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I ordered in a Fuel Pressure Regulator Control Solenoid from Mazda to remedy my old code 25 that mazda themselves had detected (i ignored the engline light for months after the test), but my engine light came on again a day after the FPR control solenoid was installed and is still doing it, much more frequent than the code 25 days. I checked the codes with a paperclip and got CODE 24 "24 RHO2S inversion error" .

two longer blinks, blank, then 4 short blinks = 24 right?
unless it's listing Code 20 and Code 4 since i see it impossible to read any zeros since they don't blink

(what if mazda told me the wrong code, 25 instead of 24 in the first place ??)

now what

The online manual (if you hadnt checked already) lists the following causes

-Fuel Pressure
-Injection Fuel leakage
-Ignition System
-Air Leakage
-ECM


Since you had messed with FPR recently - that seems like a good place to start.....

RHO2S is the code for right hand 02 sensor. Replace it, its the rear one.

so i did read the blinks correctly?
Bleeeenk-Bleeeenk Blink-Blink-Blink-Blink

Yep that seems to be code 24.

The code for faulty o2 sensor is 23 - but it still is a good idea to change them if they are really old.

O2 Sensors: $275 each



none on ebay

sweet jesus

http://www.rockauto.com/catalog/x,carco ... ttype,5132
http://replacement.autopartswarehouse.c ... or&dp=true
http://replacement.autopartswarehouse.c ... or&dp=true
http://www.partsamerica.com/ProductList ... n%20Sensor

thanks aries ... i'll go with the denso ... wonder if there's any canadian online store equivalents

You can also use o2 sensors for the V6 ford probes. Then tend to run about $60-$80 each. Put a mazda sticker on the box and they double the price.

Tunes67

You can use the 4 wire ones that are made by NTK. I picked up 2 for $40 shipped.

FYI NTK is the o2 sensor line made by NGK.

should i replace the exhaust pipes that the new oxygen sensors will go into, or can i get by with just replacing the o2's on my 230 000 k car ? (just a new-part-with-old-part concern, know what i mean?)

and is still doing it

What exactly was your car doing because i might have the same problem? because ppl told me to replace my o2 sensors, i just havent gotten around to go to a Mazda dealer to get it checked out.

Dude, the Ecu is there to give the best ratio for fuel/air mix. For that it compares the unburnt fuel going out with the air+fuel coming in. For the air in, there's the MAF and for the air out there's the O2 sensors. Then Ecu defines what is the best amout of fuel going in the mix so it wouldn't be rich or lean.
What happens when O2 sensor is mad is the mixture will be too rich or too lean (never know) wich will make weird power and it's never good to the engine...

lol no, i knew all that, i ment how was your car behaving in the first place: what was the problem with it? ie: i have a bucking problem and ppl say it could be the o2 sensors...

well, i've always had bucking in low speeds (first and second gear, going through mall parking lots, etc).. i attributed the bucking to the transmission, but if someone says o2 sensors, then we'll see when i replace mine ... once again: should i replace the exhaust pipe sections that the o2 sensors insert into as well? (new-parts-with-old-part concern). it wud be great if someone answers this