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Reviving this thread to say that I ordered the whole hose+sensor, getting same code, 27e4. I can't go past 4500 RPM otherwise Limp mode. SES comes on and off randomly.
Will fix sensor, check fuses and report back, this thread helped me out a lot so just in case someone else stumbles upon this, it'll help them too.
Edit: if anyone is having the same issue, the sensor fixed it. My old sensor's gasket was pretty bad, which I assumed was the culprit. Amazing how a tiny gasket can completely cripple my entire engine.
Wish anyone luck who might stumble upon this amazing thread like I did. Removing the sensor was about as hard as putting it on. Two people makes it so much easier. My dad helped me and man I think he had fun lol.
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