Dawm CEL!!!!!! I have a P0037 Code on my P5

[Bebotech]

Dear Members,

can someone tell me if I should run a buy a dawm O2 sensor or is there another solution to this P0037 code? The car had a bad spark plug and I replaced all of them this week.

 

[hornsfan10609]

Yeah that's what it sounds like, it's possible the misfire threw some raw gasoline on the sensor or something.

 

[Bebotech]

Does it need to be replaced or is there anything else that could be done?

 

[hotcracker69]

looks like your protege has been having some issue lately.

preventive maint to prevent CEL.
replace spark plug on time
replace intake tube-tend to rip.
replace all fluid on time, PW steering, radiator fluid, oil, tranny.
replace o2 sensor every 100-120k regardless if it went bad.
clean EGR and idle valve every 60k.
replace spark plug cable every 100-150k
use different brand gas from time to time.

this will ensure a good running engine. i have 240k on mine now, never seen a CEL.

to answer your specific question, replace it. avoid the headache later

 

[Bebotech]

Thanks

 

[pcb]

Check your wiring and connectors,... they could be shorted or open circuit.

Check the resistance of the sensor,... It should be approx. 15.7 ohms.

 

[kms1990]

yea just replace usually those codes signal a dead or dying o2 sensor. as you know keep an eye on your coil packs, well i just replaced both mine as the price went down at autozone and they were $26 each lifetime warranty and since i work there i got my 20% off. i would replace those now (if you have the funds) as well just as preventative measures before they go out as they are known to do on this car. if one fails it could do nothing but leave you with a bad misfire to messing up a cat converter if too bad. better safe then sorry, and get denso or ngk (ntk) o2 sensors do not get bosch japanese cars like the denso or ntk ones better from my experience.

 

[tweety2300]

looks like your protege has been having some issue lately.

preventive maint to prevent CEL.
replace spark plug on time
replace intake tube-tend to rip.
replace all fluid on time, PW steering, radiator fluid, oil, tranny.
replace o2 sensor every 100-120k regardless if it went bad.
clean EGR and idle valve every 60k.
replace spark plug cable every 100-150k
use different brand gas from time to time.

this will ensure a good running engine. i have 240k on mine now, never seen a CEL.

to answer your specific question, replace it. avoid the headache later

Most people that drive 10 year old cars don't have money to unnecessarily replace stuff. Or Like my work car I give 0 s**** about till it breaks I've got a dry rotted cracked belt now, guess when it's getting replaced? Bad inner tie rod isn't getting replaced till it wears down the dry rotted tires, as I said 0 s**** given about it.

And no one is gona toss a $100 o2 sensor for no reason every 100k miles

 

[kms1990]

Most people that drive 10 year old cars don't have money to unnecessarily replace stuff. Or Like my work car I give 0 s**** about till it breaks I've got a dry rotted cracked belt now, guess when it's getting replaced? Bad inner tie rod isn't getting replaced till it wears down the dry rotted tires, as I said 0 s**** given about it.

And no one is gona toss a $100 o2 sensor for no reason every 100k miles

i never replace 02 sensors unless a code pops up for one, no reason to. i am a big car guy and maintain mine as best i can with my limited budget (wish i could afford a faster car or performance parts, 1 more year of college and i am on the road to finding a better job!) but if i were him, i would get new coils as they have gotten cheaper recently($51 for both lifetime warranty, well at the autozones near me)

i do recommend using denso or ntk o2 sensors it will be worth the extra $, as the bosch ones fail more often or give bad read outs. i change all my fluids and belts hose ect at regular intervals. replacing oil, trans fluid, brake fluid ect and hoses and belts can prevent more costly repairs down the road, and prevents you from being stranded with a broken down car or in your case with a bald tire then riding around on the spare, doing little things before they get bad will keep the big things from happening

and tweety, hotcracker was just suggesting good ways to keep the car running as long as possible, not that you have to do it all at once but just small things to do as you get the time or money most of which can be done by people with almost no car repair knowledge on the cheap.

 

[tweety2300]

It's not that I ignore maintenance. When my celica developed a miss at 305k I went ahead and replaced everything at once including the entire distributor. It gets a synthetic oil change once a month ( 200+ miles a day usually hard miles) but when you see someone on a public forum act like they're perfect at replacing every little thing it makes me look at it and laugh


Brake fluid gets changed with calipers on my cars ( my protege got 3 flushes within a year), I have a new belt and small tool kit in the trunk, I'll get to it eventually but unless it breaks before then it's not happening.I have a brand new set of tires and mine are far from bald. My tires rarely get down to wear marks before they're replaced as I use the old ones for drifting. There's a difference between not replacing stuff because you don't have time and endangering yourself and others because you're lazy or cheap

He named off stuff that no one replaces until needed. I haven't ever replaced power steering fluid on any car I've owned. Gear oil doesn't get done till it's time for a clutch or it gets knotchy.belts when they squeal or get dry rotted ( my brother has had a chunk in the one on his golf for over a year, we've had multiple bets about when it's going to break but it's due for a timing belt so it's finally getting replaced) pretty sure oil and timing belts are the only things that get replaced on time with my cars.

