What is your question?
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What is your question?
Fix o2 senson codes. Ow cant get all systems ready for emmison testing. All except evap and cat ready..... Have done drive cycle. Have put al.ost 300 miles since reset. Anything else i need to check? Fuse?
What makes this problem better or worse?
We changed o2 sensors 2 on both banks.
How long has your 2004 Chevrolet Silverado 1500 had this problem?
Been trying to get emmisions for 6 weeks
1 Reply
Hello, So, the engine control module (ECM) wants to pass the readiness tests (self-testing) so it can set your monitors to ready and begin monitoring the emissions systems on your truck. In most cases where the readiness test fails during the drive cycle it can restart the test. At a certain degree of failed attempts, you get an incomplete fail. That's probably where you are now. Have it diagnosed. You will likely not have a check engine light or trouble codes registered for those issues because the system is not ready to monitor. Diagnosis is going to require a professional diagnostic scan tool and some hands on testing of the EVAP system.