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HELP - INSTALLLED CAI - ERROR CODE 0503- Front Right Heated O2 sensor

Old Jun 17, 2002 | 08:08 AM
  #1  
danw2481's Avatar
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HELP - INSTALLLED CAI - ERROR CODE 0503- Front Right Heated O2 sensor

WHAT DOES THIS MEAN?
Old Jun 17, 2002 | 08:32 AM
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Go to www.courtesyparts.com type "oxygen sensor" in the "search" box. They have a pic showing where they are. Its behind yor right front wheel. Trace it up to the motor on top. We just changed the right front one on my 95 maxima, very easy to change. But after we changed that one, the light came back on and it was 0707, the rear O2 Sensor. We bought the right front O2 Sensor(made by Bosch) at AutoZone for $77. At my autozone here, that is the only one they carried, said it was the same one for all 3 sensors, not true. My dealers price was $139 for the rear, I ordered it from www.thepartsbin.com for $82. I hope I was of some help!
Old Jun 17, 2002 | 12:45 PM
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Originally posted by KerryW
Go to www.courtesyparts.com type "oxygen sensor" in the "search" box. They have a pic showing where they are. Its behind yor right front wheel. Trace it up to the motor on top. We just changed the right front one on my 95 maxima, very easy to change. But after we changed that one, the light came back on and it was 0707, the rear O2 Sensor. We bought the right front O2 Sensor(made by Bosch) at AutoZone for $77. At my autozone here, that is the only one they carried, said it was the same one for all 3 sensors, not true. My dealers price was $139 for the rear, I ordered it from www.thepartsbin.com for $82. I hope I was of some help!
My autozone had two different sensors for front and back. I just replaced both and they were 77.00 each but each had diff part numbers.
Old Jun 17, 2002 | 02:03 PM
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My friend put an intake on his max and had the same issue. He changed em and cleared the code and hasnt had a problem since.
Old Jun 17, 2002 | 03:08 PM
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i just reset my ecu and the check engine light went away and hasnt come back yet and i drove over 100 miles today - anythoughts - was it just a mess up or do u think there actually is somthing wrong with my sensor?
Old Jun 18, 2002 | 12:11 AM
  #6  
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i got the code for the o2 sensor and kept on reseting the light. stayed off first for bout 500 miles then bout 300 and then 200 so odds are itll come back on
Old Jun 18, 2002 | 05:45 AM
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Danw, I don't know, for me, I got a code for O2, reset and got it again in like 50 mi, it was at that point I decided to check the O2s and found that both were bad. I read the Haynes manual on how to check them, they both failed, so I replaced both, reset the ECU and haven't seen a code since.
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