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P0178 Diagnostic Trouble Code Discussion for September 2007

Fuel Composition Sensor Low Frequency

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Trouble Ticket Help Requests for DTC P0178
Help Request Posted
2003 Chevrolet S10 2.2L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1GCCS14H43
P0178: Fuel Composition Sensor Circuit Low Voltage. I have tried to find info about this sensor in Alldata and Mitchell. I can not find any info on it. When I look at scan data, I see upstream O2 at 0 mv, short term srat at 45%, long term at 0 % and running so rich that it leaves a black spot on concrete. New P...
September 30, 2007