1999 ford escort zx2 2.0L doc. acctron code P0171 bank 1 lean. what are the possable reasons ?

P0446: EVAP System Vent Control Circuit http://www.autocodes.com/p0446_ford.html

P0135: O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
P0135 Ford O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1

P0141: O2 Heater Circuit Bank 1 Sensor 2
P0141 Ford O2 Heater Circuit Bank 1 Sensor 2

P2195: Oxygen Sensor Signal Biased/Stuck Lean - Bank 1 Sensor 1
http://www.autocodes.com/p2195_ford.html

P0403:Exhaust Gas Recirculation Control Circuit http://www.autocodes.com/p0403_ford.html

P0171: Fuel Injection System Too Lean Bank 1 http://www.autocodes.com/p0171_ford.html

P0171 System Too Lean (Bank 1)
P0174 System Too Lean (Bank 2)
P0301 Cylinder #1 Misfire Detected
P0302 Cylinder #2 Misfire Detected
P0304 Cylinder #4 Misfire Detected
P0306 Cylinder #6 Misfire Detected

Here's a link to code P0171. P0171 OBD II Trouble Code System Too Lean Bank 1 YourMechanic Advice Here's the link to code P0174,sounds as you have a vacuum leak. P0174 OBD II Trouble Code System Too Lean Bank 2 YourMechanic Advice

fault code p0171 is system too lean bank 1.................. intake/exhaust leak. air system MAF/VAF sensor. Fuel pressure/pump , injectors HOS2.

fault code p0174 is system too lean bank 2...................intake exhaust leak, fuel pressure/pump , injector(s) Air system, Hose connectors

hope this helps you

p0708 is transmission range sensor curcuit high output, p0171 is system to lean ( bank 1 ), p0442 is EVAP emission control leak ( small ).

Hello, Its possible the noisy injectory is a problem. The code p0171 is a lean code. This usually means there is a Vacuum leak allowing more air into the engine than fuel. You can take a spray bottle of water and mist the engine while it is running. When you come across the part that is allowing more air into the engine, there should be a RPM change. Fix the part you find.

Usually the p0171 Code is an average of all cylinders on 1 bank of the engine. You could easily have a clogged Injector making the fuel mix lean. There are some kits in which you attach a tank of cleaner to the fuelrail and run the engine on the cleaner until it stalls. You will need to ask an Autoparts store if the kit is available.

In any case, reset the trouble light after making a repair.

P0171 is a LEAN code for cylinder bank 1

P0174 is a LEAN code for cylinder bank 2

That means your car is getting a lot of air and not enough fuel which will make the engine Misfire and rough idle. Well i can say check your mass air flow for any dirt in it and the EGR for any leaks. And also the fuel pump and the fuel lines or any restricted fuel filter. Good luck bro

http://leckemby.net/windstar/windstar01.html

Have you tried a fuel injector cleaner? Lean condition could be caused by clogged injector(s).

P0171=System Too Lean Bank 1,
not cylinder 1,it means the oxygen sensor on the drivers side exhaust was stuck on lean and set a code.
doesn't mean you need to change the oxygen sensor yet,first clear the code and see if it corrected its self.