i was planning on going through the exhaust system any way. i can hear a leak.

ok so 90 seconds for a cycle then? i meant generally more than just an O2 sensor scenario.

so you telling me to refer back to the link for the manual CO 94? is there more tests to follow for troubleshooting? and ya, thinking injectors too

 

so another update. my neighbor drove the rv lately and ran over some railroad tracks. the light went off. so either the injector cleaner is cleaning injectors or there is a loose connection somewhere. thanks again guys