P2431 VOLKSWAGEN - Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1
- Faulty Secondary Air pressure sensor
- Secondary Air pressure sensor harness is open or shorted
- Secondary Air pressure sensor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P2431 Volkswagen DescriptionTo accelerate the activation of catalyst when warming up the engine, the air injection system pumps the secondary air to the exhaust manifold by pressure. The secondary air is supplied by the air pump and it is pumped to the exhaust manifold through the air switching valve. Open and close movement of the air switching valve is regulated by the Vacuum Switching Valve (VSV).The air pump and the air switching valve are observed by the Engine Control Module (ECM) and are used to detect malfunction in this system. The ECM monitors the secondary air injection system and detects malfunction using a pressure sensor located on the air switching valve.
The ECM observes the pressure in the secondary air passage using the pressure sensor located on the air switching valve in the secondary air injection system. The sensor detects an exhaust pressure in the secondary air passage.
Need more help?Get the P2431 Volkswagen code diagnosed by a professional: Find a repair shop in your area
P2431 VOLKSWAGEN CommentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P2431 Volkswagen code? Have you replaced any parts?
Any information is appreciated. Thanks