Honda Accord Oxygen Sensor P0141, P0135 – Check Engine Light

10:11 am Check Engine Light, Honda, How To Auto Repair
2006 Honda Accord Check Eng P0141 Heater circuit fault B1 S2
 
© DenLorsTools.com  Summary: Auto repair article with information on the Honda Accord check engine light with a fault code of Po441 or P0135. Code definition and location of sensor when this code is stored in the vehicles computer. Car repair tips including how to access electrical plug for oxygen sensor past catalytic converter and which type of specialty is used for the sensor.
 
Oxygen sensor wrench with open slot for wire.
  
OBD II fault code P0141 definition. The error/fault code is for Bank 1 Sensor 2 means that the heated circuit built into the O2 (oxygen sensor) is not functioning as designed – usually an open or shorted circuit. Fault code P0135 has the same definition except it is Bank 1 Sensor 1 which is the sensor before the catalytic converter on a four cylinder. Before the cat on side of engine that has cylinder #1 for 6 cylinders. Normally the O2 sensor is heated up internally to lower the amount of time it takes to reach operating temperature and go into “closed loop.” Vehicles naturally are more efficient when the computer has control of fuel mixture and this is best when the system is in closed loop. With the heater built into the sensor, the car can go into closed loop faster than if it had to wait until the heat of the exhaust warmed the sensor enough for it to work. If the computer sees that it takes too long to go into closed loop and parameters for other circuits (like coolant temp.) are within specification, it will trigger a warning and command the CEL (Check Engine Light) to come on.
 
Specialty Tools
 
Oxygen sensor wrenches and sockets are available to make changing them easier. If the sensor is out in the open, a regular 7/8″ wrench can be used to replace the sensor. Otherwise, specialty tool like an O2 sensor wrench or socket makes removal and installation easier. Sometimes the heat shield can make it more difficult to access. Most sensors require 7/8″ although there may be a few exceptions. The oxygen sensor past the converter on the Accord pictured has a long wiring harness that goes through the floorboard, with the plugin located underneath the right passenger seat. Moving the RF seat all the way forward eases access to the plug. Note that 4 door Accords and 2 door models have different length wiring harnesses. If using ant-seize on the threads of the replacement O2 sensor be careful not to get any on the sensor end, this may affect readings. With a scan tool and a few simple tools usually this repair can be performed by anyone with moderated mechanical skills.
  
 
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8 Responses
  1. Mcderry Moses :

    Date: August 3, 2013 @ 2:04 pm

    Can the p0135, p0141 prevent a car from picking up when accerlated up on? Because my car Honda accord is not picking up at acceleration, there is this 5 seconds delay before it picks up, and when that happens the sound of the car goes low before picking up to normal sound. I can’t overtake any car because it takes about 5 seconds to build up speed. Please help me out. Thanks

  2. dennisb - Auto Tool Sales :

    Date: August 3, 2013 @ 4:42 pm

    No just means the heated portion of the Oxygen sensors are not working. Your delay in acceleration is unrelated. I would first check fuel pump pressure and make sure the catalytic converters are not restricted then go from there. Good Luck.

  3. Mcderry Moses :

    Date: August 3, 2013 @ 4:46 pm

    I changed the fuel pump still the same problem

  4. dennisb - Auto Tool Sales :

    Date: August 3, 2013 @ 4:47 pm

    I would check the fuel pressure anyway. And make sure the exhaust is free flowing.

  5. Mcderry Moses :

    Date: August 3, 2013 @ 4:48 pm

    Please what catalytic converters

  6. dennisb - Auto Tool Sales :

    Date: August 3, 2013 @ 4:55 pm

    The catalytic converter are part of the exhaust (it’s in the picture, the Oxygen sensor is screwed into it). When you take it to the shop I’m sure they will be able to check everything for you. The pressure can be checked using a exhaust back pressure kit screwed into where the Oxygen sensors go. BTW that would be a good time to have yours replaced sense they will be out anyway and you have these codes.

  7. Mcderry Moses :

    Date: August 3, 2013 @ 5:01 pm

    Thank you sir, but the last time I took the car for servicing, the exhaust was checked but it kept showing is p0135,p0141. Please can an exhaust expire? I have change my fuel over six times now, and please what is catalytic converters, please help me out.

  8. dennisb - Auto Tool Sales :

    Date: August 3, 2013 @ 7:46 pm

    If the fuel pump keeps failing, there may an issue like a rusty fuel tank. The codes have nothing to do with the exhaust. As the article says, the codes are for the heater circuit for the Oxygen sensors. The oxygen sensor in the picture also shows the catalytic converter. A restricted exhaust is only ONE possibility of a problem that COULD cause a car to bog and not accelerate properly (may not be your issue). There are many-many things that can cause the problem you are having. Could be injectors clogged, a bad TPS (Throttle Position Sensor), a wiring issue, a BUS Communication issue, ECU problem etc. It’s just not possible for anyone to diagnose without physically working on the car and running some tests and looking the car over in person. I suggest taking the car to the shop and having your technician take a look at it. Sometimes it’s better to pay for a proper diagnosis rather than throwing parts at the problem.

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