I'm receiving several codes and curious if it maybe one issue, which is causing codes or are they just individual issues for my 2000 ETC with just over 50k miles. Any advise, would be welcomed.

PCM
P0385 History
P1545 Current
U1152 History *

ACM
B1340 History
B1348 History

IRC
U1301 History

MSM
B2115 History
B2116 History
B2117 History
B2118 History
B0846 History

*Yes, this was under the PCM, not IRC.

year make model of car would help immensely

whoops...2000 ETC!!! just turned 50k miles...again, thanks for any help!!!

P0385H - Crankshaft Position Sensor A (probably hiccup)
P1545C - A/C clutch ground ref. voltage
U1152H - No code listed
B1340H - Left air control door voltage
B1348H - No code listed
U1301H - High voltage on a serial data circuit
B2115 > B0846 - No codes listed.

Clear them and see if they come back next month. Don't get paranoid over H codes.

Thanks Submarine...I have cleared (all) the codes and they come back, immediately. Couple of simptoms: once the car is started (whether cold or hot) the engine will shut off after (about) 10-15 minutes, the a/c will only blow warm/hot air on the driver side and I continue to receive 'low ac refridg' message (even though it's full), and the driver seat/recliner sometimes doesn't work (manually or using the memory)...again, thanks for any help.

replace BOTH CPKs that will fix your stall problem
if you have a low refidg then you either are low or a sensor in the system has gone bad
are you SURE you havent lost the freon?
seat is the least of your concerns right now...

I'll replace both CPK's, thanks... I have check'd the level of the a/c and it appears to be full. just surprised I'm receiving the message-low ac refidg., when the driver side only blows warm/hot air and the passenger blows cool/cold air...?!? I agree, the seat issue can wait. again, thanks!

are you sure its not full of air?
how did you test it?

Ummmm........The B1340 code may lead you to your hot air/cold air problem. Did you read my post ???

when the driver side only blows warm/hot air and the passenger blows cool/cold air...?
Common symptom of low refrigerant in a dual zone system. Have it topped off.