Question about 2003 Saturn ION

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Service engine light codes say o2 sensor yet both are new

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  • Bonnie Ya?ez
    Bonnie Ya?ez Feb 22, 2012

    It could be an electrical problem, I would check the wiring diagram, see which fuse feeds in, check the wires for opens. What does the code say exactly?

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  • Saturn Master
  • 2,002 Answers

Check the wires from the O2 sensors for worn insulation and bare spots. They are probably rubbing on the body somewhere and sending false signals to the computer. Hope this helps.

Posted on Feb 22, 2012

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Posted on Jan 02, 2017

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juggernautxt
  • 145 Answers

SOURCE: Code: P0133 - O2 Sensor Circuit Slow Response Bank 1 Sensor 1

is this a 4 or 6 cylinder?
if a 4 cylinder it will only have 2 o2 sensors
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.

Posted on May 06, 2009

abauto
  • 353 Answers

SOURCE: 1998 Saturn SL2 engine light

Possible Causes
The following are malfunctions that could cause a rich condition:
^ Fuel pressure too high. Perform fuel pressure test.
^ Leaking fuel injector(s). - Perform pressure leak down test.
^ Vacuum leak around the MAP sensor grommet.
^ Oxygen sensor contamination.
^ Restricted exhaust or air intake.
^ Fuel Vapor Canister saturated with fuel.

IMPORTANT:
If the front oxygen reading voltage is above 600 mV and the rear HO2S is above 600 mV all the time, the O2 sensors are probably not
at fault.

Posted on Sep 22, 2009

  • 396 Answers

SOURCE: I have a 99 SC2 Saturn that is flashing the

Correct. The one upstream, closest to the engine.

Posted on Jan 15, 2010

  • 1 Answer

SOURCE: Transmission Fluid Temperature Sensor Circuit

I have a 2004 that did not pass the state of Illinois emission test.
The code came back 0711. The check engine light comes on
occassionally but will go out and won't come back on for weeks at a time. Does anyone have a clue?

Posted on Feb 28, 2010

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1 Answer

Engine Service Soon Light On code P0154


Error Code: P0154
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Heated Oxygen Sensor (HO2S) 1 , Bank 2 - No Activity Detected
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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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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)

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1 Answer

2000 windstar service light on


Your van has four o2 sensor's, the code should tell you which one is bad for exsample code should be like,
o2 sensor bank 1 sensor 1 or 2
o2 sensor bank 2 sensor 1 or 2

Also make sure you don't have a vacum leak.

Jun 11, 2010 | 2000 Ford Windstar

2 Answers

Service Engine soon light on - diagnostic code says o2 sensor. What is an O2 sensor and is it hard to replace


You'll need to give us the specific code, in the format P0xxx. Just saying "O2 sensor" doesn't mean anything. It could be the heater circuit, fuse, o2 sensor itself, etc. Changing an O2 sensor isn't too hard but you may not need to replace it/them.

Please report back with the code or look it up at http://www.check-engine-light.com

Nov 13, 2009 | 2002 Pontiac Montana

1 Answer

2003 Grand Prix service engine light on even after new catalytic


I wouldn't have gotten a cat. If the o2s are all replaced, then it could be an EGR valve

Oct 06, 2009 | 2003 Pontiac Grand Prix

1 Answer

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Needs a New Front O2 Sensor.Saturn Also has a updated Re-flash For This DTC. Recommend an OEM sensor for this,lots of issues with aftermarket O2 sensors!!

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SERVICE ENGINE LIGHT


its probably the caytalac converter some times puts the o2 sensor code ere or there is more then one o2 sensor. thanks!!!

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Service Engine soon light Code P0133


I just came from an Autozone, and then spoke with 2 Hyundai dealership service departments and they all three stated the P0113 code is the Intake Air Temperature sensor (IAT, also referred to as the Mass Air Pressure - MAP - sensor) on the engine, not an O2 sensor found in the exhaust system.

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