Help! Anyone have issues with P0172 and P219C trouble codes? ("System too rich, bank 1," and "Cylinder 1 Air-Fuel Ratio Imbalance") Any suggestions as to what is causing this and how to fix it? If you had this, what worked for you?

Details as to what we are experiencing below:

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We have a 2019 Honda CR-V EX AWD with almost 90,000 miles.

Over the land weekend, we drove it out of town, long distance on the freeway for about four hours. The next morning when we started it in the hotel park garage, an alert light came on on the dash. The valet in the park garage grabbed a scan tool out of his own car and scanned it.

It was a P0172 "System too rich bank 1".

He cleared the code and we drove it home. On the way home the "Check Engine Light" came. At home I scanned the car with my own scan tool:
P219C

Permanent (and Pending and Confirmed)

Cylinder 1 Air-Fuel Ratio Imbalance
==================The Freeze Frame Report:



DTC that caused freeze frame data Trouble Code P219C triggered Freeze

Frame. Code Def - Cylinder 1 Air-Fuel

Ratio Imbalance

03 Fuel System Status Closed loop - using all oxygen sensor(s) as feedback for fuel control

04 Calculated Engine Load Value 48.6 %

06 Short Term Fuel Trim Bank 1 -10.9 %

07 Long Term Fuel Trim Bank 1 -13.3 %

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While parked, I used my scanner's "live logging" feature to log data while idling it and then revving it slightly for a few seconds.

While both idling (low RPM's) and also slightly revving it (higher RPM's) the fuel trims stayed pretty consistent: with minor deviations, short term fuel trim was at -25, and long term fuel trim at -21.9.
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All recommendations, advice or suggestions welcome! Thanks!

 

I'd be looking at the injectors, Check fuel pressure first.

 

I had to go to my way back memory for this one…
At the turn of the century I had that code on a 3.8L Olds. It turned out to be the MAF sensor, easy fix.

However, the code is the result of a condition that could have a number of causal factors.

I would think that you could look at things like intake blockage, corrosion of O2 sensor connectors and even rodent damage.

Please advise of the solution that worked for you.

Good Luck

 

Someone was suggesting driving a couple of tanks fortified with Techron first. Good idea or bad idea?

 

As grcauto stated it very well could be an injector.

Techron is my go to sauce for injector cleaning so if you wanted to try a cheap fix I would think it would not hurt.

BTW, I saw your Medsr post. No soup for you.

 

I took it to the dealer. It is bad injectors. They need to be replaced. They are quoting me $2,300 for this.

This is just wrong, in my opinion. The car has 89,300 miles. All maintenance has been done at time and at the dealer.

 

I have been using Top Tier gas with Techron. Dealer says that is a good thing and I should keep doing that, but that the injectors are bad and need to be replaced.

And yeah, I need to change my username here to be consistent with what I'm using at other sites! Not sure how I ended up with such a STOOPID name here. What was I thinking?