The Sensor closest to the motor--- is called upstream sensor
On the side of the number 1 cylinder-- is always-- S11
The other cylinder bank is-- S12
The first number is upstream
The second number is also, but the other bank
The rear sensors are called Monitors
They are S21 &S22
So your 12 is upstream sensor, opposite bank or side
of engine of the #1 cylinder
SOURCE: 2005 Dodge Magnum, after replacing battery,cd player won't work
My story Dealing with Dodge
I had a 1994 Dodge Ram. The Red Dodge Ram I had it malfunctioned and my brake became the throttle.
I had to put the truck in reverse then park. to stop, after it was out of control at 80 mph a hill slowed us down. Are you sure
its not electrical and the curse control is not giving you trouble?
Mine had multifunction switch was not working and the headlight switch burned up. I also found out that Audi had problem with the brake becoming the throttle
in the 1980s Daimler Chrysler and Audi were German made. I don't think
there is an easy answer. I hope you stay safe. Another man is having
strange trouble also. I'm sure there are many more people with trouble
with the vehicles. I wish Dodge would step up to the truth. and recall
their nightmares. I saw many of their 1996 Dodge trucks at their
dealers shop with all the electrical pulled out.
SOURCE: 2005 Dodge Magnum w/out hemi stalling
I have a 2005 Magnum and was also having this problem. Stalled out a few times and continued to idle rough and feel like it was going to die when I would slow down. At times it would feel like I would get a hesitation and then a surge. Engine light would go on for a day or so, then go out for a few days. First time I took it in, the dealership told me that it was a broken seal (I don't know where), but they replaced it and it continued to happen. The second time I took it to a mom & pop shop, and they told me that it was the oxygen sensor/altimeter, replaced it (only a $35 part), and I haven't had a problem since. That was 6 months ago. Hope this helps...
SOURCE: 2005 Dodge Magnum error code...
Your heated O2 sensor has a heeater problem most likely. Most likely time to change out your HO2 sensor. Most cars actually have only primary heated. Not sure for this application but would thus assume the primary sensor or otherwise known as precat O2.
With a sensor high you have high voltage back to the pcm thus most likely shorted heating element.
There is an outside chance of a cross short to the ground circuit of your O2 sensor. If after replacing your sensor you still have a problem then start looking for this.
I see you went to the auto parts store and got an HO2 sensor (Should be a 22mm or 7/8" -- same size) and replace the Primary and if that do not solve the problem, then see if you have a heated postcat HO2 if not then see above.
Good luck and hope this helps, oh and Bank 1 is where your #1 cylinder is.
SOURCE: unable to locate the fuel filter on my 2005 dodge magnum 2.7 liter
It's located in your fuel tank.
cheers.
SOURCE: 2005 dodge magnum 3.5 liter engine. 10 deg start engine noise
these have a problem with the overhead cams, one or more of the bolts break which restricts the oil flow to the lifters.
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