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Old 08-26-2005, 02:51 PM   #1
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Default PO332 scanner code???

1999 GMC reg cab 5.3 auto...I have been getting a PO332 knock sensor low input bank two. What does this mean and were do I start looking to fix it. I have hooked up my scanner and erased it twice to make sure it wasn't a false code but it came back . So what do I do now?Any help or advice will be great. Thanks in advance..
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Old 08-26-2005, 06:08 PM   #2
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pull the intake off, check the holes where the knock sensors are to see if they are full of water, clean out holes, clean corrosion off connectors, clean connector on sensor or replace knock sensors, use a sealer on side of rubber caps covering holes to prevent water from getting in
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Old 08-26-2005, 06:24 PM   #3
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Quote:
Originally Posted by mjgjr72
pull the intake off, check the holes where the knock sensors are to see if they are full of water, clean out holes, clean corrosion off connectors, clean connector on sensor or replace knock sensors, use a sealer on side of rubber caps covering holes to prevent water from getting in
I believe that there's a TSB that outlines this exact repair...
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Old 08-27-2005, 12:10 PM   #4
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yep they sure are for all 99-2002 tahoe, silverado ,suburban the back one gets water in it and it shows false knock.
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Old 08-27-2005, 07:21 PM   #5
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I happened the next day after washing the engine down. Will the water that got in there evaporate? and I don't have to go thru removing the intake to check the knock sensors? or should I just replace the knock sensors since my truck has 147,000 miles on it. How can I prevent this from happening again? I've heard the intake doesn't seal well in the front is this true?Thanks in advance..
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Old 08-27-2005, 08:03 PM   #6
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Quote:
Originally Posted by 01wtahoe
I happened the next day after washing the engine down. Will the water that got in there evaporate? and I don't have to go thru removing the intake to check the knock sensors? or should I just replace the knock sensors since my truck has 147,000 miles on it. How can I prevent this from happening again? I've heard the intake doesn't seal well in the front is this true?Thanks in advance..
maybe eventually, the only way to keep from happening again is to pull off the intake and seal the holes the knock sensors mount in, might as well change them while your in there, hell while you have the intake off you can always drop on a radix
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Old 08-27-2005, 08:03 PM
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1999, 2000, 2001, 2003, 53, code, gmc, knock, po332, sensor, sierra, silverado, suburban, tahoe, tsb


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