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P0143 Diagnostic Trouble Code Discussion for April 2010

Heated Oxygen Sensor (Bank 1 Sensor 3) Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0143
Help Request Posted
1997 Chevrolet Express 1500 4.3L No Start, Hesitation, MIL Lamp on VIN: 1GCFG15W5V
P0143: Heated Oxygen Sensor (Bank 1 Sensor 3) Circuit Low Voltage. It also had a code p0420 cat eff. It had this pile of codes in it so i cleared and po340 keeps returning i think i should get that problem first.Owner said doesn't start sometime.I put a new delphi pump in at his request back in January.of course it has starte...
April 22, 2010