Test DN: Step 20

20) KOEO Code 34: Check For Code 84  KOEO Code 34 indicates EGR valve and/or EVP is not fully seated in the closed position. EVP voltage signal, in the closed position, is greater than the self-test maximum of 0.67 volt. Because of the preload on the installed EVP sensor it is very difficult to determine if the EGR valve is seated or the EVP sensor is in contact with the EGR valve. Possible causes for this fault are: poor continuity at EVP sensor, non-seated EGR valve, faulty EGR valve or EVP sensor. Turn key off and wait 10 seconds. Check for Code 84 in KOEO Self-Test. If Code 84 is present, go to step 10) in this TEST. If Code 84 is not displayed, go to next step.