Question about Cars & Trucks
Well, the O2 sensors indiacte they are rich from time to time, which implies they are defective. However, since the fuel pressure sensor is indicating out of bounds signals, I suspect the fuel pressure regulator is defective. Unfortuantely, that thing is part of the fuel pump assembly in the fuel tank. I assuem yours is a 2010 model (you didn't say.) O'Reilly wants about $250 for a new pump assembly. The fuel tank will have to be dropped to access the top of the tank where the pump is located.
You should have the fuel pressure measured at the fuel rail on the engine to see of it is within spec. Likely it is not and a new pump will be in order. Sorry!
Posted on Dec 03, 2014
If you used professional scan tool software, you could look
at the data & maybe figure it out
You can google the codes & read up
All the codes have to do with lose of fuel control & a rich condition
The TPS even with a problem, would not drive your fuel trim so
rich your getting all those O2 Sensor Codes
Look at data
Look at fuel trim
Look at fuel pressure
Look at O2 Switching
Look at TSP Data
Check for vacuum leaks
You could have a lean condition & the fuel system is driven
rich-- thus the rich codes
The 2271 is lack of switch or front to rear bias (only one side- out of range)
There you have to resolve any vacuum leaks,fuel
trim issues,maf issues,ignition problems,etc, then address
the oxygen sensors & converter
I called a lincoln dealer a couple years ago for someone
on here & they had only used or sold 3 or 4 fuel pressure
regulators across all vehicles in their bays, in a 5 year period
So that may never have been the issue
The code who knows,it's a ford
I have seen 6 or more codes on a misfire & hardly any
had anything of value to use or was even related
Install new spark plugs every 3 years
Only use the factory tip config ( OE style plug)
Measure the center electrode & get it right
Install Front O2 Sensors now & every 100,000 miles
Check for vacuum leaks ( use an Evap Smoke machine)
Both banks are effected,so that tells you something, if you have
a vacuum leak or else you have a MAF problem,doubt it
Posted on Dec 03, 2014
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.
New users get to try the service completely Free afterwhich it costs $6 per call 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
P0191 is Fuel Rail Pressure Sensor "A" Circuit Range/Performance
P2196 and P2198 are lean bank 1 and lean bank 2. You normally show lean bank codes if the air-fuel ratio is not correct. The most common cause is a hole in the hoses between the PCV valve and the intake on the motor (back of the motor generally). The fuel rail pressure sensor code could either be caused by the vacuum leak or by a failing fuel regulator. I would first check for holes in the rubber hoses especially where there are right angle rubber hose connectors. Look for soft squishy or oily spots on the hoses.
Posted on Aug 14, 2010
The fuel pressure sounds too low. Is it multi-port injection? Check the fuel pressure against your specs for the car and engine. MPFI systems usually require 40-50 psi.
Posted on Apr 16, 2013
Tips for a great answer:
May 03, 2016 | Toyota Cars & Trucks
May 06, 2013 | Cars & Trucks
Oct 05, 2012 | 2002 Ford Taurus
Sep 23, 2012 | 1996 Buick Skylark
Nov 06, 2011 | 1999 Jeep Cherokee
May 18, 2011 | Chevrolet Tahoe Cars & Trucks
May 12, 2011 | 1998 Jeep Cherokee
May 23, 2010 | 2000 Chevrolet S-10
Oct 31, 2009 | 1993 Chevrolet Cavalier
82 people viewed this question
Usually answered in minutes!