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You can "cheat" clear it by using a OBDII scanner that allows you to erase it, or simply disconnect the battery and wait for a few minutes.
P0402 is very common for 1999-2000 Miatas. The most common reason is because the engines run very rich and tends to crud up the EGR ports. This is usually fixed by clearing out the Intake Manifold EGR port, and the EGR valve itself:
Cleaning the Intake Manifold Port:
http://miata.net/garage/manifold/index.html
Cleaning the EGR Valve:
http://sites.Google.com/site/redcapsmiata/tutorials/egr-valve
What else can I help you with?
What is Mazda code na351?
That is a Mazda MX-5 Miata.
What does air bag code 21 on a Mazda 6 mean?
mazda miata air bag code 21
How do you fix a transmission code p1744 on a 2000 Mazda 626?
i have a 2000 mazda 626 with a 1744 code. i was able to pull the code but my scanner wont tell me what it is for. what does this code represent and how do i fix it?
What is engine check code P0705 on a 99 Mazda Miata?
Trouble code P0705 means:Transmission range sensor circuit malfunction (PRNDL input)
How do you reset the low tire pressure light on the 2006 Mazda Miata?
Just plug a code reader into the slot (somewhere under driver side dashboard) and it will clear the code for you and the indicator light will go away......and keep adequate pressure in your tires for future reference.
What is 1999 Mazda Miata check engine light code P0421?
Trouble code P0421 means: Catalyst Efficiency Below Normal (Bank 1)
What is engine check code P1797 on a 97 Mazda Miata?
Trouble code P1797 means: Clutch Pedal Position Switch/Neutral Switch Circuit
How do you reset the code on 1993 Mazda miata CD player?
generally there is a card or something that's in the owners book with the # for it.. otherwise go by the Mazda dealership they usually have a universal that can solve the problem
Where can one purchase a Mazda MX5 hardtop?
The Mazda MX5 hardtop is one of the Mazda Miata models. It is a sporty car that comes with both a hard or soft top convertible option. You can purchase either model at your local Mazda dealer. The Mazda website has a zip code feature that allows you to search for the closest Mazda dealer.
On your 2000 Mazda Millenia you have a check engine code of?
To diagnose the check engine code on your 2000 Mazda Millenia, you'll need to retrieve the specific code using an OBD-II scanner. Common issues for that model could range from problems with the oxygen sensors, catalytic converter, or ignition system. Once you have the code, you can research the exact issue and decide whether to address it yourself or seek professional help. Always ensure to clear the code after repairs and monitor for any reoccurrence.
What does a code P0420 on Mazda 626 2000 model?
Trouble code P0420 means:Catalyst system efficiency below threshold
What code p1105 in a 99 Mazda millenia 2.5 is?
typemake, model, code into your computer .i have a list of codes and there is no p1105 code, clear your machine and try again
