Secondary air injection system malfunction in engine control module (ECM) is called P0410 code. What cause P0410 code or secondary air injection system malfunction? A possible reason of secondary air injection system malfunction is low airflow into the exhaust, as a result of blockage into the air injection system air intake. If the oxygen sensors respond slow to increased oxygen in the exhaust, then this may also result to secondary air injection malfunction. A partly clogged catalyst can also lead to secondary air injection malfunction due to increasing back pressure present in the exhaust. The same is true with the air injection pump relaying contacts not making any contact.
What are the symptoms of secondary air injection malfunction? The signs include illuminated Check Engine Light (code is set to ECM memory and freeze frame), noisy air injection system pump (bad bearings), and the engine may run too rich (due to excessive oxygen pumped into the exhaust). 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 most common mistakes when diagnosing secondary air injection malfunction or P0410 code? The common mistakes of diagnosing secondary air injection malfunction or P0410 code 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 air pump replacement. If there is secondary air injection malfunction or P0410 code, your vehicle may fail the emission testing. Same is true with a check engine light that is on. In order to fix a secondary air injection malfunction or P0410 code, there should be the replacement of air injection pump and power relay, sluggish oxygen sensors, and clogged air injection intake filter.
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