Just went Stage 2, trouble codes on reflash, please help

pharmer81 · 01-01-2013, 12:26 PM

I just installed a Cobb DP and AEM CAI to complement my Magnaflow catback. I reflashed to stage 2 with the appropriate AP tune for Stage 2, 91 octane, with AEM CAI. Immediately upon startup, it threw the following codes:
P2008
P2012
P2021
P2016

Can somebody give me some insight as to what is wrong. It wasn't like they threw it after it was running. It was immediate. I tried a reflash to the LWG map just in case the map was corrupted, and nothing. The car starts and runs, but the check engine light is on, and the Si Drive light and cruise control lights are flashing.

HeroCrank · 01-01-2013, 12:30 PM

Use your AP as a code reader, or search the codes here and report back.

pharmer81 · 01-01-2013, 12:45 PM

Ok. I found a connector that I must have bumped off. Plugged that in, now I'm still left with code P2021.

pharmer81 · 01-01-2013, 12:51 PM

P2021 is intake manifold runner position sensor bank 2

pharmer81 · 01-01-2013, 01:20 PM

I found the sensor on the driver's side of the intake unplugged, so I plugged it in. Now I get P2005 and P2012 before I even start the car, and I get P2006 after I start the car. The interesting thing is there is no way I "accidentally" unplugged this sensor. The previous owner had the Cobb Stage 1 V3.01 93 octane LWG tune loaded, and I never noticed any problems. Would there be any reason he would have had these sensors unplugged? I'm really confused right now. I'm hoping I have a simple problem, but I'm past my depth of knowledge. I though I was just going to be bolting on parts and flashing a tune.

coalslaw · 01-01-2013, 07:15 PM

um could you try putting it back to stock airbox and see if that will change the results?

cmiovino · 01-01-2013, 07:17 PM

The Cobb OTS MAP does not support the AEM CAI. You either need a stock airbox or Cobb SF intake.

pharmer81 · 01-01-2013, 07:37 PM

Actually, I have the specific map for the AEM. I figured out the problem though. After doing some research as to why the TGV connectors would be disconnected from the intake manifold, it would appear the previous owner did a TGV delete. The stage 1 tune he was running apparently had the trouble codes deleted through Accesstuner Race. Since I have a Mac and cannot run ATR, I reflashed his Stage 1 map, and then flashed my correct Stage 2 map as a realtime flash over the top of the stage 1 map (from my research, this does not affect the trouble code omissions). After doing this, all is well. The car runs great, sounds great, and no codes. Now I'll have to do some data logging and get everything dialed in. Hopefully this topic will be of help in the future to someone in a similar predicament.

bacalhau16 · 01-02-2013, 05:46 PM

Just so you know, there is an accessport subforum here. You wouldve found better information there.
Technical->Engine management->Accessport

blue sedan · 01-02-2013, 06:00 PM

Cobb has great customer support!If your in doubt call them, they will help you step by step.Good Luck!

01-01-2013, 12:26 PM	#1
pharmer81 Scooby Newbie Member#: 341981 Join Date: Dec 2012 Location: Lincoln, NE Vehicle: 2008 STI Charcoal	Just went Stage 2, trouble codes on reflash, please help I just installed a Cobb DP and AEM CAI to complement my Magnaflow catback. I reflashed to stage 2 with the appropriate AP tune for Stage 2, 91 octane, with AEM CAI. Immediately upon startup, it threw the following codes: P2008 P2012 P2021 P2016 Can somebody give me some insight as to what is wrong. It wasn't like they threw it after it was running. It was immediate. I tried a reflash to the LWG map just in case the map was corrupted, and nothing. The car starts and runs, but the check engine light is on, and the Si Drive light and cruise control lights are flashing.

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01-01-2013, 12:30 PM	#2
HeroCrank NASIOC Supporter Member#: 301089 Join Date: Nov 2011 Chapter/Region: NESIC Location: MAINE Vehicle: 2011 WRX 5 door TP stage 2	Use your AP as a code reader, or search the codes here and report back.

01-01-2013, 12:45 PM	#3
pharmer81 Scooby Newbie Member#: 341981 Join Date: Dec 2012 Location: Lincoln, NE Vehicle: 2008 STI Charcoal	Ok. I found a connector that I must have bumped off. Plugged that in, now I'm still left with code P2021.

01-01-2013, 12:51 PM	#4
pharmer81 Scooby Newbie Member#: 341981 Join Date: Dec 2012 Location: Lincoln, NE Vehicle: 2008 STI Charcoal	P2021 is intake manifold runner position sensor bank 2

01-01-2013, 01:20 PM	#5
pharmer81 Scooby Newbie Member#: 341981 Join Date: Dec 2012 Location: Lincoln, NE Vehicle: 2008 STI Charcoal	I found the sensor on the driver's side of the intake unplugged, so I plugged it in. Now I get P2005 and P2012 before I even start the car, and I get P2006 after I start the car. The interesting thing is there is no way I "accidentally" unplugged this sensor. The previous owner had the Cobb Stage 1 V3.01 93 octane LWG tune loaded, and I never noticed any problems. Would there be any reason he would have had these sensors unplugged? I'm really confused right now. I'm hoping I have a simple problem, but I'm past my depth of knowledge. I though I was just going to be bolting on parts and flashing a tune.

01-01-2013, 07:15 PM	#6
coalslaw Scooby Newbie Member#: 324808 Join Date: Jul 2012 Chapter/Region: E. Canada Location: Toronto, canada Vehicle: 2006 IWL Stg2 OBP	um could you try putting it back to stock airbox and see if that will change the results?

01-01-2013, 07:17 PM	#7
cmiovino Scooby Specialist Member#: 134005 Join Date: Dec 2006 Chapter/Region: MAIC Location: Pittsburgh, PA Vehicle: 2004 WRX Premium PSM	The Cobb OTS MAP does not support the AEM CAI. You either need a stock airbox or Cobb SF intake.

01-01-2013, 07:37 PM	#8
pharmer81 Scooby Newbie Member#: 341981 Join Date: Dec 2012 Location: Lincoln, NE Vehicle: 2008 STI Charcoal	Actually, I have the specific map for the AEM. I figured out the problem though. After doing some research as to why the TGV connectors would be disconnected from the intake manifold, it would appear the previous owner did a TGV delete. The stage 1 tune he was running apparently had the trouble codes deleted through Accesstuner Race. Since I have a Mac and cannot run ATR, I reflashed his Stage 1 map, and then flashed my correct Stage 2 map as a realtime flash over the top of the stage 1 map (from my research, this does not affect the trouble code omissions). After doing this, all is well. The car runs great, sounds great, and no codes. Now I'll have to do some data logging and get everything dialed in. Hopefully this topic will be of help in the future to someone in a similar predicament.

01-02-2013, 05:46 PM	#9
bacalhau16 Scooby Newbie Member#: 297565 Join Date: Oct 2011 Location: Dartmouth, MA Vehicle: 2011 WRX hatch Silver	Just so you know, there is an accessport subforum here. You wouldve found better information there. Technical->Engine management->Accessport

01-02-2013, 06:00 PM	#10
blue sedan Scooby Specialist Member#: 311622 Join Date: Feb 2012 Chapter/Region: Tri-State Location: Pa. Vehicle: 2010 WRX STG 2 WRB	Cobb has great customer support!If your in doubt call them, they will help you step by step.Good Luck!