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Car Forum / Ford / Ford Trucks / May 20062001 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 > 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" vacuum leak maybe? > 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? Autozone can clear it. > Thanks > > Jack  SignatureDavid M (dmacchiarolo) http://home.triad.rr.com/redsled T/S 53 sled351 Linux 2.4.18-14 has been up 20 days 11:44 > My son's Sport Trac has the following error codes: PO171 and PO174. > Anybody [quoted text clipped - 6 lines] > 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 > My son's Sport Trac has the following error codes: PO171 and PO174. > Anybody [quoted text clipped - 6 lines] > 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 >> My son's Sport Trac has the following error codes: PO171 and PO174. >> Anybody [quoted text clipped - 14 lines] > > 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 > 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) SignatureStephen W. Hansen ASE Certified Master Automobile Technician ASE Automobile Advanced Engine Performance ASE Undercar Specialist http://autorepair.about.com/cs/troubleshooting/l/bl_obd_main.htm http://www.troublecodes.net/technical/ http://www.familycar.com/Alignment.htm |
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