2007 H3 Engine Code P2431

[ChadB]

Hey Guys,

When I start the old '07 H3 I get engine code P2431 which says "Secondary Air Injection System Pressure Sensor Performance." Apparently this reduces the hydrocarbon emissions during cold starts?? Really other than the light coming on and I turning it off with the code reader every time the vehicle doesn't drive or run any different at all, a few weeks ago it breezed through an Ontario emission test.

Do you think it's worth looking into or not a big deal?

Thanks

Chad

 

[powerlifter]

Getting the same message on my 2007 h3. It's a fault in the secondary air injection system. It should not affect normal driving, as it's purpose is to inject air to the exhaust system to speed cat heating. Only supposed to function for about 15 seconds on startup. Could be the air pump, pump relay, or the check valve, which includes the pressure sensor. The air pumps have a tendancy to fill with water from condensation, and fail. Personally, im suspecting the pressure sensor in the check valve. Currently working on it....

 

[Airborne]

I had that issue a while back. I thought it may be the pump but it turned out it was the hose from the pump to the valve that sits right above the manifold. Even with the heat shield there it gets really hot and compromised the hose. I replaced the hose and no more code. If you don't care about the code then you can leave it, it's not hurting anything.


so right after I posted I realized it was a super old post... I hope the op got it sorted out last year :/