I have Toyota 4 runner 1999 limited and I find eginen light on and find 2 code 1-P0420 2-P0420(pd) Could you tell me what they main

Toyota is great they try to make things fool proof. taken from http://www.ask.com/answers/72103781/firing-order-for-a-1999-toyota-4runner-3-4 : The firing order for a 1999 Toyota 4 runner 3.4l is 1-2-3-4-5-6. When standing in front to your car, the left bank of the cylinders are numbered 1, 3 and 5 while on the right they are numbered 2, 4 and 6.


1,2,3,4,5,6 - Good job Toyota!

P0442 Evaporative Emission Control System Leak Detected Small Leak
http://engine-codes.com/p0442.html


P0420 Catalyst System Efficiency Below Threshold Bank 1
http://engine-codes.com/p0420.html

Read more: http://engine-codes.com/search_codes.php?var=p0420#ixzz26yDZiDgG

Hi and welcome to FixYa!

Code p0420 means Catalyst System Efficiency Below Threshold (Bank 1). This will surely needs attention to resolve the problem.

Hope this helps and thank you for using FixYa! Have a good one!

For the 1999 Toyota 4Runner 3.4L DOHC V6:
Four Cams??

Firing Order:
1-2-3-4-5-6

Cylinders:
.......(back).......
|..5..|........|..6..|
|..3..|........|..4..|
|..1..|........|..2..|
.......(front)

Let me now if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

Sounds like the starter is getting ready to go out. I'd look at being ready to replace it soon. If it is a stick shift transmission car, you can PUSH start the car, but you probably want to get it done before this happens. This is what mine did, click, click, start, over a period of about 2 weeks before it finally went out. Replaced it, starts first time every time now.

Hope this helps.

1-4
2-5
3-6

25 means the thing is saying it's running lean. all the check areas, however, are not for the home mechanic to play with.

You need to reset the light with a scan tool, the same one you used to read the code in the first place.

http://www.obd-codes.com/faq/reset_obd_codes.php