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Toyota mr2 roadster 2001 engine light on code po141 oxygen sens

Toyota mr2 roadster 2001 engine light on code reads p 0141 oxygen sensor fault bank 1 sensor 2 .there are 3 sensors on exhaust 2 at top positioned left and right prior to cat and 1 at bottom after cat which one should i change assume top right hand one.

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Bank 1 will be whichever side cylinder 1 of your engine is and bank 2 will be the opposite side. It's named bank 1 and bank 2 so that no matter how the engine is laid out, bank 1 is always on the same side as cylinder 1. I cannot say whether the right hand or the left hand one will be bank 1 as I do not know where your cylinder 1 is. The garage should know

Posted on Sep 08, 2009

  • oyster4 Nov 05, 2010

    engine is a 4 cil there is only 1 bank, is sensor # 2 on the left or right side of the exhaust manifold looking from the rear of the car (car is a mid engine with exhaust manifold facing the rear)

  •  PEDRO
    PEDRO Mar 11, 2013

    i have recently had 2 sensors changed and now after 3 months the management light has come on on dash board. a mobile mechanic has said lamba sensor again. help me

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We have a Ford Aerostar model 2000. We want to know what these errors are: PO141; PO171; PO174


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Fuel sensors work in the hottest part of the exhaust and are difficult to remove after a period of time. Many mechanics apply a small amount of never seize to the threads to assist in replacement and future removal. However this affects the grounding of the sensor and can cause fault readings. Ask the mechanic if he did that and follow you idea that the sensors may aftermarket and not suitable for yoyr car

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2002 MR2 fuel system too rich bank 1 and bank 2


Peter. The dealer did diagnose the problem. They said the car needed all 3 oxygen sensors replaced. They were replaced and the car is now returning codes p0172 and p0175 which are the only 2 codes coming up when the check engine light came on. My question is if the dealer sold me the incorrect oxygen sensors could this cause the computer to incorrectly set the p0172 and p0175 rich fuel mixture codes. There are no other codes coming up. My plan at this point is to check and clean the MAF, check my fuel pressure, and also the TPS but I did not want to waste my time if it could possibly be that the new oxygen sensors where the problem. Any help would be appreciated.

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How many oxygen sensors in a 2001 chrysler sebring 3.0


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Fig. Heated Oxygen (HO2S) location (sensor 1)-2.4L engine

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Fig. Heated Oxygen (HO2S) location (sensor 2)-2.4L engine

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Fig. Heated Oxygen (HO2S) location (bank 1, sensor 2) (bank 2, sensor 2)-2.7L engine

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Fig. Heated Oxygen (HO2S) location (bank 2, sensor 1)-2.7L engine

I hope help you with this (rated this help). Good luck.

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Engine light on code po141 oxygen sens bank 1 sens 2


bank 1 will be whichever side cylinder 1 of your engine is and bank 2 will be the opposite side. It's named bank 1 and bank 2 so that no matter how the engine is laid out, bank 1 is always on the same side as cylinder 1. I cannot say whether the right hand or the left hand one will be bank 1 as I do not know where your cylinder 1 is. The garage should know


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P1100
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