Question about 2001 Mitsubishi Galant

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Code po157 what does it mean and how do i fix it?

I have an 2001 galant, the check engine light is on and when put on an diagnostic reader the code is po157. what exactly does this code mean and how do i fix it?? thanks

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  • Dzknutz007 May 18, 2009

    dsacco86 thanks alot i must of had a major brain fart or something... i should of thought of that and thanks again for your help..much appreciated!!!!



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P0157 Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2)

I would try replacing the Oxygen sensor, then clear the code.

The O2 sensor would be the after the catalytic converter ( sensor 2) on the exhaust pipe of the number 2 cylinder uses ( bank 2).

Posted on May 18, 2009

  • donte74 Oct 20, 2010

    im having the same problem.. I change all of my sensors and the code is still coming on what can i do next



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The check engine code p0505 showed before so we changed the iac along with the throttle body, had the alternator checked it still good, but now the light stays on with that code. what should we do? we

It may be fixed & it may not be

Who did what,how & why

A code reader is what you need if your
working on your own car
$60.00 is nothing for that,use it to clear
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Will an obd II reader come out with codes for problems even if the check engine light isn't on?

I think you have a defective fuel pump pressure check valve here. If you don't have a check engine light on you will not have any codes.

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1 Answer

How do I reset the Check Engine Soon light in my 2003 Mitsubishi Galant?

You need a code reader to do this, most Auto parts stores will check the error code for you, but most will not reset it until you buy the necessary part to fix the problem. You can also purchase a code reader and reset it yourself. Autozone has an inexpensive one for about $60. If the error code keeps coming back you should probably think about fixing the underlying cause.

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I have a 2000 chevrolet truck, i had the

this is an oxygen sensor code, it has nothing to do with the oil pressure

Jan 29, 2010 | 2001 Mitsubishi Galant

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How to check the trouble codes on a 2001 chrysler concorde 2 7L

I assume you are asking about the "check engine" diagonstic codes.

You can check the codes yourself by using the key and ignition switch. With the engine off, put the key in the ignition and turn it ON-OFF-ON-OFF-ON -- do not turn to the extreme right "start engine" positon, but to the last click just before the start position.
You will then see a code list read out where the odometer (mileage) usually displays. It will start with dashes in the readout "-------", then each diagnostic code will appear in sequence like P1684, P0700, and then the word "done" after all of the codes have been displayed.

One word of warning -- I have found that sometimes all of the diagnostic codes do not display with this method, so it would be best to also check the codes using an electronic diagnostic code reader. You can do this for free yourself as explained below.

Go to your nearest "national chain -- do it yourself" auto parts store such as Auto Zone or Advance Auto. Ask to borrow the "engine code reader diagnostic tool" -- you will have to give them your driver's license to borrow it. Then, in the parking lot, check the diagnostic codes yourself.

Turn the car key to the "accessory position" -- i.e., not started, but with the accessories on. Power on the diagnostic tool. Plug the attached pin connector into the Chrysler diagnostic socket located just under the dasboard below the ignition switch. Press the "read codes" button on the diagnostic tool -- you will see a diagnostic code and a brief message about what it means. Keep pressing the "next" button until you have read all of the codes.

P.S. Don't forget to get your driver's license back when you return the diagnostic tool!

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It means there is a fault stored in the computer memory that needs to be identified and fixed.
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The code reader can then be used to reset the check engine light and turn it off.

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