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Old 04-27-2009, 09:42 AM   #1
Odyknuck
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2006 Impreza
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Default 2000 RS Front O2 sensor heater

Does the 5 wire O2 sensor heater stay on constantly? Or is the Heater pulsed. I just replaced the front O2 on mine and the heater does not warm up. The rear heats up fine.
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Last edited by Odyknuck; 04-27-2009 at 12:31 PM.
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Old 04-27-2009, 09:19 PM   #2
Evil XT
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Originally Posted by Odyknuck View Post
Does the 5 wire O2 sensor heater stay on constantly? Or is the Heater pulsed. I just replaced the front O2 on mine and the heater does not warm up. The rear heats up fine.
WHAT?!
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Old 04-28-2009, 02:09 AM   #3
PA-Outback2000
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is the code text "bank 1 sensor 1-heater circuit malfunction" or something close to that?
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Old 04-28-2009, 12:47 PM   #4
Odyknuck
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is the code text "bank 1 sensor 1-heater circuit malfunction" or something close to that?
I am using an LM-2 reader and there are no codes.
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Old 04-28-2009, 12:49 PM   #5
Odyknuck
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WHAT?!
What are you asking with "WHAT?!"
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Old 05-01-2009, 01:19 AM   #6
Evil XT
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replace the a/f sensor
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Old 05-01-2009, 09:20 AM   #7
yarrgh
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the oxgyen sensor heats itself up during startup to order to get up to monitoring temperature quickly. After the initial heating, my assumption (yes, assumption) is that it will not need to be heated again as the exhaust gases are hot enough.
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Old 06-02-2009, 01:58 PM   #8
Odyknuck
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the oxgyen sensor heats itself up during startup to order to get up to monitoring temperature quickly. After the initial heating, my assumption (yes, assumption) is that it will not need to be heated again as the exhaust gases are hot enough.
Is it possiable that the IAT has to be below a certain temperature before it would do this?
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