Mdx 08 p2254 - 2008 Acura Mdx

Check the fuses.

Fuse Box Diagram Acura MDX (YD2; 2007-2013)

https://fuse-box.info > acura > acura-mdx-yd2-2007-20...

Here you will find fuse box diagrams of Acura MDX 2007, 2008, 2009, 2010, 2011, 2012 and 2013, get information about the location of the fuse panels inside ...

..

1. Remove the center console. ....
2. Disconnect the 2P connector (A) from the rear blower motor (B), then remove the wire harness clips (C). Remove the self-tapping screws and the rear blower motor from the rear HVAC unit.
   
3. Install the motor in the reverse order of removal.
   

http://www.mdxers.org/forums/73-2001-2006-acura-mdx/47786-mdx-transmission-rear-main-seal-diy-tutorial.html

latch has bolts, mark position before loosing bolts, remove and replace aligning back up with lines, tighten but not to tight, slowly close and then open to check fit

SOUNDS TO ME LIKE A BAD CO2/LAMBDA SENSOR

where is the relay a/c condenser fan location?off 2003 mdx acura?

You can check this website, there is fuse box diagram and description for Acura MDX (2004)

Acura MDX 2004 fuse box diagram Auto Genius

Here it goes.
P2197 - Front Air Fuel Sensor (O2 sensor) Bank 2 - Sensor 1 Signal stuck lean.

P0154 - Front Air Fuel Sensor (O2 Sensor) Bank 2 - Sensor 1 Heater System Malfunction.

P2254 - Front AIr Fuel Sensor (O2 Sensor) VS Line high voltage.

IF Trouble codes P0134 or P0154 are present diagnose them before code P2254.

The first thing I would do would be check the heater circuit. You will have ground, and 12V+ to the 02 sensor heater line on a cold start. This heats up the oxygen quicker and allows it to operate in the correct amount of time. 9/10 times if there is a heater circuit code it is the oxygen sensor. But 1/10 times it is a blown fuse. So checking the voltage at the sensor is a quick test for P0154.

I would backprobe the signal line when the vehicle is at a full operating temp with a graphing meter (if avail) or use a DVOM. You should see it switch between .1 volts to 1V. It should not continuously move up and down. This indicates the computer is in good fuel control.

Diaginosis the heater circuit first is best because code P2197 can be set from anything that can cause that motor to run lean. (Plugged fuel filter, low fuel pressure/volume, vacume leak).

Hope this gives you a solid path to go on & good luck.

Bluetooths have batteries, Rechargeable. If it won't hold a charge replace the batt.

i use to work for honda and acura and from what i recall, the iphone is and or wasnt compatible with the bluetooth sytems(factory) i was haveing trouble pairing a custs iphone in a pilot, then was told its not compatible with that phone