knock knock whose there? CEL!

cassinelli23 · 02-06-2011, 03:11 PM

ok my sister has 2002 2.5rs with 180k on it. the car had run great all along except a few months back the car over heated... seemed like a random event. last month the car over heated on her again and she parked it because everyone had said it was a head gasket. Until i got to look at the car myself thats what i thought too, that the heads were just expanding when it was driven hard. I dug the car out of the months worth of snow and drove it all day yesterday. The car ran fine except for the following CEL codes. That went away then came back at one point.

P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
P0156 Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2)
P0157 Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0063 HO2S Heater Control Circuit Low (Bank 2 Sensor 3)
P1872 Rear Left ABS Sensor Signal.... im not sure if thats right?

all of these codes seem related to the car knocking but it seems like just replacing the sensor wont be the fix

munkis · 02-06-2011, 04:19 PM

Where did you pull those codes from because the only one that applies to a Subaru is P0328

The rest do not apply there is no bank 2 sensor 2 on an RS, nor bank 2 sensor 3
and there is no 1872 code.

cassinelli23 · 02-06-2011, 04:26 PM

i got the the codes(the numbers) off of my accessport for my wrx. the definitions i pulled from a website because it was easier to copy and paste. the banks arent right and just the definitions are i believe. ill get the real codes up in a bit

munkis · 02-06-2011, 04:39 PM

access port is a terrible code reader.

Those are standard OBDII codes, they just do not apply to a 2002 RS.

P0156
P0157
P0063
P1872

Go get a real code reader or go to an autozone and have them pull the codes.

The only one that applies is P0328 which is for knock sensor circuit issue. Do some searching on here there is plenty of info as it is a common code.

sparkyL · 08-24-2011, 12:22 AM

I just pulled the codes from my 2001 2.5rs with an accessport when the CEL came on. As well as the code that I'm presuming is the one I need to address (P0420 - catalyst), I got the same codes P0156, P0157, P0063 and P1872.

02-06-2011, 03:11 PM	#1
cassinelli23 Scooby Newbie Member#: 198655 Join Date: Dec 2008 Chapter/Region: Tri-State Location: NY Vehicle: 2011 STI White	knock knock whose there? CEL! ok my sister has 2002 2.5rs with 180k on it. the car had run great all along except a few months back the car over heated... seemed like a random event. last month the car over heated on her again and she parked it because everyone had said it was a head gasket. Until i got to look at the car myself thats what i thought too, that the heads were just expanding when it was driven hard. I dug the car out of the months worth of snow and drove it all day yesterday. The car ran fine except for the following CEL codes. That went away then came back at one point. P0328 Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor) P0156 Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) P0157 Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2) P0063 HO2S Heater Control Circuit Low (Bank 2 Sensor 3) P1872 Rear Left ABS Sensor Signal.... im not sure if thats right? all of these codes seem related to the car knocking but it seems like just replacing the sensor wont be the fix

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02-06-2011, 04:19 PM	#2
munkis Scooby Guru Member#: 1847 Join Date: Jul 2000 Chapter/Region: Tri-State Location: brokenmotorsports.com Vehicle: Team Broken: V6 GF rallyarmor.com	Where did you pull those codes from because the only one that applies to a Subaru is P0328 The rest do not apply there is no bank 2 sensor 2 on an RS, nor bank 2 sensor 3 and there is no 1872 code.

02-06-2011, 04:26 PM	#3
cassinelli23 Scooby Newbie Member#: 198655 Join Date: Dec 2008 Chapter/Region: Tri-State Location: NY Vehicle: 2011 STI White	i got the the codes(the numbers) off of my accessport for my wrx. the definitions i pulled from a website because it was easier to copy and paste. the banks arent right and just the definitions are i believe. ill get the real codes up in a bit

02-06-2011, 04:39 PM	#4
munkis Scooby Guru Member#: 1847 Join Date: Jul 2000 Chapter/Region: Tri-State Location: brokenmotorsports.com Vehicle: Team Broken: V6 GF rallyarmor.com	access port is a terrible code reader. Those are standard OBDII codes, they just do not apply to a 2002 RS. P0156 P0157 P0063 P1872 Go get a real code reader or go to an autozone and have them pull the codes. The only one that applies is P0328 which is for knock sensor circuit issue. Do some searching on here there is plenty of info as it is a common code.

08-24-2011, 12:22 AM	#5
sparkyL Scooby Newbie Member#: 263343 Join Date: Nov 2010 Location: AB, Canada Vehicle: 01 2.5rs	I just pulled the codes from my 2001 2.5rs with an accessport when the CEL came on. As well as the code that I'm presuming is the one I need to address (P0420 - catalyst), I got the same codes P0156, P0157, P0063 and P1872.