Question about 2004 Toyota Tacoma

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Code PO456 comes up on my 2004 Toyota Tacoma

Check engine light comes on with code PO456. How do I fix this

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 42 Answers

SOURCE: 2005 toyota tacoma check engine light

pull the E.F.I. fuse located under the hood on the drivers side, if there is more than 1 efi fuse pull them both along with the E.T.C.S. fuse (if there is one) for 1 minute or so. That should do it

Posted on Dec 23, 2008

  • 1114 Answers

SOURCE: Toyota Camry 2004 P0420

well that's if I'm not mistaken, catalyst system efficiency THRESHOLD!!! it is "bank" when your description code explanes bank 1 that is a O 2 sensor anything says BANK is a Oxygen sensor = O 2 sensor.what is it doing shutting off when eng warms up or sputtering or nothing really out of normal behavior? these switches will loose all communication with computer or get stuck in 1 of three ranges each range behave differently! in each range the deal with these are these switches are a part of maintenance usa @ hundred thousand km they should be change for emission efficiency and fuel consumption and vehicle performance usually after 1 is changed 9 times out of 10 shortly after the next bank will produce eng light and so on!! I usually change both while I'm at it you know pay me now or pay me again later but twice as much! well hope this helps you out good luck cheers happy new year.John, Toronto,Ontario

Posted on Jan 03, 2009

  • 21 Answers

SOURCE: 2004 Toyota 4Runner, Regarding The VSC TRAC and VSC OFF lights

Check your switches for the VSC, some get bumped on (due to their location) and some get stuck in the "on"position.

Posted on Aug 04, 2009

  • 2 Answers

SOURCE: 2006 Toyota RAV4, 3.5L V6 Check engine

I am having a multiple cylinder misfire on my 2006 Toyota RAV4 with the 3.5L V6. Every cylinder is reporting a mifire. Each cylinder has it's own coil. I highly doubt that all 6 coils went bad at once. Does anyone have any idea what my be causing this?? Is that the problem you two are having?

Posted on Mar 09, 2010

johnjohn2
  • 5763 Answers

SOURCE: i have a code P2238 toyota rav4 2004

Code # p2238 is for the air fuel sensor,you may have a bad sensor the one in the exhaust manifold.

Posted on Mar 31, 2010

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Common problems with check engine light on 2004 toyota tacoma


When you get any dash light that stays on after the engine starts,
you should be checking for codes that day, to find out what system
has a failure or fault,forget what's common & get the codes & diagnose them

There should not be any vehicles with a check engine light on & that vehicle being used a week later. Within a week all repairs need to be done, or you chance ruining the vehicle

Feb 06, 2013 | 2004 Toyota Tacoma

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My 2001 Toyota Tacoma's check engine light is on and it will not accelerate over 30 mph. What could this be?


There could be numerous components causing this issue. Bring your vehicle to a local autozone to have the chk engine code read. This will specify exactly what component has failed!!Post that code on fixya for further help!!

Dec 11, 2010 | 2004 Toyota Tacoma

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Hello i am trying to fix my check engine light and the light is on and the code says its my egr valve is not getting enough flow and causing the light to come on. also dont know where the reset button for...


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How do you turn off the check engine light on 2006 toyota tacoma


The easiest way is to disconnect the battery for about five minutes. This will reset the computer and clear any codes. Once you connect the battery you need to take the car out for a drive and let the computer relearn your driving habits. It you have something wrong with the car the check engine light will come on again. You will need to get the error code and fix the problem for the light to stay off permanently. Most car parts places will check your computer for error codes free.

Apr 09, 2010 | 2006 Toyota Tacoma

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My 2000 Tacoma 6 Cylinder engine warning light came on? Had oil changed yeasterday. All fluid levels are fine. What is happening? Safe to drive? Bjorn


I have a 2000 Tacoma Extra Cab Pre Runner. When I put on my camper shell my check engine light comes on. Oil levels and tires are fine. I took my shell off and light goes off. I hauled alot of wood and the light did not come on. Why would the camper shell be trip-en my light? Ofcourse I am gunna get the code checked next week.

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get it scanned they dont just stay on unless there is some problem

Jul 14, 2009 | 2008 Toyota Tacoma

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Check engine light code PO456


most likely the pressure sensor in the fuel tank for the evap system is defective.

Feb 25, 2009 | 2004 Jeep Wrangler

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