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EVAP Monitor and Fuel Level

 
Old Apr 27, 2019, 10:02 AM
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EVAP Monitor and Fuel Level

So I have a 2002 ES. The car is throwing the P0456 code. I understand the EVAP monitor runs the test only when the fuel level is between certain limits. Another problem I have is the fuel guage is erratic which is a problem with the sending unit. For example, the guage will read 3/4 full when it is actually almost empty. So if the EVAP monitor runs the test during this condition I understand the results may be inaccurate and could this be the cause of the P0456 code? So, to test the system I am going to attempt to keep the fuel in the tank at the levels required when the test is performed. I can monitor the fuel tank level by the odometer. So if all this seems like a reasonable test to you guys, my question is between what tank level percentages does the EVAP monitor perform the test.
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