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P0178 Diagnostic Trouble Code Discussion for January 2012

Fuel Composition Sensor Low Frequency

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Trouble Ticket Help Requests for DTC P0178
Help Request Posted
2004 Chevrolet Tahoe LS 5.3L No Start VIN: 1GNEC13ZX4
P0178: Fuel Composition Sensor Low Frequency. The FCP measures alcohol content is 38% and the scanned value is 43. Spec is 45 to 145 for content. Fuel trim observed cold and during warm up is -17 on LT and -1 to -3 on ST. No start occurs only below 50 degrees, when warmer after over night sit will start, ...
January 26, 2012