The secondary air injection (SAI) system delivers fresh air to the catalytic converter or exhaust manifold in order to oxidize unburnt fuel before it leaves the exhaust system. This system uses an SAI pump to pull fresh air into the exhaust port through connected hoses. Some SAI systems use a flow or pressure sensor to monitor system performance. If the powertrain control module (PCM) detects an out-of-range signal from the sensor, the vehicle’s computer will set a P2430 code.
Diagnostic trouble code (DTC) P2430 stands for “Secondary Air Injection System Air Flow/Pressure Sensor Circuit Bank 1.” Bank 1 refers to the bank that contains cylinder #1. The location of this cylinder can vary depending on your vehicle.
The SAI system assists the exhaust system in controlling a vehicle’s emissions by cutting down the amount of hydrocarbons in the system during a cold start. The PCM uses the SAI pump to send pressurized air into the catalytic converter or exhaust manifold to reduce harmful emissions coming out of a vehicle’s tailpipe.
Some SAI systems use a flow or pressure sensor to measure system performance. A P2430 code can be set if the powertrain control module (PCM) detects an out-of-range signal from the sensor. The problems associated with this DTC can become severe over time, so it’s important to address this code as soon as possible.
Note: The definition of code P2430 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
Make sure to consult your vehicle’s repair manual before attempting to diagnose a DTC P2430. Some diagnostic steps can vary depending on your vehicle’s make and model.
However, if you don’t have any auto repair skills and knowledge, we recommend taking your vehicle to an auto repair shop. Professional mechanics can save you from costly mistakes.
There’s no magic bullet solution for troubleshooting a P2430 code. What might work to address a P2430 code for a Pontiac Grand Prix might not work for a Chevy Silverado. Make sure to review your vehicle’s repair manual to figure out the right fix. Fortunately, you won’t have a hard time finding OBD-II resources online. We recommend looking for Chilton repair manuals as well as subscribing to ALLDATA’s single-vehicle subscription service to get detailed information on your vehicle.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.