For Shop Owners

P2A01 - O2 Sensor Circuit Range/Performance Bank 1 Sensor 2

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Rear Heated Oxygen Sensor Bank 1
  • Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks
What does this mean?

Tech notes

Replacing the rear O2 Sensor bank 1 usually takes care of the problem.
What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

P2A01 Description

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.
OBDII Code P2a01 - O2 Sensor Circuit Range/Performance Bank 1 Sensor 2 - itimaster.ru

P2A01 Information for specific makes

P2A01 BUICK O2 Sensor Circuit Range/Performance Bank 1 Sensor 2
P2A01 CADILLAC O2 Sensor Circuit Range/Performance Bank 1 Sensor 2
P2A01 DODGE O2 Sensor Circuit Range/Performance Bank 1 Sensor 2
P2A01 FORD Oxygen Sensor Circuit Range/Performance Bank 1 Sensor 2
P2A01 GMC O2 Sensor Circuit Range/Performance Bank 1 Sensor 2
P2A01 LINCOLN Oxygen Sensor Circuit Range/Performance Bank 1 Sensor 2
P2A01 MERCURY Oxygen Sensor Circuit Range/Performance Bank 1 Sensor 2

Need more help?

Do you need more help with the P2a01 code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code

P2A01 Comments

Help us improve itimaster.ru. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P2a01 code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

Browse All Codes For Specific Model YearBeta
Ford F150 1998 Ford F150
1999 Ford F150
2000 Ford F150
2001 Ford F150
2002 Ford F150
2003 Ford F150
Ford Fusion 2006 Ford Fusion
2007 Ford Fusion
2008 Ford Fusion
2009 Ford Fusion
2010 Ford Fusion
2011 Ford Fusion
2012 Ford Fusion
Honda Accord 2008 Honda Accord
2009 Honda Accord
2010 Honda Accord
Honda Civic 1996 Honda Civic
1997 Honda Civic
1998 Honda Civic
1999 Honda Civic
2000 Honda Civic
Infiniti G35 2003 Infiniti G35
2004 Infiniti G35
2005 Infiniti G35
2006 Infiniti G35
Nissan Altima 2002 Nissan Altima
2003 Nissan Altima
2004 Nissan Altima
2005 Nissan Altima
2006 Nissan Altima
2008 Nissan Altima
2009 Nissan Altima
2010 Nissan Altima
2011 Nissan Altima
2012 Nissan Altima
Nissan Maxima 2005 Nissan Maxima
2006 Nissan Maxima
2007 Nissan Maxima
2008 Nissan Maxima
Nissan Pathfinder 2005 Nissan Pathfinder
2006 Nissan Pathfinder
2007 Nissan Pathfinder
2008 Nissan Pathfinder
2009 Nissan Pathfinder
2010 Nissan Pathfinder
2011 Nissan Pathfinder
2012 Nissan Pathfinder
Nissan Rogue 2008 Nissan Rogue
2009 Nissan Rogue
2010 Nissan Rogue
2011 Nissan Rogue
2012 Nissan Rogue
2013 Nissan Rogue
Nissan Sentra 2002 Nissan Sentra
2003 Nissan Sentra
2004 Nissan Sentra
2005 Nissan Sentra
2006 Nissan Sentra
2007 Nissan Sentra
2008 Nissan Sentra
2009 Nissan Sentra
2010 Nissan Sentra
2011 Nissan Sentra
2012 Nissan Sentra
Toyota Camry 1997 Toyota Camry
1998 Toyota Camry
1999 Toyota Camry
2000 Toyota Camry
2001 Toyota Camry
2006 Toyota Camry
2007 Toyota Camry
2008 Toyota Camry
2009 Toyota Camry
2010 Toyota Camry
2011 Toyota Camry
Toyota Corolla 2005 Toyota Corolla
Toyota Echo 2000 Toyota Echo
2001 Toyota Echo
2002 Toyota Echo
Toyota Highlander 2001 Toyota Highlander
2002 Toyota Highlander
2003 Toyota Highlander
2004 Toyota Highlander
2005 Toyota Highlander
2006 Toyota Highlander
2007 Toyota Highlander
Toyota Prius 2004 Toyota Prius
2005 Toyota Prius
2006 Toyota Prius
2007 Toyota Prius
2008 Toyota Prius
2009 Toyota Prius
Scion xB 2005 Scion xB
2006 Scion xB
2007 Scion xB
Advertisement
Home - For Shop Owners - About itimaster.ru - Privacy Policy - Terms and Conditions - - Copyright 2010-2018 itimaster.ru
itimaster.ru - - - -
Posted and Edit by 02-16-2017

Related pages


code p03012004 jeep grand cherokee enginehonda odyssey 2000 transmission problemscar code p0141po161 code2001 nissan maxima mass air flow sensor2000 mitsubishi eclipse transmission problemsp0705 transmission range sensor2007 silverado z71 specs07 silverado throttle position sensorjeep wrangler techvtec stand forp0421 mazdatrailblazer appobd code 420bmw x3 coolant warning lightevaporative emission control system leak detected cost to fix itjiffy lube santa fe nmp1698 jeepnissan egrnissan murano faultsgm throttle body problemssolenoid gear shift2004 pontiac grand prix starting problems2004 hyundai sonata problems2003 nissan altima starter2002 bmw 325i check engine lightwhat is a malfunction indicator lampnissan armada brake booster97 jetta clutch2007 dodge caliber check engine light2005 nissan altima air filter1999 passat problemsfaulty ecm99 honda accord shift solenoid1999 nissan altima gxepo316 engine codep0420 subaru outbackronys car pros1998 ford windstar alternatormitsubishi intake manifoldvolvo diagnostic trouble codes2004 yukon reduced engine poweraudi fault codesholden engine codesford focus egr valve problems2000 jeep grand cherokee check engine light2004 nissan maxima fuel filter2006 hyundai sonata timing beltcamshaft position sensor magnet2007 chevy tahoe horsepowerobd2 p11332001 rav4 transmission problems1997 honda civic dx enginenissan quest lengthbmw ignition coil98 chevy lumina mpgford taurus 2001 transmission1996 toyota camry starter2004 mitsubishi galant problemswrx oxygen sensor1998 nissan frontier gas tanktoyota corolla automatic transmission problemssymptoms of bad camshaft position sensortoyota 4runner catalytic converter problemstoyota camry gas cap check engine light2005 buick terraza problemsp0770 shift solenoid e98 honda civic clutch replacementpo174 chevy2001 nissan maxima oil change2004 nissan altima fuel pump2000 nissan maxima problemsradiator coolant sensorp0340 dodge neon96 toyota camry timing beltacura mdx code2005 mazda 3 transmission problems