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1997 BMW 540i Repair Question


Topics covered: Sensor, Engine, Check engine light.
Mileage: No information provided.

Asked on November 5, 2010

1997 BMW 540i

Engine Performance problem
1997 BMW 540i V8 Two Wheel Drive Automatic 223000 miles

HI GUYS.
MAYBE YOU COULD HELP ME OUT
MY CHECK ENGINE LIGHT IS ON I'D READ THE CODE ITS SAYS O2 SENSOR HEATER CIRCUIT BANK 1 SENSOR 1
I WENT AHEAD AND REPLACED THE SENSOR RESET THE COMPUTER AND AFTER 4 OR 5 MILES THE LIGHT CAME BACK ON I CHECKED THE CODE AND ITS THE SAME ONE


THANKS GUYS
Avatar Asked by felomax

Answer

Replied on November 6, 2010

Maybe it isn't the sensor. Maybe its in the wiring.

Tiny Answered by Dr. Hagerty (expert)
9,669 answers provided