Help with bank 1 sensors.

Mpaul91 · 11-20-2016, 05:20 PM

Had a bank 1 sensor 1 code a couple weeks ago figured the sensor was just bad and replaced it 3 weeks later now i have a bank 1 sensor 1 and bank 2 sensor 1 codes. What could be causing this i have a 2010 z with just under 62k on it also the back o2 sensors have extended bungs and im running berk hfc.

RanRich · 11-20-2016, 06:01 PM

Did you replace the bad sensor with the Nissan OEM one or an aftermarket? There have been reports of continued codes if the sensors are not identical units.

The HFC wouldn't have any effect on the sensor 1 codes as upstream O2's are located in the header collector

Mpaul91 · 11-20-2016, 08:02 PM

Only replaced bank 1 sensor 1 and it was oem replacement, and posted the hfc and extended bungs for any issue that should throw all four the back too wont trip.

gomer_110 · 11-20-2016, 10:08 PM

What is (are) the actual codes? Did you use any power tools when you replaced the sensor?

RanRich · 11-21-2016, 08:49 AM

I have this same code and have some Denso replacement sensors from Rock Auto sitting on my shelf at home because I'm dreading trying to get the old ones out.

Just as a formality, you did disconnect the battery during/after install right?

Mpaul91 · 12-09-2016, 02:14 PM

the codes its throughing are P2A00 x3 and P2A03 x2

gomer_110 · 12-10-2016, 10:13 AM

Look for leaks in the intake system between the MAF and heads and for leaks in the exhaust between the heads and the primary O2 sensors. If the sensors were actually bad you'd most likely have other codes showing up.

11-20-2016, 05:20 PM	#1 (permalink)
Mpaul91 Base Member Join Date: Jul 2014 Location: Rhode island Posts: 14 Drives: 10 370Z BC M6 Rep Power: 10	Help with bank 1 sensors. Had a bank 1 sensor 1 code a couple weeks ago figured the sensor was just bad and replaced it 3 weeks later now i have a bank 1 sensor 1 and bank 2 sensor 1 codes. What could be causing this i have a 2010 z with just under 62k on it also the back o2 sensors have extended bungs and im running berk hfc.

11-20-2016, 06:01 PM	#2 (permalink)
RanRich Enthusiast Member Join Date: Mar 2015 Location: St. Louis Posts: 425 Drives: 09 PG Sport M6 Rep Power: 3372	Did you replace the bad sensor with the Nissan OEM one or an aftermarket? There have been reports of continued codes if the sensors are not identical units. The HFC wouldn't have any effect on the sensor 1 codes as upstream O2's are located in the header collector __________________ AAM \| Dynosty \| Ecutek \| Eibach \| Hawk \| H&R \| Nismo \| Stillen \| Stoptech \| Z1

11-20-2016, 10:08 PM	#4 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36940	What is (are) the actual codes? Did you use any power tools when you replaced the sensor? __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

11-21-2016, 08:49 AM	#5 (permalink)
RanRich Enthusiast Member Join Date: Mar 2015 Location: St. Louis Posts: 425 Drives: 09 PG Sport M6 Rep Power: 3372	I have this same code and have some Denso replacement sensors from Rock Auto sitting on my shelf at home because I'm dreading trying to get the old ones out. Just as a formality, you did disconnect the battery during/after install right? __________________ AAM \| Dynosty \| Ecutek \| Eibach \| Hawk \| H&R \| Nismo \| Stillen \| Stoptech \| Z1

12-10-2016, 10:13 AM	#7 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36940	Look for leaks in the intake system between the MAF and heads and for leaks in the exhaust between the heads and the primary O2 sensors. If the sensors were actually bad you'd most likely have other codes showing up. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

11-20-2016, 08:02 PM	#3 (permalink)
Mpaul91 Base Member Join Date: Jul 2014 Location: Rhode island Posts: 14 Drives: 10 370Z BC M6 Rep Power: 10	Only replaced bank 1 sensor 1 and it was oem replacement, and posted the hfc and extended bungs for any issue that should throw all four the back too wont trip.

12-09-2016, 02:14 PM	#6 (permalink)
Mpaul91 Base Member Join Date: Jul 2014 Location: Rhode island Posts: 14 Drives: 10 370Z BC M6 Rep Power: 10	the codes its throughing are P2A00 x3 and P2A03 x2

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