2001 Explorer Sport Trac error codes

My son's Sport Trac has the following error codes: PO171 and PO174.
Anybody
able to assist in identifying the cause? The breakout (based on the
Autozone
tester) said "System too lean"
69800 miles on the V-6 4.0 2WD
Check engine light came on when stuck in a Florida Interstate traffic
jam (1
1/2 hour at a crawl).
Is there a way to clear the check lite to see if the fault comes back?

Thanks

Jack

"Jack" > wrote in message
oups.com...
> My son's Sport Trac has the following error codes: PO171 and PO174.
> Anybody
> able to assist in identifying the cause? The breakout (based on the
> Autozone
> tester) said "System too lean"
> 69800 miles on the V-6 4.0 2WD
> Check engine light came on when stuck in a Florida Interstate traffic
> jam (1
> 1/2 hour at a crawl).
> Is there a way to clear the check lite to see if the fault comes back?
>

The AutoZone tester can reset the light for you. Press the Reset button. I'm
not sure what can cause a "too lean" condition, but I'd not hesitate to
reset the code and wait for it to return. I do not foresee any "safety of
flight" issue here by waiting for the code to return. It might not come
back, which is what you want. If it does come back, then you can expend the
energy to figure out what's wrong.








> Thanks
>
> Jack
>

In article .com>,
Jack > wrote:

> My son's Sport Trac has the following error codes: PO171 and PO174.
> Anybody
> able to assist in identifying the cause? The breakout (based on the
> Autozone
> tester) said "System too lean"
> 69800 miles on the V-6 4.0 2WD
> Check engine light came on when stuck in a Florida Interstate traffic
> jam (1
> 1/2 hour at a crawl).
> Is there a way to clear the check lite to see if the fault comes back?

I can't answer your question... but someone at

http://www.mysporttrac.com/

sure will. Great site for ST owners!

HTH

"Roadie" > wrote in message
...
> In article .com>,
> Jack > wrote:
>
>> My son's Sport Trac has the following error codes: PO171 and PO174.
>> Anybody
>> able to assist in identifying the cause? The breakout (based on the
>> Autozone
>> tester) said "System too lean"
>> 69800 miles on the V-6 4.0 2WD
>> Check engine light came on when stuck in a Florida Interstate traffic
>> jam (1
>> 1/2 hour at a crawl).
>> Is there a way to clear the check lite to see if the fault comes back?
>
> I can't answer your question... but someone at
>
> http://www.mysporttrac.com/
>
> sure will. Great site for ST owners!
>
> HTH

Have to agree, the above sight has great info. On this code, there is an
elbow that splits and causes the to lean condition, everytime this code has
occurred, the elbow has been the problem. Go to the sight and search on your
code, there will be pictures of the elbow.

Gerry

I forgot my error code. But it has somthing to do with the transmission.
Took it to the transmission place and they told that the transmission was
contaminated. what can cause this problem

>
> Have to agree, the above sight has great info. On this code, there is an
> elbow that splits and causes the to lean condition, everytime this code
> has occurred, the elbow has been the problem. Go to the sight and search
> on your code, there will be pictures of the elbow.
>
> Gerry
>

Seen this allot on fords, something in the PCV system splits, lets unmetered
air into the system, and the o2 sensors trigger the lean code.
Look for and find the vacuum leak; write back if you look and don't find it
for long term problem can start from this.
The sport trac is seeing a lean condition, and will start pumping up the
injector times to add more fuel to comp for it until it reaches the fuel
trims limits, then another code will be added. So gas mileage will be
looking south and you could clog or damage the cat (long term)



--
Stephen W. Hansen
ASE Certified Master Automobile Technician
ASE Automobile Advanced Engine Performance
ASE Undercar Specialist

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