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P2A00 Diagnostic Trouble Code Discussion for August 2008

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Range / Performance

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Trouble Ticket Help Requests for DTC P2A00
Help Request Posted
2005 Honda Civic EX 1.7L Excessive Emissions, MIL Lamp on VIN: 1HGEM22985
P2A00: Air Fuel Sensor (Bank 1 Sensor 1) Range/Performance. ... /sen. 1/. Open circuit on 3-4 wire. Replaced w/ denso unit. Now have P1172(P2A00). Check voltage at 3-4 of harness, 9.5v. Check 3 to gnd. = 12 v. Check 4 to gnd. & have 2.5 volts. Checked and cleans gnd. that I could find.
August 28, 2008