Question about 1999 Pontiac Grand Am GT

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How to fix an o2 sensor - 1999 Pontiac Grand Am GT

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It's mounted into the exhaust pipe before the catalytic converter(s). It will have a wire pigtail plugged into it. You need an oxygen sensor socket to remove it. Spray the corroded metal mounting area with penetrating lubricant, allow that to work for a few minutes, and carefully remove the sensor by unscrewing it with the socket and ratchet wrench.. It will be fairly tight. Installation is the reverse of removal.

Posted on Feb 15, 2012

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How fix O2 sensorP0141


Oxygen sensor is replaceable. Purchase a new one from a parts store, and they can show you where it goes. On most cars, the O2 sensor goes in the exhaust pipe, near the engine.

Dec 21, 2014 | 1997 Plymouth Breeze

2 Answers

Jeep liberty codes


Possible causes
- Warm Up Three Way Catalytic converter deterioration or malfunction
- Exhaust system leaks
- Loose front or rear HO2Ss
- Faulty front heater O2 sensor
- O2 sensors harness is open or shorted
- O2 sensors poor electrical connection
Tech notes
As the code description implies the P0422 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0422 code is combined with other codes, try fixing the other codes first.

Jul 01, 2014 | 2003 Jeep Liberty

2 Answers

2005 Hyundai Tucson 2.7L 2WD


P0430 is a catalyst efficiency code. If there are no leaks in the exhaust or any vacuum leaks that could affect O2 sensor operation and the O2 sensors are working properly then it's possible that you need a catalytic converter. If you have access to a scanner capable of reading live data plug it in and take the vehicle on the high way at a steady 55-60 mph. The O2 sensor should read somewhere around 700 mv give or take but should not fluctuate to much. If it does you need a catalyst bank #2. Good luck!

Apr 10, 2014 | Cars & Trucks

1 Answer

Symptons o2 sensors


If your O2 sensors are malfunctioning, the main symptom would be that the Check Engine light will come on. On some vehicles, an O2 sensor circuit shorted to ground can cause a no-start problem.
If the "Check Engine" or "Service Engine Soon" light is on and there is a code for the O2 sensors, I would like to also advise you that many O2 sensor codes are not caused by the O2 sensors themselves. In many cases, the O2 sensors are only REPORTING the problem. for example, a code P0171 "Oxygen Sensor Lean" code is rarely ever caused by the O2 sensor. It is usually caused by a vacuum leak or a failed Mass Airflow sensor (MAF) or Manifold Absolute Pressure sensor (MAP) or a bad fuel injector. In these cases, repairing the real reason that the engine is running lean will fix the O2 Sensor code without replacing the O2 sensor.

Mar 12, 2011 | 2000 Chevrolet 3500

2 Answers

Check enegine light stay s on all the time, here are the codes im getting, if someone could tell me how to fix these that would be great. p0155 p0141 p0136 p0443 p1451 p0135 p0161 p1409


P0155: O2 Sensor heater Circuit Malfunction (bank2 ) Sensor 1.

P0141: O2 Sensor heater Circuit Malfunction (bank1 ) Sensor 2.

P0135: O2 Sensor heater Circuit Malfunction (bank1,Sensor1)

P0136: O2 Sensor Circuit Low voltage (bank1) Sensor 2.

P0443 : Evaporative Emission control System Purge control valve.

P1451: Eavporative Control System Canister vent solenoid Circuit Malfunction.

P0161: O2 Sensor Circuit Low voltage (bank2,Sensor2)

P1409: Electronic Vacuum Regulator (EVR) control circuit malfunction.

change the O2 sensors first,Then check the the EGR Vacuum regulator for any Malfunction. Good luck

Jan 14, 2011 | Ford Mustang Cars & Trucks

5 Answers

My Service Engine Soon light came on about a year ago. I took it into the shop and got that problem fixed but the light stayed on, so I took it to advance auto parts and code tested it and it said that...


There are several types of O2 Sensor codes. There can be "Lean O2 Sensor" codes, "Rich O2 Sensor" codes, "O2 Sensor Slow Response" codes, or "O2sensor Heater Circuit" codes. The specific code that is being set changes the way you must go about diagnosing and repairing the problem. I will say however, that in about 80% of all the O2 Sensor code problems that I have had to diagnose, the O2 Sensor itself was NOT the problem. The O2 Sensor was only reporting a problem that was actually caused elsewhere. O2 Sensors are the final checkpoint in the engine management system. I think of them like a report card. If the O2 Sensors are right, the rest of the engine management system is right. If the O2 Sensors are not right, the rest of the engine management system is probably not right. (Except in the 20% of the cases where the problem is actually being caused by a failed O2 Sensor)

Dec 04, 2010 | Mitsubishi Galant Cars & Trucks

2 Answers

I have a code po141 what i have to do what piece a have to change in where are this pieces


Code PO141 indicates that the heater circuit in the Oxygen Sensor mounted in Bank 1 (Driver's Side) is not working properly. The ECM has determined that the sensor is taking too long to heat up to around 600 degrees and then switch out of close loop mode. If the ECM determines that it is taking too long then a code PO141 will be set. Normally it is the sensor itself that is defective. Replacing the sensor normally will fix the problem. However it can be the wiring harness or a a bad connection. Check the wiring carefully and look for a short in the wiring. If you find none then replace the O2 Sensor. If this does not repair the problem do not replace any other parts. Time to take it to a professional with professional tools and diagnostic skills to find the problem. The O2 sensor is more than likely the problem but there is no guarantee that will fix it.

Jun 10, 2010 | 2002 Chevrolet S-10

1 Answer

I fix my camshaft sensor cost $548.00 at dealer they said that po133 code (oxgen sensor) need to be replaced but that code did not pull up on my scanner only p1309 what should i do?


The code po133 means o2 sensor checked slow (response 1/1). You will need to replace the o2 sensor to correct the problem. You can purchase the o2 sensor yourself and replace it at home. It's no big problem in doing it yourself unless you want to take it back to the dealer. Hope this will help.

May 20, 2010 | Cars & Trucks

2 Answers

I have a Honda Accord 2003, how can i fix a downstraem Oxygen sensor.. does this affect the gas cosumtion performance.. how can i fix this.. Help.!


o2 sensor is very important part to the engine when it come to the fuel economy. o2 sensor send information to the computer (ECU) which compute and calculate ratio of burnt exhaust gases. if the engine is not run properly either is too lean or too rich the o2 sensor will detect it as the car will triger the check engine light. you can drive the vehicle which will not hurt it as long you can tolerated the light however the car will get terrible gas mileage and poor performance as the ECU will try to lean the engine out itself. o2 sensor is fairly cheap to replace and fix. Let assume the car get 30 mpg on the high way, running with check engine light/bad o2 sensor will change the gas mileage to 18-25 mpg. If the car is V6 make sure you replace o2 on both side. good luck!

Nov 23, 2009 | 2003 Honda Accord

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