What it means
The control module detects an electrical fault in the secondary air injection system air-flow or pressure sensor circuit on Bank 1.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The secondary air injection (SAI) system pumps air into the exhaust, usually during cold starts, to help reduce emissions. The control module monitors the bank 1 SAI air-flow or pressure sensor circuit and sets P2430 when it detects an electrical fault in that circuit.
Common causes
Most likely first.
- Faulty air-flow or pressure sensor
- Open or shorted sensor wiring
- Loose or corroded connector
Symptoms
- Check-engine light on
- Rough cold start
- Reduced power or increased emissions
How to diagnose it
- Record freeze-frame data and scan live SAI sensor readings and pump commands to establish when the bank 1 circuit fault occurs.
- With the engine off, inspect the bank 1 SAI sensor connector and nearby harness for loose plugs, corrosion, moisture, chafing, or pin damage.
- Check the sensor circuit's power, ground, and signal wiring for opens or shorts using the vehicle wiring diagram.
- Measure the sensor output and circuit continuity against the manufacturer's specification while the SAI pump is commanded, if the scan tool supports that test.
- If wiring and connections pass, test the bank 1 air-flow or pressure sensor and replace it only if its output is out of specification.
Common fixes
- Reconnect and secure a loose bank 1 SAI sensor connector.
- Clean or repair corroded connector terminals and restore any damaged wiring.
- Repair an open or short in the bank 1 sensor circuit.
- Replace the bank 1 SAI air-flow or pressure sensor if it fails testing.
Can I keep driving?
A short trip is generally possible if the engine runs normally, but avoid ignoring the warning because cold-start emissions may rise and the engine may run roughly. Seek prompt diagnosis if power drops or the fault affects drivability.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.