DTC code P2433, secondary air injection system?

DONNALEE

MEMBER
2006 PONTIAC GRAND PRIX
3.8L
V6
2WD
AUTOMATIC
200,070 MILES

I have the car listed above base model and it's coming up with the DTC code of P2433 and I would like to know what part or sensor to change to resolve the problem.

Monday, November 27th, 2023 AT 2:50 AM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,640 POSTS

Here's what this code typically indicates:

P2433 - Secondary Air Injection System Air Flow/Pressure Sensor Circuit Bank 1 Sensor 1

9 times out of 10 the problem will be the air injection control valve if the fuse and relay are okay, also, you should inspect the system to make sure there are no hoses or tubes that have holes in them or are not connected. Also make sure the Air pump relay is working as well.

Left front of the engine compartment near the air cleaner duct.

The pressure sensor is inside the control valve, FYI. Check out the images (below). Please let us know what happens.

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Monday, November 27th, 2023 AT 2:39 PM

DONNALEE

MEMBER
2 POSTS

So, I should replace the fuse not the pump itself.

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Thursday, November 30th, 2023 AT 8:52 PM

KEN L

MASTER CERTIFIED MECHANIC
47,640 POSTS

Is the fuse blown? If so yes replace the fuse if it blows again then replace the air pump, here is the location and instructions on how to do so. Check out the images (below). Let us know how it goes.

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