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International Automotive Technicians Network
Re: 1997 E350 P1151 code and o2 sensor
Posted to Technical Discussion Forum on 5/16/2003

P1131/51's are pretty common and are usually due to a defective HO2S. In my experience with 1131's, the HO2S will switch fine in the stall then fail at freeway speeds. I've seen this numerous times.

If the customer leaves the defective HO2S in long enough (l... Login to read more.

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