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Old 03-21-2014, 03:05 PM   #1
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Default 04 Sentra SE-r Spec-V System too rich bank 1

My sentra has a cat and 02 delete on the second 02. borla bolt on and nismo cold air intake with k&n filter. i keep getting this code for system too rich bank 1. i run iridium plugs in it. just replaced the vent control valve and another coil pack. about every other month another coil goes bad. it isnt cheap at 80 a pop. but for some reason i keep getting these check engine lights. also i had to replace the throttle body about 6-8 months ago as this also seems to be a common problem with these cars. kept pulling an idle speed too low. it has the 6spd man trans. any help would be appreciated
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Old 03-21-2014, 03:09 PM   #2
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Are they supposed to run well with the cat and 2nd o2 sensor removed?
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Old 03-21-2014, 07:01 PM   #3
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it runs awesome since i replaced the coil pack. it just seems to burn up coils on a regular basis. we've owned the car for a year. its really a very surprising car. just about every few months it seems to start backfiring and spitting. i just didnt know if there was s solution to this.
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Old 03-21-2014, 07:04 PM   #4
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btw there is a resistor in place for the delete so the comp still gets a reading on the O2
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Old 03-21-2014, 07:12 PM   #5
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Maybe the resistor has failed and is giving a different reading to the ecm than it was designed to do and the ECM is throwing more fuel at it?
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Old 03-22-2014, 07:29 PM   #6
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that is possible. ill look into it ty
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Old 03-24-2014, 09:50 PM   #7
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try oem plugs...
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Old 03-26-2014, 07:07 PM   #8
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whats oem? platinums? i figured the iridium would burn at a higher heat and actually make it run better with all the upgrades.
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Old 03-27-2014, 05:38 PM   #9
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original equipment, try Nissan pt# 22401-5M015
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Old 05-04-2014, 03:35 PM   #10
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Default O2 s1 b2 high voltage

this seems to make me think the 02 delete has went bad. the car cuts off when you shift out of gear to come to a stop. it was doing it 2-4 times a day now it does it every time you stop. can anyone help with this issue. im having a problem locating the delete resistor they put in there. i imagine it has been discontinued.
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