The cars are 10 years old and have had multiple owners do you really think all of the previous owners kept up with everything? The first 100k miles are the most important of a cars life. If you don't take care of them in that period don't expect them to last. I'm not saying throw maintenance out the window after that but it's not as important. That's why I like used cars for my work car. I really don't have to care as much about keeping up with stuff

 

[hotcracker69]

It's not that I ignore maintenance. When my celica developed a miss at 305k I went ahead and replaced everything at once including the entire distributor. It gets a synthetic oil change once a month ( 200+ miles a day usually hard miles) but when you see someone on a public forum act like they're perfect at replacing every little thing it makes me look at it and laugh


Brake fluid gets changed with calipers on my cars ( my protege got 3 flushes within a year), I have a new belt and small tool kit in the trunk, I'll get to it eventually but unless it breaks before then it's not happening.I have a brand new set of tires and mine are far from bald. My tires rarely get down to wear marks before they're replaced as I use the old ones for drifting. There's a difference between not replacing stuff because you don't have time and endangering yourself and others because you're lazy or cheap

He named off stuff that no one replaces until needed. I haven't ever replaced power steering fluid on any car I've owned. Gear oil doesn't get done till it's time for a clutch or it gets knotchy.belts when they squeal or get dry rotted ( my brother has had a chunk in the one on his golf for over a year, we've had multiple bets about when it's going to break but it's due for a timing belt so it's finally getting replaced) pretty sure oil and timing belts are the only things that get replaced on time with my cars.

The cars are 10 years old and have had multiple owners do you really think all of the previous owners kept up with everything? The first 100k miles are the most important of a cars life. If you don't take care of them in that period don't expect them to last. I'm not saying throw maintenance out the window after that but it's not as important. That's why I like used cars for my work car. I really don't have to care as much about keeping up with stuff

I cant afford breaking down in the freeway, the tow truck will cost me more. not to mention the mayor traffic i will cost for everyone if i break down the in the left lane. i could lose even more if i dont show up to work on time. just because i did not think some item needed it replacing. rather do it before/early and when you have time, you never know the future, never know when you need to make a sudden trip that is important. living in cali, and only having one car, i need to lower the risk as must as i can.

i can replace power steering fluid easily. suck and drop new fluid, no ramp and jack need. can you imagine the mayor work needed the rack and pinion broke?

 

[tweety2300]

Nothing nentioned in your list will cause a break down except a serpentine belt. It takes 5 minutes to change a tire. 2 people can leave a car sitting on cinder blocks in 7 minutes ( did it as a joke)

Break down in the left lane? If you're too incompetent of a driver to be able to coast off into the breakdown lane you should stick to public transportation. Not trying to be a dick, just saying

I have 3 cars so I can't say anything about a sudden trip

Old power steering fluid won't make your rack and pinion "break" at most it will make the ps pump squeal.

 

[Bebotech]

Ok, if the O2 sensor is the item that I have to replace can someone tell me how to replace it? I have heard that they are a PITA to change.

pcb, you mentioned that it may be an electrical problem, I would really like to hope that this is not the case, electrical problems freak me out. What is the worse that could happen and how can it be fixed?

 

[pcb]

I have heard that they are a PITA to change.

The sensors tend to seize up,... It can help a lot to heat up your exhaust before trying to unscrew it,... just be careful of burning yourself.

pcb, you mentioned that it may be an electrical problem,.. What is the worse that could happen and how can it be fixed?

I'm talking about the real simple bad connection kinda stuff,... just pull the wire off your o2 sensor to check for a bad connection,... either corrosion or loosness,...then check the resistance of the sensor,... if its out of spec you know for sure its bad and needs replacing.

It would suck to spend a hundred bucks on a sensor just to find out it was a bad connection (although you've probably got about a 90 percent chance that it is a bad sensor just nice to know for sure).

You can also test the wire leading to the sensor for being shorted or broken here's the service manual page number to help get you through it. (nothing too complicated just a couple of resistance tests)

01-02B-22

 

[Bebotech]

Ok, when checking the resistance on the sensor could you please elaborate a bit more on how to do this. I am new to this stuff and you seem to have lots of knowledge.

 

[Bebotech]

Sorry pcb I do not have the owners manual.

 

[pcb]

You can download the factory service manual (fsm),... Here's a link:

http://www.mazdas247.com/forum/showthread.php?123841062-repair-mannual

 

[pcb]

Ok, when checking the resistance on the sensor could you please elaborate a bit more on how to do this. I am new to this stuff and you seem to have lots of knowledge.

Unplug the connector and test the resistance between terminals C&D that goes to the sensor,... there's only two terminals in the plug.

My computer died so I'm doing all this with my phone,... Big PITA,...

 

[Bebotech]

Ok, so basically every test will be done right on the connectors, correct?

 

[hotcracker69]

you can also borrow a special tool to remove the o2 sensor from the auto part store. it has a special grove for the cable