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Honda pilot code PO420

My 2008 Honda Pilot has the "check engine" light on, the code is PO420. Is this safe to continue driving for a few days, or do I need to have this checked out immediately?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

johnjohn2
  • 5763 Answers

SOURCE: radio error Honda Pilot code

the code should be with your owners manualy its on a card the size of a business card.there will be # s on it, make sure you follow directions in manualy on how to enter code,also you might be able to call dealer, give them your cars vin # and they sometimes will give u a code.good luck.

Posted on Oct 02, 2009

  • 2841 Answers

SOURCE: fix honda pilot 2005 fan relay

It can be the A/C switch causing this, but not likely. Make sure to turn the A/C off when you stop. If it still does it after turning the A/C off, replace the thermal relay.

Posted on Oct 04, 2009

  • 17 Answers

SOURCE: 03 Honda Pilot Check Engine Light

yes reset by removing fuse or disconnecting battery make sure you have radio code if disconnecting battery. Problem may be oxy sensor in exhaust.

Posted on Jan 21, 2010

  • 3 Answers

SOURCE: my 2003 honda pilot is difficult to shift into

There could be a number of issues with a Honda Pilot not shifting into drive. In fact, I had this problem with my 2003 Honda Pilot two weeks ago and had to replace my transmission. More than 100,000 2003 Honda Pilots were recalled in 2004 because of a transmission problem -- was your Honda part of that recall? If so, Honda may help you with some of the costs.

If the problem is not with the transmission, I suggest making sure that your steering column is not locked. You will also notice that on the top of the steering column is a small plate. If you remove the plate and press down with a coin, you can unlock the steering column, enabling you to shift into drive.

Hopefully these solutions will help...but be sure to see your auto service shop for more details on your situation.

Posted on Jun 03, 2010

rickyrt441
  • 4399 Answers

SOURCE: 2001 honda civic lx -

Thanks for choosing FixYa and welcome to the site. I would advise you to have your transmission checked as soon as you can. You might need to check your fluid and change your transmission filter first to see if that helps. But, more then likely, your transmission will need worked on since it slipped. That may be just the beginning.

Posted on Apr 17, 2011

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2 Answers

Why won't it start?


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Jan 01, 2016 | 2005 Honda Pilot

1 Answer

How do i reset my manint req's light after an oil change on a 2003 Honda pilot


Reset oil service light Honda Pilot. From years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012.
How do you reset oil service light Honda Pilot. From years: 2003, 2004, 2005.
  1. Turn off the engine. Press and hold the SELECT/RESET button in the instrument panel and turn the ignition switch to run (one position before starting).
  2. Hold the button for at least 10 seconds, until the indicator resets.
  3. Turn the ignition off and then start the engine to verify the indicator has been reset.
How to reset oil service light Honda Pilot. From years: 2006, 2007, 2008, 2009, 2010, 2011, 2012.
Resetting the Engine Oil Life Display if maintenance service is done by someone other than your dealer, reset the maintenance minder as
follows:
  1. Turn the ignition switch to the ON (II) position.
  2. Press the select/reset knob repeatedly until the engine oil life is displayed.
  3. Press the select/reset knob for about 10 seconds. The engine oil life and the maintenance item code(s) will blink.
  4. Press the select/reset knob for another 5 seconds. The maintenance item code(s) will disappear, and the engine oil life will reset to 100.
All information is taken from the Honda Pilot owners manual.

Mar 09, 2015 | 2003 Honda Pilot

1 Answer

After driving my 2007 honda pilot for about 25 to 30 miles the engine light comes on then VSA light comes on then I lose power.SO I shut it off the car & have to wait a while then I can drive a li


Why did you not leave the vehicle at a repair shop or dealer
to be properly diagnosed & repaired

Any time you get any dash light on after the motor is running I
check for codes that day & get on with the required checking
& resolving within days or use another vehicle

You should stop using a vehicle with check lights & faults
& forget the free codes checks at the parts stores


Always use a professional scan tool & look at all data real time
generic & enhanced something a code read won't do & go for
a long road test with the scan along

Cylinder misfires will ruin an expensive exhaust converter
as will vacuum leaks,leaking injectors etc.

Today's vehicles need to be 100% or parked or you create
problems,do damage,run up your repair costs & shorten the
life of the vehicle all thanks to the Govt Emission non-sense

Mar 10, 2014 | 2007 Honda Pilot

1 Answer

What does it mean when a check engine light is on a 03 honda pilot mean?


Hi, your computer has detected a fault. If the car is running, drive it to your local auto parts chain and ask for a free OBD 2 scan. Write down the trouble code and send it to us for repair advice. The problem may be minor, but we cannot tell for sure without the trouble code.
Thanks for using FixYa.

Jan 12, 2011 | 2003 Honda Pilot

2 Answers

@004 Pilot the check engine light came on after my daughter bought gas. Autozone code was p1456. Car seems to be running fine.


2004 Honda Pilot engine light came on this morning. Last bought gas 5 days ago. Auto Zone checked and found code P1456, emission control system leak detected (fuel tank system)
Four options;
1) Loose fuel cap
2) Vapor canister saturated
3) Failed vent solanoid
4) Failed purge solenoid

Thanks.

Aug 14, 2010 | Honda Pilot Cars & Trucks

1 Answer

2006 Honda Pilot. JUST started hesitating when push gas, Lunges one second later. Takes longer cranking. Both only in last 2 days. Engine light too. Codes are P0301, P0302, P0303...P0306, (each...


SOUND LIKE PROBLEM IS EGR VALVE FAILURE.CHECK TO SEE IF EGR VALVE IS GETTING VACUUM. IF ALL IS GOOD EGR VALVE INTAKE OR EXHAUST MANIFOLD PASSAGES ARE RESTRICTED OR THE EGR VALVE IS DEFECTIVE.

Jul 05, 2010 | 2006 Honda Pilot

1 Answer

Blinking green drive light


There is some problem with your transmission, get an engine analyser then you can see the error code i.e. telling the problem faced.

Apr 06, 2010 | 2005 Honda Pilot

2 Answers

03 Honda Pilot Check Engine Light


yes reset by removing fuse or disconnecting battery make sure you have radio code if disconnecting battery. Problem may be oxy sensor in exhaust.

Jan 21, 2010 | 2003 Honda Pilot

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