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Old 01-25-2017, 04:28 PM   #1
walt
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Default Vue cooling fan issue and codes

I am just about ready to trade in the Vue after 130K almost trouble free miles. The cooling fan kept running even at 20 degree weatheroutseide never stopping. I took it to a shop, paid $500.00 for a new thermostat. The fan stopped running but before I got home the check engine light went back on, so I went back to the shop. The owner said he saw no codes and erased the light. After about 5 miles it went back on but the cooling fan stayed off. This time I decided to take matters into my own hands. I got a scanner and it showed code PO31 oxygen sensor. So I changed the sensor. Erased the light and great right? Wrong. I drove the car about 8 blocks and the check engine light came back on and now the car has a mis in the engine at idle. I checked and now I get code PO171. That tells me it could be anything from a vacuum leak to a fuel injector. The car stinks like raw gas. Any suggestions. The book value on this car is about two grand. I don't want to spend another thousand to find the cause. At some place you just have to walk away, but I am willing to give it another shot.

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Old 01-25-2017, 04:46 PM   #2
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Default Re: Vue cooling fan issue and codes

Which engine, inline 4 cylinder or V6 (3.0, 3.5)? 4cyl engines have two O2 sensors. V6 engines have four O2 sensors, two to each catalytic converter.

P0031 was the O2 sensor issue. P0171 is a lean fuel mixture issue.

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Old 01-25-2017, 07:00 PM   #3
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Default Re: Vue cooling fan issue and codes

Walt - you might want to add "2006 VUE 2.2L" to your profile.

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Old 01-25-2017, 07:38 PM   #4
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Default Re: Vue cooling fan issue and codes

http://www.saturnfans.com/forums/sho...d.php?t=229587

It appears that walt here has an '06 VUE with a 4 cylinder (size not specified).As for pursuing the DTC problem I believe that you should correct it (or them if there be more than one). Bringing a car to a dealership as a trade in with a known and obvious driveability issue will reduce your trade in value. However, when a vehicle gets to having a "book" value as low as you say that yours has then you're better of selling it yourself. You're likely to get more for the VUE from a private party purchasing it than the dealer will give you in a trade.

...
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A leftist, deep-stater will get the nomination for POTUS. What follows if he gets his way? A bad economy, weak military, increased terrorism and a greater RED CHINA.

Last edited by pierrot; 01-25-2017 at 07:52 PM..

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Old 01-26-2017, 11:18 AM   #5
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Default Re: Vue cooling fan issue and codes

Bear with me a moment as I don't understand the original issue...
You say the rad fan was constantly running, even when air temp was 20 deg. So your mechanic changed out the thermostat. Was the thermostat stuck open or closed? The rad fan is going to run regardless of the outside temp as an engine still needs to cool when warm so I don't understand the reasoning behind changing the thermostat. Any abnormality with your temp gauge needle ie. was it showing the engine overheating?

Any check engine lights before you had the themostat replaced?

That aside, I suspect the O2 sensor and lean fuel code is a result of the work done on the thermostat. Perhaps a vac line was not reconnected or knocked loose, etc during the repair. I've seen this happen before on many cars. I suggest not selling the car until you spend a bit of time investigating the 0171 code.

...
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Old 01-26-2017, 12:42 PM   #6
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Default Re: Vue cooling fan issue and codes

Quote:
Originally Posted by Badmotorfinger View Post
Bear with me a moment as I don't understand the original issue...
You say the rad fan was constantly running, even when air temp was 20 deg. So your mechanic changed out the thermostat. Was the thermostat stuck open or closed? The rad fan is going to run regardless of the outside temp as an engine still needs to cool when warm so I don't understand the reasoning behind changing the thermostat. Any abnormality with your temp gauge needle ie. was it showing the engine overheating?

Any check engine lights before you had the themostat replaced?

That aside, I suspect the O2 sensor and lean fuel code is a result of the work done on the thermostat. Perhaps a vac line was not reconnected or knocked loose, etc during the repair. I've seen this happen before on many cars. I suggest not selling the car until you spend a bit of time investigating the 0171 code.
i spent about 2 days working on the Vue. I see NO vac lines broken or loose. The cooling fan goes on when the car throws a code or before it throws a code. After paying the $500.00 for the thermostat the cooling fan stayed off. But the check engine light came right back on . This Time I worked on the car myself. Got a scanner and found code PO31 number 1 oxygen sensor. Replace it, Car ran fine for several blocks. Check engine light came back on and this time with a new code PO171. Cooling fan again running all the time. I called auto parts store double checked the part number, It is correct. I have the right sensor. Did a throttle body cleaning this morning, re checked my past work of the 02 Sensor, everything is hooked up correct and tight. Put fuel injection cleaner in tank drove car, no change. Smell of raw gas is overpowering. I believe it could bad bad fuel injector, or bad ECM. With the book Value of about $1200 I don't want to sink any more money into this car by going to another mechanic, and my mechanic skills are limited. I think I'm screwed. This car still looks new and I always serviced it. It will be a nice car for someone with the skills to take the time to find whats is wrong with it.. I am going to Chevrolet tomorrow since I lease two Malibu's now. If they give me $1,000 toward a new lease on the Vue, I think I will be driving another Chevy by Saturday.

