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2000 Saturn LS Code P0050. Vehicle has no drivability issues. Code related to O2 Sensor circuit. Vehicle has 4 02 Sensors What should I check and replace.

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Code 50 relates strictly to the upstream sensor on bank 2. Causes are bad sensor, wiring, or engine control module. I would check the wire for any damage or loose connection. If none, I would replace that sensor and only that sensor. You can do it yourself if you have a set of metric deep sockets. The parts store should have a diagram to show you where the sensor is. I believe bank 2 is near the firewall and sensor 1 is just below the exhaust manifold (before the cat. converter). More questions, let me know.

Posted on Sep 10, 2010

Testimonial: "Thank you very much, that narrows my search down, I have checked for loose connections etc. It sounds like the one sensor. Much appreciated."

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Depends on what bank it is on 1 or 2 i beleave that bank one stands for the side no# 1 piston is on.then you should have 2 befoe an 2 AFTER THE CYLICSIT convertor.

Posted on Sep 10, 2010

Testimonial: "Thank you very much between your response and another I know pretty much what to check for. Information much appreciated."

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1 Answer

2010 chevy traverse with check engine codep0050


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Read more at: http://www.obd-codes.com/p0157
Copyright © OBD-Codes.com

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4_5_2012_6_18_20_pm.jpg4_5_2012_6_18_37_pm.jpg4_5_2012_6_18_51_pm.jpg

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I have a 2007 Nissan Xterra. Check engine light is on, gas cap gasket has been replaced and the O2 sensors are being replaced tomorrow. Today it would hesitate/slow acceleration when at 40-60mph (2000...


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In most cases the sensor is bad and needs to be replaced. I would try this first since it's the cheapest and easiest route.

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1 Answer

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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.

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2 Answers

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is this a 4 or 6 cylinder?
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V6 will have 4 o2 senors which the sensor will be the right side of the engine first sensor.
1st sensor on exhaust, I recommend if you change one change all, as this will make the computer when it rechecks the system you have all clean/fast responding sensors.

if you have a slow response it means the sensor is dirty and not reading well, which is usually caused by minor misfires that the engine computer dismisses, so a tune up would be recommended too.

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1 Answer

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