it exits the engine-follow the pipes, they are in front of the catalytic converter-if you have a 4 cylinder, you only have one in front of the cat-if you have a v6, you have two. the o2 sensors BEHIND the cat only monitor the efficiency of the cat itself and have no bearing on driveabillity-concern yourself with the front o2 sensors, they control how the vehicle runs-they get 'tired' as they get older, and should be replaced as you get closer to 100,000 miles. It will generally run better and get better gas mileage.

Sep 12, 2011 | 2004 Chevrolet Cavalier

1 Answer

I know where the sensor 2 is but where is the bank 1 for my 1999 subaru forrester code PO 141 O2 sensor heater bank1 sensor 2?

For 1999 Subaru Truck Forester AWD 2.5L MFI 4cyl the Oxygen Sensor is located under hood, center, rear engine area, mounted on catalytic converter.


Fig. Oxygen sensor location-Forester 1998-2002 2.5L SOHC engine (click over image for zoom).

Generally, Bank 1 is front and Bank 2 is rear.

Hope helps.

Apr 14, 2011 | 1999 Subaru Forester

1 Answer

Codes for 2001 subaru

P0130----- 02 sensor circuit on bank #1 sensor #1
P0171------System too lean bank#1
The oxygen sensor on bank #1 needs a new one. If you have a V6 engine, the 02 sensor is screwed into the exhaust pipe up near the exhaust manifold on the same side #1 spark plug is, that's bank #1
I don't have my manual at the moment, so I can't tell you exactly where it is.
The sensor down by the catalytic converter is sensor #2 you don't want that one.

May 14, 2010 | 2001 Subaru Forester

1 Answer

Engine hestitation, 2000 subaru forester

I think these codes are indicating a fault with your catalytic converter. The 02 sensors are each not returning the correct values to the ECM, causing a "suspect the 02 sensors" fault code.

Apr 01, 2010 | 2000 Subaru Forester

2 Answers

2001 subaru forester code is Poo37?

rear oxygen sensor heater circuit malfunctiion.
standard code definition for all the vehicules.
I'm not a Subaru specialist but you your vehicule could be equipped with two oxygen sensors. The front one located into/near the engine exhaust manifold and the rear one located near the catalytic converter.
The specific code you're getting is associated to the rear one.
First check the wiring and connection of your rear sensor for burned wire or corrosion/dirty in the connector. If the unit has never been replaced and your millage is around/over 100,000 mile, it's easy to think that your unit could be bad and must be replaced.
Easy to replace by yourself as long as you have the right wrench size fiiting the the bottom like nut seat.

Hope it will help
Sorry for my englis

Dec 24, 2009 | 1994 Subaru Legacy Outdoor

3 Answers

Check engine light is on. What could be wrong? Have tightened gas cap and waiting, but it is still on after one trip. If it is not the gas cap, what could be wrong with the emissions? Subaru forester...

02 sensor =oxygen sensor or low fluid levels such as oil antifreeze or just routine maintenance as well ,if you inspect the motor area and find nothing wrong its most likely emissions again a sensor however merely disconnecting the negative terminal on the battery for a few minutes and then reconnect should turn the light off however the fact still remains that maintenance checkup should be in order as this is only a temporary fix as it will come on again until checked out { Auto-zone or Midas } will do a diagnostic check if the check engine light is on usually for free and tell you exactly what is the reason for it being on ..i hope this helps ...

Dec 06, 2009 | 2004 Subaru Forester

1 Answer

Subaru forester check engine light came on. Found oil low, added oil, check engine light still on. Is this normal? How does the light turn off?

no not nornal,you need to get it plugged in to a diagnostic computer to see which sensor set it off it means you have something that needs to be looked at,low oil could be a coincidence

Oct 29, 2009 | 2001 Subaru Forester

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