Check engine light issue

[WhiteyMX5]

i have an 06 NC,2.0 litre. CEL recently went on had it read , some generic code ,had it reset . Well its back on again. So ..only out of convenience took it to tires plus.paid fir full diagnostic scan. I watched it passed all tests. But it was reading tgat ghe throttle was at 32 %....no foot on gas, engine NOT racing.

Sothey said maybe a newthrottle body!..which is a $659.99 part. .I said no ghanks they reset the light. Itwas back on wighin 20 mins of driving.Now car runs fine. But when im stopped ,clutch in...normal idle .. I put it in gear(clutch still in).....and the idle goes up 3 to 5 hundred revs?.It doesnt matter what gear.



im lost ..looking for some good advice, and hoping i dont need $800 worth of work....not NOW!....

Whitey MX5

[maharaj]

tps sensor?

[WhiteyMX5]

a possibility?........i just have no clue what so ever....
is that an
expensive part?.........any way to test it?

thanks for reply

[kung fu jesus]

Hard to help you without the actual code it threw.

[WhiteyMX5]

the first time it did it .it said coolant too not!....temp was perfect.....i will go try and get it read again somewhere for free maybe today....i will write the latest code down......im baffled...but in everyones opinion....not the throttle body?!..im not in the position to fix that!(800 bucks)

[WhiteyMX5]

typo........coolant too HOT......which it wasnt.

car is running great also..........so very frustrating.car is well maintained.

[kung fu jesus]

Maybe a bad sensor, but knowing the code would still be helpful.

[WhiteyMX5]

just paid another 40 bucks....at a local race shop.........they at least got a code.......po507......something about duty cycle/throttle position....?

they said keepin mind this coild be a sympton not a cause.......all these professionals and all i am getting is guess work,and an emptying wallet..........very frustrating and stressful.

[maharaj]

Looking like TPS sensor with that code. $40! There is no Advanced or Zone close to you? They do it for free. I am sure one of the more experienced guys will chime in.

[Martin]

Also O'Reilly's should let you borrow a scanner so you can do it yourself for free. But I don't know if that chain is in your area.

[WhiteyMX5]

is the throttle position sensor something icould get at a zone or oghers? Where is this sensor located?

[kung fu jesus]

Is this car a manual transmission?

Read a few instances of this happening on a couple of Mazda 3s and an NB. Replacing the clutch switch (not the interlock switch) solved the issue.

[tsingson]

Don't know how close this is to you but Harbor Freight Tools has cheap scanners as well as your local Pep Boys, Autozone, etc....

MELBOURNE, FL #00133 (2.4 mi)
1964 N. WICKHAM ROAD
MELBOURNE,FL 32935
321-752-9203
Store hours:
M-F 8:00AM-9:00PM
SAT 8:00AM-9:00PM
SUN 9:00AM-6:00PM

Scanners are great things to have when working on your own cars.

[kung fu jesus]

http://www.jimellismazdaparts.com/images/parts/mazda/fullsize/2G75661.jpg
If that above diagnosis is correct, it looks like either 66-4D0 or 18-660B


Look here for more info:
http://www.jimellismazdaparts.com/showAssembly.aspx?ukey_assembly=305589&ukey_product=1872874

[WhiteyMX5]

yes, 5 speed manual 2.0 litre 06 NC........clutch switch huh......hmmm

[WhiteyMX5]

really appreciate the info man......you believe its that clutch switch moreso than the throttle position sensor?

[WhiteyMX5]

yes! ..i was at that damn harbor freight this afternoon...was getting something else...was so damn busy i had to leave ,was in a hurry ... Appreciate The lookup on those locations....

[maharaj]

Is this car a manual transmission?

Read a few instances of this happening on a couple of Mazda 3s and an NB. Replacing the clutch switch (not the interlock switch) solved the issue.

Yea, I'd lean more towards Kung Fu's answer because it is happening in other Mazdas AND he is more familar with these than I am.

[WhiteyMX5]

well i appreciate your input just as well maharaj.....much props....and kungfu... I may have more questions.this is way over my abilities...but mzybe up forthe challenge if its a simple fix

[kung fu jesus]

Never owned an NC. Search that engine code and Mazda Miata on Google and start reading.

[WhiteyMX5]

read something about idle speed control motor near the ghrottle body?..........now im really confused.......lol....3-4 different choices.....ugggghhh!

[kung fu jesus]

You have the engine code, you have the make, model and engine. Google that and you will see alot of items show up in different message boards. Start reading through them. When you start finding similar issues, look for the solutions, if they bothered to post them up. It narrows down your options for solving the problem rather than just throwing parts at it. Or, just leave it at the dealership and let them milk off you.

[WhiteyMX5]

You have the engine code, you have the make, model and engine. Google that and you will see alot of items show up in different message boards. Start reading through them. When you start finding similar issues, look for the solutions, if they bothered to post them up. It narrows down your options for solving the problem rather than just throwing parts at it. Or, just leave it at the dealership and let them milk off you.


I appreciate your advice and assistance.......i am a novice ...but am up for a challenge....i will do more research.....if i have more questions may i bother you again?


WhiteyMX5