When it comes to the generic code of engine control module (ECM), P0410 code refers to secondary air injection system malfunction. What causes the secondary air injection to malfunction or fail? It occurs when the air injection system intake is clogged or blocked, so the airflow decreases into the exhaust. If the oxygen sensors respond slow to increased oxygen in the exhaust, then this may also result to secondary air injection malfunction. Secondary air injection malfunction is also a result of partly clogged catalyst, increasing the exhaust back pressure. This is also the same with relaying contacts of air injection pump not making any contact.
How do you know that your vehicle is suffering from secondary air injection malfunction? The Check Engine Light is illuminated and the code is set to ECM memory and freeze frame. How does a mechanic diagnose secondary air injection malfunction? The auto mechanic scans codes and documents the freeze frame data (to identify the problem), clears the engine codes and retest the secondary air injection system (detect proper functioning), repairs any oxygen sensor or other codes (prior to P0410 diagnosis), monitors the oxygen sensor pid using a scanner (observe sensor reaction when the air injection pump is activated), and replaces a slow oxygen sensor and retesting the entire system.
What are the usual mistakes in the diagnosis of secondary air injection malfunction? The most common mistakes of when it comes to secondary air injection malfunction or P0410 code diagnosis include not checking the air injection pump relay for burnt wire connections prior to replacement of an air injection pump, and not checking for proper intake air flow into the air injection pump prior to replacement. If there is secondary air injection malfunction or P0410 code, your vehicle may fail the emission testing. Your vehicle will also fail the emission test if the check engine light that is on. The repair of secondary air injection malfunction or P0410 code include sluggish oxygen sensors, replacement of air injection pump and power relay, and clogged air injection intake filter.
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