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Old 01-26-2017, 02:02 PM   #7
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Default Re: Vue cooling fan issue and codes

Quote:
Originally Posted by walt View Post
......Got a scanner and found code PO31 number 1 oxygen sensor. Replace it, Car ran fine for several blocks. Check engine light came back on and this time with a new code PO171.......Smell of raw gas is overpowering.
From my 2000 Saturn L Series 2.2L FSM -

DTC P0171 indicates the engine is running lean. The following are possible causes of a lean air/fuel mixture:
*Vacuum leak
*Fuel pressure low
*Fuel quality poor or water in fuel
*Exhaust manifold gasket leak or leak around O2S-1
*Fuel injectors clogged
*O2S-1 weak

To verify the system is running lean, use Scan tool to monitor O2S-2 and HO2S-2. If both sensors are below 300 mV, the system is running lean and the oxygen sensors are probably not at fault.


The fact that you're smelling raw fuel so strongly suggests to me the possibility of a fuel leak. A leak could be large enough to result in low fuel pressure.

...
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Old 01-26-2017, 02:15 PM   #8
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Default Re: Vue cooling fan issue and codes

Walt, sounds like you're frustrated at sinking hard earned $$ into your Vue with no positive results. I get that. Been there myself at times.

I still don't understand the need for the mechanic to replace the thermostat. With the fan always on, even with the engine cold at startup (and without the a/c running), I would have checked the coolant temp sensor rather than gone straight for the thermostat.

Regarding your codes after the thermostat replacement, I still think you have a vac leak somewhere. IIRC, to replace the thermostat on the 2.2L engine, you have to pull the exhaust manifold off. If not sealed properly, this would explain the 031 code and maybe the 0171 as a ghost code.

Wish I could help you more; best of luck to you.

(edit: looks like while I was typing Pierrot posted. Good thoughts on the fuel pressure)

...
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Old 01-26-2017, 09:47 PM   #9
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Default Re: Vue cooling fan issue and codes

Quote:
Originally Posted by Badmotorfinger View Post
Walt, sounds like you're frustrated at sinking hard earned $$ into your Vue with no positive results. I get that. Been there myself at times.

I still don't understand the need for the mechanic to replace the thermostat. With the fan always on, even with the engine cold at startup (and without the a/c running), I would have checked the coolant temp sensor rather than gone straight for the thermostat.

Regarding your codes after the thermostat replacement, I still think you have a vac leak somewhere. IIRC, to replace the thermostat on the 2.2L engine, you have to pull the exhaust manifold off. If not sealed properly, this would explain the 031 code and maybe the 0171 as a ghost code.

Wish I could help you more; best of luck to you.

(edit: looks like while I was typing Pierrot posted. Good thoughts on the fuel pressure)
Thanks for that input. I think I will go back and see the mechanic who changed the thermostat first before going to Chevrolet. Maybe he did not tighten things the way they should of been tightened. Its worth a try.

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Old 01-27-2017, 01:39 PM   #10
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Default Re: Vue cooling fan issue and codes

GREAT NEWS My Vue is fixed. I was sold the wrong oxygen sensor. I was sold and upstream inside of a down stream. ANYONE using a BOSCH Sensor upstrem on a 2006 4 cylinder make sure use part number 19152. Part number 15898 is NOT the correct part even though some store computers say is will work. It wont. It will throw a PO171 Code and you Vue will not run right. Thrilled I can keep my baby for a while longer because it really has been a great truck.

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Old 01-27-2017, 02:27 PM   #11
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Default Re: Vue cooling fan issue and codes

That's great news indeed and I'm very happy for you! BTW, did this also put an end to the raw fuel smell?

...
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Old 01-27-2017, 08:09 PM   #12
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Default Re: Vue cooling fan issue and codes

Glad to hear you're fixed up.

...
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Old 01-27-2017, 08:38 PM   #13
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Default Re: Vue cooling fan issue and codes

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That's great news indeed and I'm very happy for you! BTW, did this also put an end to the raw fuel smell?
YES and the drives that were behind me must be thrilled.

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