P0437

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2017-10-10

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Description:

• The fault code P0437 indicates that there is an issue with catalyst temperature sensor bank 2

Possible Symptoms:

• Illuminated check engine light

• Failed emissions testing

Possible Causes:

• Faulty catalyst temperature sensor or the associated circuit

• Oxygen sensor malfunction

Related Parts:

• Catalyst Temperature Sensor: A catalyst is a chemical substance that takes the exhaust gas stream from the engine and converts toxic gases and pollutants to less harmful pollutants. The function of the catalyst temperature sensor is to warn the car computer if temperature of the catalyst goes above the safe limit. Problems lead to harmful emissions out of limit

Possible Solutions:

• Replace the faulty catalyst temperature sensor

• Replace the faulty catalytic converter (if necessary)

• Check and replace any malfunctioning oxygen sensors

• Repair any exhaust leaks

• Replace the engine control module (ECM) if necessary