P0413 Code - Secondary Air Injection System Switching Valve 'A' Circuit Open

What Does P0413 Mean?

P0413 is an OBD-II generic code for a voltage problem with the air injection system. Most systems send voltage readings to the engine control module and if those readings are out of the manufacturer’s parameters, the system will be deemed defective and a Check Engine Light will be illuminated.

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What are the common causes of P0413 ?

The most common causes of this code being stored occur in cold weather conditions. The secondary air injection pump is protected by using a one way check valve that is integrated into the air inlet hose. The check valve usually goes bad and allows condensation (water) from the exhaust to enter the pump, where it freezes in extremely cold weather. With ice inside of the secondary air injection pump, it binds and either causes catastrophic pump failure or overloads the circuit (usually blowing the fuse). Electrical wiring and connectors are also subject to being burnt by high temperature engine exhaust.

How do you troubleshoot P0413 ?

There are currently two main types of cylinder deactivation used today, depending on the type of engine. P0413 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.



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