O2 Sensor P1139 ?
CEL light came on over the weekend.
Car still running fine.
Code from ECU explorer.
P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem.
Presumably needs replacing but where do I find it and best place to get one form please?

Car still running fine.
Code from ECU explorer.
P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem.
Presumably needs replacing but where do I find it and best place to get one form please?
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