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ep3 check enginie light

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Old 06-30-2009, 07:55 PM
  #11  
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Default Re: ep3 check enginie light

Originally Posted by stock ford
i appreciate all the advice fellas. i guess i'm going to have to start looking for an o2 sensor. easy to install??
The install is usually cake, you'll need an O2 sensor socket which is pretty cheap but other than that you should be good. Most of the time O2 sensors have anti-seize on them from the factory so they won't seize (obviously), and you'd be wise to put some on the new one too (if it doesn't come that way already).

Accessing the connector is usually pretty straightforward, but I have no idea what it's like in your car. Don't be afraid though, this whole process will probably be one of the easier repairs you've done to your car.
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Old 06-30-2009, 08:04 PM
  #12  
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Default Re: ep3 check enginie light

Originally Posted by stock ford
great car only has 60*** miles. are you sure that is the upstream. hate to pay all that money for nothing
The primary O2 sensor is the upstream one usually, so yeah. You've checked all of the things we suggested first before replacing the O2 sensor, right???
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Old 07-01-2009, 08:35 PM
  #13  
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Default Re: ep3 check enginie light

going to get a multimeter tommorow.
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Old 07-01-2009, 08:40 PM
  #14  
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Default Re: ep3 check enginie light

my ep3 does the same thing. the CEL went on, i got autozone to check it, "bank 1, sensor 1 malfunction"

the light stays on 90% of the time

sometimes it goes off on its own, noticably when i fill up with some good gas.

but mostly ALWAYS goes off if i'm driving in the rain....

i been wantin to swap out my o2 sensor to get my better mpg's back, BUT i have a rsx-s midpipe installed, which is where i'm guessing the sensor is, and idk if i need to get an ep3 sensor or a rsx-s sensor...

help is needed. thanks
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Old 07-07-2009, 04:32 PM
  #15  
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Default Re: ep3 check enginie light

Originally Posted by 03Si757
I have a EP, first thing I would recheck the connection to the primary. Make sure all the wires are in the harness connectors fully. Also check the wires running up the firewall. Theres a little plate looking thing the wires connect to, id say check them there aswell. Also check and make sure there sealing right. May need to clean them. ANother thing you can check is the AMP fuse under the dash. I think its fuse #14.

To get rid of the CEL, just pull the ECU fuse under the hood for about 30 seconds, I cant remember the number, but its a 20 amp fuse.
Fuse 15 my EP is garbage too... and only has about 50,000 on the body.
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