2011 Subaru STI jumping codes between P2442 and P2443

Panza · 04-14-2022, 12:58 PM

Howdy friends,

So I've been chasing an engine code that seems to jump and I need a bit of support so I don't spend more money than I have to as these small fixes tend to add up.

Recently I've had issues with a jumping P2442 and a P2443 code. They both seem to be related to the Secondary Air Injection system valves. I've removed the intercooler and sprayed the air injection system with WD-40 and PBB which clears the codes temporarily but it always seems to return back to one of these two codes.

P2442 - Secondary Air Injection System Switching Valve Stock Open (bank 2)
P2443 - Secondary Air Injection System Switching Valve Stock Closed (bank 2)

Is there an alternative fix to this, or am I left replacing a nearly $400 part?
Thanks guys

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Panza · 04-15-2022, 12:55 PM

RockAuto solves the day.

timpala11 · 04-15-2022, 01:48 PM

From everything I read you would have to replace it or remove the system and have the CELs tuned out. I don't have a problem with mine for now but I will be removing it when I have the chance.

Panza · 04-15-2022, 04:20 PM

Quote:

Originally Posted by timpala11

From everything I read you would have to replace it or remove the system and have the CELs tuned out. I don't have a problem with mine for now but I will be removing it when I have the chance.

Yeah... I know that many people remove the system. I'm in a fairly strict state (Massachusetts) which insists it should stay in the vehicle. Also, removing the system would require a tune for the car.

After replacing the system, I'm considering if there's a lubrication or maintenance schedule that should go into the valve to prevent it from seizing again before natural condensation makes it rust out again. 11 years isn't a bad run though.

Panza · 04-19-2022, 05:41 PM

Thought replacing the valve would be the solution but the P2443 code still persists. I inspected the internals of my secondary air valve and the condition was fair and there were no visual traces of rust that I could see.

I've reset the battery since replacing the valve and it seems to only trigger upon starts in the first/morning start up. Driving the car while it's warm does not trigger the P2443 code.

I wonder what else could be causing this issue.

Kaleb2011STI · 11-02-2022, 06:51 PM

Quote:

Originally Posted by Panza

Thought replacing the valve would be the solution but the P2443 code still persists. I inspected the internals of my secondary air valve and the condition was fair and there were no visual traces of rust that I could see.

I've reset the battery since replacing the valve and it seems to only trigger upon starts in the first/morning start up. Driving the car while it's warm does not trigger the P2443 code.

I wonder what else could be causing this issue.

Did you ever figure it out? I’m having the same issue. Even after replacing the valve I still get a P2443 code

04-14-2022, 12:58 PM	#1
Panza Scooby Newbie Member#: 269042 Join Date: Jan 2011 Chapter/Region: NESIC Location: MA Vehicle: 2011 DGM STI Sedan	2011 Subaru STI jumping codes between P2442 and P2443 Howdy friends, So I've been chasing an engine code that seems to jump and I need a bit of support so I don't spend more money than I have to as these small fixes tend to add up. Recently I've had issues with a jumping P2442 and a P2443 code. They both seem to be related to the Secondary Air Injection system valves. I've removed the intercooler and sprayed the air injection system with WD-40 and PBB which clears the codes temporarily but it always seems to return back to one of these two codes. P2442 - Secondary Air Injection System Switching Valve Stock Open (bank 2) P2443 - Secondary Air Injection System Switching Valve Stock Closed (bank 2) Is there an alternative fix to this, or am I left replacing a nearly $400 part? Thanks guys * Registered users of the site do not see these ads.

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04-15-2022, 12:55 PM	#2
Panza Scooby Newbie Member#: 269042 Join Date: Jan 2011 Chapter/Region: NESIC Location: MA Vehicle: 2011 DGM STI Sedan	RockAuto solves the day.

04-15-2022, 01:48 PM	#3
timpala11 Scooby Newbie Member#: 512891 Join Date: Mar 2020 Chapter/Region: Tri-State Location: Philly Vehicle: 2010 STi/21 Passport RIP 19 WRX & 16 FXT	From everything I read you would have to replace it or remove the system and have the CELs tuned out. I don't have a problem with mine for now but I will be removing it when I have the chance.

04-19-2022, 05:41 PM	#5
Panza Scooby Newbie Member#: 269042 Join Date: Jan 2011 Chapter/Region: NESIC Location: MA Vehicle: 2011 DGM STI Sedan	Thought replacing the valve would be the solution but the P2443 code still persists. I inspected the internals of my secondary air valve and the condition was fair and there were no visual traces of rust that I could see. I've reset the battery since replacing the valve and it seems to only trigger upon starts in the first/morning start up. Driving the car while it's warm does not trigger the P2443 code. I wonder what else could be causing this issue.