Dtc P2190

[justinsrad98]

My 09 genesis got a etc P2190. Spark plug are new, new air filter net, throttle body cleaned. Dealer told me everything was in specs and removed the sound foam in the air filter thinking that was the problem... check engine is back on with same code. Anybody ever had the same code? I don't want to spend a 1000$ to fix it!

2190 is system too rich at idle bank 2

 

[dougmcp]

My first guess would be front O2 sensor on bank 2.
Second guess dirty MAF sensor.

 

[Valo_Soul]

I’m having the exact same code on my 2009 Tech Genesis here in Canada. Wondering if it’s worth taking to the dealer.

 

[DSXMachina]

My first guess would be front O2 sensor on bank 2.
Second guess dirty MAF sensor.

I like the MAF theory, it fits. Next I'd look for leaky injectors. Finding a rich fault is usually easier than finding a lean fault. OP, can you pull the plugs in B2 and check for fouling on one plug? This would help narrow down the fault. The bottom line is that we cannot diagnose your problem in this forum. Basically we're giving you professional guesses, none of which are going to be of interest to the pro who fixes your car. You need a scan for cold and hot Short Term Fuel Trim, you also need to see what LTFT is doing and a graph of B1S1, and B2S1 would be helpful. Also I'd look at current draw on the heater in the B2S1. All that means nothing to you, right. It means everything to the professional diagnostician who has to figure out what's wrong. It is rocket science, in fact I'd venture that it's a thousand times more 'science' than what got us to the moon and back. That's the reality with modern cars. In fact your HVAC system alone has more computing power than NASA had on the moon missions.
The air filter thing was totally bogus. First because that would cause a B1 and B2 code, and second, the Upstream sensors would pick that up (If it were really severe) and cut back injector time to end up with a stoichiometric mix.
Can't believe the dealer said that... (I do believe the OP when he said that the dealer said that.)

 

[Gunkk]

A few suggestions to look for:
Dirty/bad MAF.
Dirty/Sticky throttle plate.
Leaky Injector(s).
Bad O2 sensor.

 

[G-864198]

maf would cause a problem with both banks

 

[DSXMachina]

maf would cause a problem with both banks

Almost always. Almost. I've seen bad MAF's show up in one bank only. If the OP had a scanner I'd have asked for a MAF reading. For an 8 cylinder at idle I'd expect 5-7 grams per minute. If it was reading over that I'd have suggested a shot with MAF cleaner, but without any info we (as usual) are just giving our best guesses.
[As long as we're on the subject...wouldn't a fouled MAF sensor read low which would result in the computer shortening injector time which would result in a lean condition? Gunk tends to reduce MAF sensor element heat loss and I believe the Tau sensor reads mass air flow as the amount of current required to maintain a heated element at a desired temperature (resistance). If less current is required then this would be interpreted as less air flow. No?]