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Oil sensor switch code p0521

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  #1  
Old 04-27-2019, 05:55 PM
Bro eric70's Avatar
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Join Date: Apr 2019
Posts: 1
Default Oil sensor switch code p0521
I have 07 Monte CarloSS 5.3 AFM engine. I replaced the oil sensor switch and filter under it ,but the check engine light is still coming back on with the same code.Oil change was done as well 5w30 Castrol standard oil . Please help.
 
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  #2  
Old 05-02-2019, 06:15 PM
Join Date: Dec 2014
Posts: 13
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I think when I did mine, I disconnected the battery for 5 minutes
 
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  #3  
Old 06-10-2019, 06:04 AM
Join Date: May 2015
Location: Akron Ohio
Posts: 39
Default Same here.
Code came back after scan tool reset. I'm thinking ground wires.
 
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