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Old 06-28-2005, 01:54 AM   #1
svek
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Default front o2 sensor and stuff...

so apparantly my front o2 sensor is bad. my questions are:

-what will it cost me to get this fixed by a mechanic
-what will it cost me if i buy the sensor and do it myself
-if i do it myself how hard is it/what tools do i need to do it


after doing a search i found:

o2 sensor stuff for wrx
this guy who MAY have had the same CEL code as me



edit: i have a p1130 code, he had a p1133
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Old 06-28-2005, 02:04 AM   #2
chri3
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Is it the primary O2 sensor or secondary? My secondary went but that's not an issue...


It's probably pretty cheap.....i think you just need a generic 4-wire O2 sensor, a wrench, and some way to splice the wires. Maybe $50-100.
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Old 06-28-2005, 12:46 PM   #3
Robin2
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do it yourself..... Once the car was on jacks.... unplugged the wire and used a 22mm wrench remove old one /install new one..... used some antiseize on the threads...

Easy job overall.... but my heat sheild isn't there so that could be more restrictive too....

I just used a NGK 02 sensor and it was a straight swap.... no splicing required....

Robin
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Old 06-28-2005, 12:51 PM   #4
Jimpreza
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yea i have the p1133 code and ordered the bosch o2 sensor from autozone for 69.95...its the sensor right before the catalytic...a mechanic told me about 60.00 to install it
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Old 06-30-2005, 02:14 AM   #5
svek
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just to clarify. p1130 is Front oxygen sensor circuit malfunction (open circuit). so that means a wire broke right? i wonder if i could find out which is broken and maybe replace the wire.
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Old 06-30-2005, 09:41 AM   #6
GuyLR
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Quote:
Originally Posted by svek
just to clarify. p1130 is Front oxygen sensor circuit malfunction (open circuit). so that means a wire broke right? i wonder if i could find out which is broken and maybe replace the wire.
Maybe but not necessarily. The wires on mine were perfect so the problem was in the sensor itself.
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Old 06-30-2005, 09:49 AM   #7
AJ711
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It could be a wire, and it could be something with the sensor iteslf. Best bet would be to just replace the sensor and go from there. Now, if you still get the CEL, bring it to a dealer and let them handle the wiring rat's nest to find the issue.

I picked up a generic Bosch sensor when my front started going bad. (running really rich, EGT's were lower at WOT, gas mileage sucked) Got the car up on jacks, sprayed the bad sensor down with WD-40, let it sit for a bit (swapped front rims/tires from winter ---> summer) and went at it with my O2 sensor tool (special socket with cutout for wires) and socket wrench. After I removed the sensor, I spliced the connecter onto the new sensor. Here you have to be close to perfect. Try and get the new sensor wire and connector wire to be the same length as the old sensor.

Once the splicing is done, get back under the car, put plenty of anti-sieze on the threads, put new sensor back in exhaust, connect the two plugs, start car and make sure it runs.

May want to remove the negative battery wire as well to reset the ECU so it learns around the new sensor as well. It can't hurt.

AJ
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Old 06-30-2005, 01:28 PM   #8
John2.5RS
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Exclamation Caution!

If you have never spliced automotive wiring I would not recommend your front O2 sensor as first "project". It's easy to do (If you've done this type of thing before) but it's also easy to screw up. The front O2 is one of the most important part in your EFI engine management. I'm a tech and I've seen alot of dangerous wiring jobs that people have brought in to the dealership to get fixed. If I were you, I would buy a O2 sensor that is made for your car and do it yourself. Paying someone $60 to do it is silly. That's amost as much as the part. It will probably take you more time to get the car on jackstands than to replace the sensor. good luck.
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Old 06-30-2005, 01:38 PM   #9
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Lightbulb One more thing...

You really should reset your ECM after you replace the sensor. Make sure you have a good tank of 87 octane(anything higher is a waste on USDM suby NA engines). Disconect the Positive cables from the battery for no less that 30min. Reconnect the positive cable(s) to the battery. Start the engine with all lights, radio, and other accesories off. Let the engine run until you hear the fans cycle several times (3-6 times should be good). Then drive it with varying speeds, loads, & throttle positions. After a tank or two it should be up to par and getting better gas mileage!
You don't have to do all the driving at one shot, of course.
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Old 07-01-2005, 01:19 AM   #10
svek
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alright thanks guys. i am not going to be splicing wires because i am an IDIOT when it comes to stuff like that.
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