What happens when secondary air pump fails?
A faulty secondary air injection pump will cause problems for the air-to-fuel ratio in your internal combustion engine. If this ratio is too lean (not enough fuel), then your engine will have trouble generating speed whenever you step on the gas pedal.
What does a secondary air pump relay do?
The Secondary AIR System (AIR) helps reduce Hydrocarbon (HC), Carbon Monoxide (CO, and Oxides of Nitrogen (NOx) exhaust emissions. It also helps the warm up of the 3-way Catalytic Converters on engine start-up so conversion of exhaust gases can occur sooner.
How do you know if your secondary air pump is working?
The secondary air pump has to start audibly after a cold start of the engine. Start vehicle engine. If the power supply of the secondary air pump is fine, but the secondary air pump runs with a scraping, whistling or scratching noise or not at all, the secondary air pump is to be replaced.
What does secondary air injection system relay a circuit mean?
Secondary Air Injection System Relay A Circuit Malfunction What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles (Dodge, Ram, Ford, GMC, Chevrolet, VW, Toyota, etc.). Although generic, the specific repair steps may vary depending on make/model.
How to diagnose a p0418 secondary air injection system relay?
In order to accurately diagnose a code P0418, a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable vehicle information source (like All Data DIY) will be required. Inspect system wiring, connectors, and the serpentine belt which drives the pump (if applicable) to begin your diagnosis.
What are the codes for secondary air injection?
Other secondary air injection system trouble codes include P0410, P0411, P0412, P0413, P0414, P0415, P0416, P0417, P0419, P041F, P044F, P0491, and P0492. There is no need to address a stored code P0418 with great urgency. The SAI system is associated only to exhaust emission reduction and is not essential to engine operation.
Why is the DTC p0418 relay’a’circuit not working?
The DTC P0418 is detected the the AIR vacuum control solenoid circuit not operating as desired by the PCM. An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module ( PCM) grounds the Air pump relay control circuit which energizes the Air pump.
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