I am at wits end with my truck. my truck is saying it is lean on one bank and I can not figure it out. I have replaced the plugs(nightmare) replaced the fuel filter and also replaced the 400.00 fuel pump(another PIA) and the truck is still running like death worn over. It stumbles and pops at idle in park will rev up in park but takes a bit and will only get to around 3,800.
When under load it does much worse than that. I am getting code# 2196?

 

When something appears out of place , it's a good idea to recheck the info.
Where did you get the info that the truck is running lean?
From the little checking I was able to do , There appears to be a discrepancy in our info.

 

The service guy who hooked up his computer to it. I have been poking around a bit today myself and looks like it is an O2 sensor?? maybe my converts? I do not know. All i know is i am ready to pull my hair out!

 

From what I was able to check, and you might want to confirm this, but it could be a rich condition instead of lean.

 

You may want to think this through: a lean condition means not enough fuel in the air. So it could either be a fuel or an air issue or a combination of both.
I would first clean the MAF sensor, then look for vacuum leaks anywhere passed the MAF sensor.
Any vacuum hose, including brake booster hose and PCV hose and even the air intake hose could be cracked and let additional air in. Bad seals around the intake manifold could cause a lean condition.
The EGR system may need cleaning.
Fuel filter, pump and pressure regulator would be my next items to check.

If you have a rich condition the Engine Coolant Temperature sensor may be to blame.

I would not rush into replacing sensors as they are very expensive.

Good luck

 

You may have to get the truck to someone that has the proper test equipment.
There are a few reasons for a stuck rich condition on that left bank. If you have a mechanical problem in one of the cylinders on that left bank and it is not burning the fuel that is injected the o2 sensor will sense that and tell the computer to lean out the mixture. The same can go for a lean condition on the right bank and that o2 sensor will tell the computer to enrich the mixture that the other side is seeing.
I believe you may have more than a sensor problem and that diagnosis isn't worth too much because this type of problem simply can't be diagnosed over the internet.
Lets hope it isn't too expensive to correct and would you share the repair with us when completed? Thanks, hanky

 

I agree with hnaky. P2196 is for a rich code. Look to see if there is any indication of too much fuel getting to the engine. Below is the description and some possible causes from the Ford Manual. Hope it helps in the diagnosis. Each section is listed in order of possible failure. One other thing to check is the Cam Phaser on bank 1 (passenger side) Mine went out at 7,000 miles and had many other codes. Just something to check.

O2 Sensor Signal Biased/Stuck Rich - Bank 1, Sensor 1

Description A heated oxygen sensor (HO2S) indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.

Possible Causes Electrical:
Short to VPWR in the harness or HO2S
Water in the harness connector
Open/shorted HO2S circuit
Corrosion or poor mating terminals and wiring
Damaged HO2S
Damaged powertrain control module (PCM)

Fuel System:
Excessive fuel pressure
Leaking/contaminated fuel injectors
Leaking fuel pressure regulator
Low fuel pressure or running out of fuel
Vapor recovery system

Intake Air System:
Air leaks after the mass air flow (MAF) sensor

Vacuum Leaks
Positive crankcase ventilation (PCV) system
Incorrectly seated engine oil dipstick

EGR System:
Leaking gasket
Stuck EGR valve
Leaking diaphragm or EGR vacuum regulator

Base Engine:
Oil overfill
Cam Timing
Cylinder compression
Exhaust leaks before or near the HO2S(s)