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International Automotive Technicians Network
Re: 02's,st,lt all stay at 0
Posted to Technical Discussion Forum on 10/10/2011

My next step would have been to try to figure out why it was staying in open loop. Some PCM's will go to open loop if the fuel trims get maxed out and the PCM doesn't get the feedback it should be getting from the O2 sensors.

When fuel trims can't be used, a... Login to read more.