Question about 2003 Saturn VUE

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SATURN OF KNOXVILLE SAID THAT THEY ARE SWAYING TO THE COMPUTER OF THE CAR BUT WHEN I WENT TO AUTO ZONE THEY SAID THE DIAGNOSTIC SAID IT WAS THE O2 SENSOR. SATURN ALSO SAID WHEN THEY STARTED THEW CAR UP IT WOULD CRANK BUT IT WOULD DIE ON THEM WHEN THEY DROVE IT

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  • Saturn Master
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Hello! Since I do not know which engine is in the vehicle, I'll base my solution on the 4 cylinder...The O2 sensor is more than likely contaminated...This particular sensor can lie to the
computer...Generally it reacts to another fault...Cause and effect...The cause may very well be to rich of a fuel/air mixture...The effect is a contaminated O2...The engine will start but then stall when attempting to accelerate...I suspect a faulty Manifold Absolute Pressure (MAP) sensor...It is called the "fuel boss"...Request that the MAP be tested before the computer is changed...A wee bit of knowledge can save you a lot of money...There are three wires in the MAP connector...Orange/Black...Light Green...And Gray...With key on...The voltage across Light Green and Gray must read 5 volts...If it reads much less than 5 volts it is defective...It can be purchased for $93 at Auto zone or $75 (shipping included) at www.rockauto.com...If you want to test it yourself send a comment and I'll guide you.............Guru............Saailer





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Posted on Jul 15, 2010

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  • Saturn Master
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I would trust the dealer over Autozone if they experienced these problems. However, if the car is running an the O2 sensor code was stored, go for that first.

An O2 sensor will not cause a driveability problem until the car is warmed up as the O2 sensor doesn't come into play until the exhaust is good and hot.

If the car cranks but dies on them when cold, then it's the crank sensor or computer in that order.

Good luck to you.

Posted on Jul 15, 2010

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More than likely the catalytic converter has failed. the computer looks at the downstream O2 sensor to determine if the cat is working. If it sees the downstream O2 starting to switch back and forth like the upstream O2 or read consistently higher than it should than it will flag the P0420 code.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

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I recently bought a Saturn for my daughter. The car had a hard starting problem (it crank and crank before firing). I got on this site and one possible solution was the temp sensor for the computer. The original unit has a plastic tip that cracks and lets coolant into the electronics. As a temp related problem I would suggest you check or change the temp sensor. At my local Auto Zone the part cost $8.99, so its not an expensive gamble.

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1 Answer

I went to the inspection station and they failed my car for this diagnostic problem p0134 which makes the check engine light come on


A code P0134 may mean that one or more of the following has happened:
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The most common fix is to replace the oxygen sensor (O2 sensor). But that doesn't rule out the possibility of:
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If you go to Auto Zone, you can pick up the O2 sensor and they can give you the step by step instruction to replacing the upstream O2 sensor. "before the catalytic" If you don't have a O2 sensor socket, Auto Zone has that as a loner tool or you can buy one for around $8.99. But your better off using the loner tool and can replace the O2 sensor your self there in about 30 min, could be quicker but the engine may still be to hot to work on. Good luck

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first problem, went to autozone. the guy that looked at your car was making pizzas last week. they pull codes and sell you every part you will buy. take the car to the saturn dealer and replace the bcm.

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take you car over to auto zone or one of the part stores that do the free computer test. They will do it for free and sell the part to you for way less money.

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Go to your local auto zone parts store, they have a free service where they will hook your car up to a dianostic computer and tell you what fault code is comming up. Then you can work on the correct problem. Also some cars have more than one O2 sensor, so it could still be a O2 sensor. Get the diagnostic check first. If you don't have a Auto Zone go to Advanced Auto, or start calling the part stores in your area and see if they offer this service, AMMCO offfers this service for free also.

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