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2003 Ford Explorer-Check engine light with codes lean bank 1 & 2

I have a 2003 Ford explorer Sport. It's a 2 door model. About 3 months ago I got the check engine light. I am the only owner of 6 years. I have never had thsi come on before. Anyway I have still been driving it .Sometimes while driving I can hear the air inside the engine. The codes say lean bank 1 and 2. I have been told it could be a planning gasket? I have no idea but yeaterday it wanted to die on me while idling in park and the idle was rough. Thanks!

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If you hear air in the engine, there must be a leak somewhere.
Check all the vaccum hoses for bad ones or dissconnected ones. All it takes is a pin hole in these darn emission systems to screw up the whole system.
It could also be a leaking intake manifold gasket.

Posted on Jul 13, 2009

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We have a 2001 ford explorer sport. Won't pass


The error code 1131 means the air/fuel mixture is too lean on Bank-1 while 1151 indicated mixture is lean on Bank-2. You can check for the causes of the problem in following link for both error codes (1131 as well as 1151):

http://www.obd-codes.com/trouble_codes/ford/p1151.php

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Code 2195 on ford sport trac 03


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You can find all those on internet

Diagnose & replace all bad COP Ignition Coils --- problem gone

Replace front oxygen sensors on all your vehicles at 100,000 miles
That is required preventative maintenance, unless you don't care about
fuel trim & throttle response

I didn't go into details with the codes-- too much too type

I doubt you can work on it

If you want the long version & do it yourself -- I'll give you that later tonight

Just ask what you want
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1 Answer

I have a 1999 ford explorer sport 4.0 vin E sohc 6cyl. My engine light keeps coming on, I have changed the fuel filter, o2 sensopr,& pcv valves, My question is what is the next step in solving thi


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1 Answer

I have a 4 liter V6 2003 Ford Explorer ( 2 door). The check engine came on and then it started idling rough. When it idles rough the AC blows hot. Recently it has started stalling when idling at a...


Hello! Most probable cause is a leak in the vacuum line or broken elbow connection to the Positive Crankcase Ventilation (PCV) valve...Check PCV and its vacuum line...Send results...

Guru..............saailer

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1 Answer

Check engine light on computer codes 171 174 171-HEGO sensor unable of snitch cylinder bank #1 fuel system at adaptive limit (1990 on) code 174 hego sensor snitching too slow, cylinder bank #1 (1990)


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1 Answer

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5 Answers

Code #P0171 & code #P0174


Look, man here is the deal:
code p0174 - refer to the front cylinder bank
code p0171 - refer to the rear cylinder bank

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