P0439

2017-10-10

Description:

  • The fault code P0439 suggests that the Catalyst Heater Control Circuit for Bank 2 Sensor 2 is malfunctioning. This may lead to a poorly functioning catalytic converter, which can cause the engine to run poorly, emit increased emissions and even fail state inspection.

Possible Symptoms:

  • Illuminated Check Engine Light

  • Poor acceleration and performance

  • Reduced fuel economy

  • Failed state inspection

Possible Causes:

  • Failed Catalyst Heater Control Circuit Bank 2 Sensor 2

  • Damaged wiring or connections in the circuit

  • Corroded or loose electrical connections

  • Failed Powertrain Control Module (PCM)

Related Parts:

  • Catalytic Converter: A catalytic converter is a device that converts toxic gases and pollutants to less harmful pollutants. Problems lead to harmful emissions out of limit, rotten egg smell from exhaust & reduced speed

Possible Solutions:

  • Repair or replace the faulty Catalyst Heater Control Circuit Bank 2 Sensor 2

  • Check and repair any damaged wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the Powertrain Control Module (PCM) if necessary

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