P0424 Code - Heated Catalyst Temperature Below Threshold Bank 1

What Does P0424 Mean?

The P0424 code warns that the catalytic converter is not functioning to its normal capacity. This can cause a number of problems for the vehicle, but most notably it could mean that the vehicle’s emissions will increase and the vehicle will not be able to pass an OBD-II emissions test required for registration in most states.

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What are the common causes of P0424 ?

DTC P0424 may have number of causes. Here are the most common.

• Lack of Maintenance – It does one good to note that the catalytic converter is not a wear item, and should last the life of the vehicle. Unrectified engine problems, such as faulty oxygen sensors or cylinder misfires, for example, can lead to catalyst overheating, over 1,800 °F to 2,500 °F, possible meltdown, and failure. Always maintain your vehicle, use the recommended fluids and parts, and make repairs promptly. Failure to do so can easily lead to catalytic converter damage.
• Lazy Oxygen Sensor – It is possible that, even if an AFR sensor passes the ECM monitor, it may be “lazy,” or reacting slowly. The result is a wider swing of rich and lean, constantly overheating and underheating the catalytic converter, eventually leading to damage. The factory repair manual, or equivalent, should give some kind of specification regarding expected switching times.

How do you troubleshoot P0424 ?

Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. P0424 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid.

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