Bizarre OCV issues. Help! P2092 and P2088

[korinthia]

The background may or may not be important feel free to skip.

Brackground:I have a 2008 STI, dropped a new block into it 8k miles ago and the thing had a nasty oil leak ever since, and an intermittent gas leak. I had fixed the gas leak in the past by tightening the hose clamps under the manifold. After a while the leak came back and the clamps were still tight, so I said screw it I am tired of screwing with this and pulled the manifold and installed Aeromotive fuel rails, lines, and an Aeromotive A1000-6 FPR, and look around for the source of the oil leak and find nothing. Put the car back together, get a new tune, car runs great. I do some research and see that hairline cracks in the AVCS line are common, so I decide that must be the issue and order the IAG replacement. So three weeks later I pull the manifold again (FML) and I come to find out that like an idiot I had forgotten one crush washer on the AVCS line banjo going into the head right in front of the turbo. I had already bought IAG's AVCS line replacement, so I decided to go ahead and use it instead of just putting in the missing washer, flexible more durable etc. etc.

TL;DR: I pull the intake manifold, install fuel rails, lines, fpr, reassemble car runs great. Pull the manifold again 3 weeks later replace AVCS/turbo feed line, and install 8mm phenolic spacers.

Problems begin: On my way home from installing the AVCS line I get a CEL, p2092 OCV (OCV Solenoid Valve Signal A Circuit Open (Bank 2)). I clear the code and things are fine for a day or so of regular driving and it eventually comes back. I do some research and see that its an electrical issue and poke around my engine bay and find a loose ground. I tighten it and clear the code, and have no problems for a week until last night when as I am coasting to a stop light I get another CEL p2088, same code opposite side (Bank 1). So I pull over and clear the code, pull back onto the road and it throws the code again almost immediately. The car feels rough under 3k RPMs but the A/F ratio remains good.

I find it extremely odd that I would have the same code on both sides, I didnt unplug either of the AVCS solenoids when I removed the IM on either occasions, and I never had any issues before replacing the oil line (and fixing the leak subsequently). I've talked to my tuner and he was as stumped as I am, any help would be appreciated.

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[ModernEtho]

Originally Posted by korinthia

The background may or may not be important feel free to skip.

Brackground:I have a 2008 STI, dropped a new block into it 8k miles ago and the thing had a nasty oil leak ever since, and an intermittent gas leak. I had fixed the gas leak in the past by tightening the hose clamps under the manifold. After a while the leak came back and the clamps were still tight, so I said screw it I am tired of screwing with this and pulled the manifold and installed Aeromotive fuel rails, lines, and an Aeromotive A1000-6 FPR, and look around for the source of the oil leak and find nothing. Put the car back together, get a new tune, car runs great. I do some research and see that hairline cracks in the AVCS line are common, so I decide that must be the issue and order the IAG replacement. So three weeks later I pull the manifold again (FML) and I come to find out that like an idiot I had forgotten one crush washer on the AVCS line banjo going into the head right in front of the turbo. I had already bought IAG's AVCS line replacement, so I decided to go ahead and use it instead of just putting in the missing washer, flexible more durable etc. etc.

TL;DR: I pull the intake manifold, install fuel rails, lines, fpr, reassemble car runs great. Pull the manifold again 3 weeks later replace AVCS/turbo feed line, and install 8mm phenolic spacers.

Problems begin: On my way home from installing the AVCS line I get a CEL, p2092 OCV (OCV Solenoid Valve Signal A Circuit Open (Bank 2)). I clear the code and things are fine for a day or so of regular driving and it eventually comes back. I do some research and see that its an electrical issue and poke around my engine bay and find a loose ground. I tighten it and clear the code, and have no problems for a week until last night when as I am coasting to a stop light I get another CEL p2088, same code opposite side (Bank 1). So I pull over and clear the code, pull back onto the road and it throws the code again almost immediately. The car feels rough under 3k RPMs but the A/F ratio remains good.

I find it extremely odd that I would have the same code on both sides, I didnt unplug either of the AVCS solenoids when I removed the IM on either occasions, and I never had any issues before replacing the oil line (and fixing the leak subsequently). I've talked to my tuner and he was as stumped as I am, any help would be appreciated.

Did you find what caused this? I have the same two codes and can't find anything on having both OCV codes.

[3-MPG]

Curious what the fix was