cost to change O2 sensors - Page 2 - Toyota RAV4 Forums
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#11 (permalink) Old 11-20-2012, 03:36 PM
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Question

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Originally Posted by studiculous View Post
If the front sensor is bad, it shuts off VSC and 4WD.
Ok, but where in the OP's info is this stated as the reason for replacing the sensors, maybe this is not the issue. No codes, no symptoms.
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#12 (permalink) Old 11-20-2012, 05:40 PM
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my VSC and 4WD are shut off when the CEL comes on



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If the front sensor is bad, it shuts off VSC and 4WD.
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#13 (permalink) Old 11-20-2012, 05:45 PM
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when car sits for a couple of days in humid weather, CEL, VSC and 4WD comes on. error code indicates bad ECM but that is misleading as the exact code has been debugged by someone's experiences on the internet as a bad O2 sensor, error goes away after one day. problem does not occur often which makes me confident the ECM should not be replaced for over $1000.

also symptoms are extremely poor MPG and car has 115K miles with original sensors.




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Ok, but where in the OP's info is this stated as the reason for replacing the sensors, maybe this is not the issue. No codes, no symptoms.
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#14 (permalink) Old 11-20-2012, 06:26 PM
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Don't rely on a diagnosis with a single incident with the MIL light. If the light emits and a test of the OBDII indicates O2 sensor, try a oxygen safe carb cleaner in the throttle body, clean the TB and enough cleaner to smother the O2sensor(s). You just may buy some time and distance. But if your MPG is suffering you may have to bite the bullet. Getting at least 100,000 miles on a O2 sensor is good life, heated or not.
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#15 (permalink) Old 11-20-2012, 08:29 PM
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I just don't want to overpay for replacing the sensors that's all. I want to get informed about what a realistic cost to do the job is so I don't get taken advantage of.


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Don't rely on a diagnosis with a single incident with the MIL light. If the light emits and a test of the OBDII indicates O2 sensor, try a oxygen safe carb cleaner in the throttle body, clean the TB and enough cleaner to smother the O2sensor(s). You just may buy some time and distance. But if your MPG is suffering you may have to bite the bullet. Getting at least 100,000 miles on a O2 sensor is good life, heated or not.
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#16 (permalink) Old 11-20-2012, 08:42 PM
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Pcm has at least a 7/70 warranty or 8/80 in some states, that said, it would be very unusual for that to fail.
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