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P1271 Diagnostic Trouble Code Discussion for April 2013

Air Fuel Sensor (Bank 1 Sensor 1) Circuit No Activity

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Trouble Ticket Help Requests for DTC P1271
Help Request Posted
2000 Ford Excursion XLT 7.3L MIL Lamp on VIN: 1FMSU41F7Y
P1271: Cylinder 1 - High To Low Side Open Detected. ... shop. They had repaired the transmission and on their test drive, it began to run poorly after a few miles and started stalling. They replaced the UVC harness on the right side with a dorman unit but still wouldnt run right. It came to us on the hook with...
April 04, 2013