92 VX O2 sensor heater, code 48 - Fuelly Forums

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Old 05-01-2009, 10:15 AM   #1
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92 VX O2 sensor heater, code 48

Hello,

New VX owner here. '92, fed, 211k. Bought it with the CEL on. Came up with code 48. My Hanes manual said to check the voltage to the O2 sensor heater. If I understood correctly, I was supposed to get "battery voltage" for pins A and C on the engine side of the O2 sensor harness. I got 6ish volts... The manual does not say what to do if improper voltage is present. Any ideas?

Before running the codes, my gut instinct was to just replace the O2 sensor... now I think I will wait and see if there isn't another problem present. The car is getting 35ish MPG, idle at 1kish, and the shift light is inoperable, if that helps the diagnosis.

Your help is much appreciated.
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Old 05-01-2009, 10:33 AM   #2
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yep my did the same thing, be sure you get the right O2 sensor, there about 350$ at an auot parts store
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Old 05-01-2009, 11:08 AM   #3
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yep my did the same thing, be sure you get the right O2 sensor, there about 350$ at an auot parts store

Are you saying that it is likely just the O2 sensor?

I have searched on here and am leaning toward the $100 version, if the O2 sensor is the issue.


http://stores.channeladvisor.com/Aut...xygen%20Sensor
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Old 05-01-2009, 11:29 AM   #4
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Most Likely it is the O2 sensor, great deal on the O2, i would verify the part number with honda
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Old 05-01-2009, 11:36 AM   #5
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I think some other users have bought from that place. Is it the same one as in my sig?

Edit: Yes, it is.
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Old 05-01-2009, 05:17 PM   #6
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I think some other users have bought from that place. Is it the same one as in my sig?

Edit: Yes, it is.
So anyone know how I can further diagnose the O2 sensor heater?
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Old 05-01-2009, 08:22 PM   #7
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If you have a check engine light with a code of 48 and your shift light doesnt work and your getting only 35mpg, I put my money on the O2 sensor. Go ahead and unplug the sensor and see if there are any changes, if there isnt then its 100% the sensor.
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Old 05-02-2009, 09:46 PM   #8
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Is that $99 oxygen sensor a 'universal' sensor or is it made for a Honda ????
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