Question about 1999 Ford Explorer
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: Upstream O2 sensor location?
That is the first sensor closest to the engine. The downstream sensor is the one behind the converter.
Please rate this response , and let me know if ya need more help!
Posted on Aug 31, 2008
Upstream, as in ahead of the converter, back toward engine. Start at converter and work your way back, should be on exhaust pipe or even on manifold.
Posted on Jan 11, 2009
oxygen sensor, vacuum leak, and yes it could most definitly be if you swaped the wires of the firing order accidently you will get a code p0171 Check the tubing going from the air filter to the intake manifold to see if it has come loose. This might account for extra air going into the intake manifold than the computer is aware of. Otherwise it may be due to a faulty(or dirty) MAP/MAF sensor. Another possible cause is from low fuel pressure due to restricted fuel lines or a bad fuel pump.
Posted on Jul 28, 2009
SOURCE: Check engine light
Sometimes can be prematurely dirty air filter, sets off the air flow sensor, which sets off the o2 sensor. So might try new air filter first and erase codes and then see, before you spend more bucks than you need; then if codes return, do the flow mix sensor.
Posted on Feb 11, 2010
Tips for a great answer:
Feb 03, 2018 | Cars & Trucks
Apr 19, 2015 | Cars & Trucks
Mar 06, 2015 | Cars & Trucks
Mar 17, 2014 | 2000 Lincoln LS
Apr 22, 2012 | 1996 Ford Explorer
Oct 11, 2010 | Ford E-150 Cars & Trucks
Sep 22, 2009 | 2003 Pontiac Vibe
Apr 19, 2009 | 2006 Honda Civic Hybrid
51 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: