PCM takes inputs form Heated Oxygen Sensor to determine oxygen content in the exhaust system. Bank 1, sensor 3 refers to the third sensor back on bank 1. Bank 1 is the side of the engine that contains the #1 cylinder. The Oxygen sensor heater can be controlled in one of two ways depending on the make of the car.
What causes the problem of Heater Circuit Control Low (B1 S3)?
Failed Bank 1 Sensor 3 Short/open wiring problem High resistance and poor electrical connections ECU error
Replace/Repair These Parts to Fix OBD Code P0043
Powertrain Control Module - PCM issues directly affects the engine control and transmission control module. Thus, replace faulty components now. Catalytic Converter - Sometimes catalytic converters can overheat and become faulty. Replace your old catalytic converter now! Diagnostic Tool - Find wide range of diagnostic tools to detect and correct the OBD code error. Exhaust System - Replace damaged exhaust parts immediately as a damaged one hampers the fuel economy and thus the performance.
More Info About OBD Code P0043: https://partsavatar.ca/p0043-obd-ii-trouble-code-ho2s-heater-control-circuit-low-b1s3-solution-pcm-exhaust-system-o2-sensor
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