oxygen sensors open loop
10-23-2008, 08:48 PM
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oxygen sensors open loop I have an 04 ZO6 and I am getting DTC's P034 and P054 which are inactity on primary oxygen sensors. The Tech2 scan tool shows a steady 435mV on all four sensors. The sensors and connections are good. I know engine temp is one parameter for the sensors to go into closed loop. This is OK at 188F. Is there any other parameter that can affect all four sensors?
