P2430 code meaning
AIR System Air Flow/Pressure Sensor Circuit (Bank 1)
Powertrain system Generic code P24xx codes Check engine light
What P2430 means
On engines with an electric secondary air (AIR) pump, a pressure sensor in the duct between pump and shut-off valve tells the engine computer whether air is really moving to bank 1. P2430 is the basic signal fault of that sensor. GM applies it in a special way: on the 2005–2006 3.8L V6 and the 2006 Corvette and CTS-V V8s it stands for a reading that stays frozen while the pump is commanded on (average error below 0.5 and variance below 1.0 for more than 5 s, once per trip, Type B with MIL after two trips); the 2018 tables keep this logic. Low and high voltage have their own codes, P2432 and P2433; P2435 is the bank 2 twin. The car drives normally, but the secondary air check cannot finish.
P2430 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P2430
- Check engine lamp after two cold starts
- Secondary air readiness not set, emissions test refused
- No noticeable change in driving behaviour
Common causes of P2430
- Most likelyPressure sensor no longer reacts, signal frozen at one value
- PossibleSensor port or duct blocked by water, ice or debris from the pump
- PossibleCorroded connector or damaged harness at the sensor
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Air system flow sensor b1Sai wiring
What each part of P2430 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 30 | The exact fault in that area. |
What to do next
- Note P2430 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2430
What does P2430 mean?
P2430 means "AIR System Air Flow/Pressure Sensor Circuit (Bank 1)". On engines with an electric secondary air (AIR) pump, a pressure sensor in the duct between pump and shut-off valve tells the engine computer whether air is really moving to bank 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2430?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2430 fail an emissions test?
Yes, it can. P2430 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2430 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2430 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.