Thread: check engine light
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Old Apr 3, 2008 | 06:55 AM
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Display_Name
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From: Central CT
Default Re: check engine light
I found this lookup for the listed code. It seems that the CSO is a reference to the Cylinder Shutoff Valve, which is activated to help save fuel "in certain cruise modes."

CODE: P20A2 = An inlet valve of a cylinder is not operated although the CSO is switched off
Source for Code Look up LINK
It would seem, if your sensor is correct, that one of your intake valves is not functioning correctly despite the fact that the computer has not told the CSO to disable that valve.

Here's explanation of the CSO from SnapON's diagnostic manual.
 
Last edited by Display_Name; Apr 3, 2008 at 06:59 AM.
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