I purchased a BlueDriver code reader and have 12 miscellaneous codes that I’m not sure where they came from. They included codes such as Missing Sensor RR and RF. I thought my wheel speed sensors could be out so I purchased another code reader. The new code reader found no ABS codes. This code reader found only code P2221. It came back saying things like “Passenger Squib 2\\\\Circuit open” and “No PCI transmission.” I’m not really sure what’s going on but any help would be greatly appreciated. I included screenshots of the blue driver codes and the other scan tool. Thanks!
2004 Chrysler Pacifica, 80k miles
Either these are some defective readers, or you have some funny business going on with the vehicle computer.
This code reader found only code P2221.
This is a diesel engine code, and I didn't think Pacificas came with diesel engines.
Passenger Squib 2\\\\Circuit open
it helps if you provide the full diagnostic fault, including code number, but this is an airbag code.
Were the airbags ever deployed or removed? Are the seat wiring harnesses all plugged in?
“No PCI transmission.”
Airbag module is not responding to on board diagnostics
Sometimes glitchy problems can happen if you electrical system is in poor health. Have the health of your battery and alternator tested, and make sure all the connections are good.
Then I would clear all the codes and see what comes back.
So I ended up actually inheriting this car
hmm... no such thing as a free lunch, is there?
Maybe you should just sell the thing while it still drives, and before lights do start popping up.
True, but I wish I would’ve done that a few months ago before putting in all this work. I think the issue came is that it was owned by my grandfather and accrued the majority of its miles within the first 10 years. After that, only about 500 miles a year. So maybe just sitting all the time and not being driven enough contributed to all these issues. I’d just like to find out what is going on with these codes and hopefully keep it as a back up as it’s really not worth much buts sentimental meaning.
Don't fall victim to sunken cost logic, and throw good money after bad.
Also, sentimentality and cars usually don't mix. It can put you in the poor house.
Maybe your grandfather would actually be saying "get rid of that pile of crap!"
If you're adamant, then just focus on the rich mixture, but it's going to cost even more time and money.
Ignore all that other stuff. It's not worth your time.
That is very true. Since I’m not having any active warning lights and the car is running smooth I’ll ignore those codes unless something else happens. As far as the rich fuel mixture, I tested the ohms of the fuel injectors while replacing the intake gaskets and they were all identical. Scanned the O2 sensors and it appeared that the upstream o2 sensor was staying predominantly rich but wasn’t alternating back and forth as quickly as I would expect from the .1-.9 volt range. The downstream o2 sensor stayed completely lean from .08-.11 the entire time. I’m assuming the cat is fine as of now, so I’m going to replace both O2 sensors and see if it makes a diffeeence.
if you look in our FAQ under Misfiring, there are some test you can do to check fuel injectors.
Downstream O2 sensors are not used for engine operation. I would be more judicious about what I spend money on.
Well the car isn’t misfiring anymore. That stopped after changing the spark plugs, it’s just running rich. I would assume it could be the upstream O2 sensor but is it not good practice to change both if you’re changing one since they’re both so old?
I understand. I suggested looking in the misfire topic, because that's where the fuel injection videos are.
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The only thing the downstream sensor does it turn on the idiot light, which you have have plenty of already. Again, it will do absolutely zero for the performance of the engine. If you had a newish vehicle, with plenty of life ahead of it, then yeah I'd say go ahead and invest some money into a new downstream O2 sensor and make the computer happy so that way, you will know when more serious problems arise. In your case it is nothing but a waste of money. Or, at the very least, it's not a "need-to-do-right-now" kind of thing. You have more than enough going on with this car already with no end in sight. Make it easier on yourself.
Replace your NOx sensor -
As far as I know, these cars don’t have NOx sensors since they’re not diesels.
Perhaps we could help you if you would please provide ALL the important information about your vehicle, like the engine, transmission, etc.
https://www.obd-codes.com/p2221
Are you sure you gave us the correct dtc code number? You gave us p2221.
So I ended up actually inheriting this car back in May with 70,000 miles. It’s a 2004 AWD Chrysler Pacifica with the 3.5 V6 engine. Since then, I replaced the timing belt, water pump, alternator, upper and lower manifold gaskets, front valve cover gasket, all spark plugs and coils, and thermostat. When I was replacing the plugs, I accidentally snapped the crankshaft position sensor and had to put a new one in as well. For some reason, those 12 codes are always seen on BlueDriver even though there’s no currently active lights. I ended up ordering this Foxscan reader to see if it picked anything up that the BlueDriver didn’t. That’s when the airbag code popped up. Yet, I still don’t know what causes all these random codes that I can’t seem to understand. Car is always running very rich with LFTs at -17% or so. AC compressor is also clattering and seems to have a refrigerant leak. Not sure if any of this is related to all the miscellaneous codes or if it’s something to be worried about. The car was in a minor accident in the front (only cracked plastic bumper) but airbags never deployed.
Forgot to mention, the battery was also replaced back in April prior to me inheriting the car.