Replace MAF Sensor?

[Chrysdriver]

My '99 Catera with only 23k miles runs well but the Service Engine light has been on for awhile. My reader shows two codes -- engine is running lean, both banks. I asked the dealer to check for an air leak and he says there is none. Dealer wants to replace the Mass Air Flow Sensor -- $403 for the part plus 2 1/2 hours of labor.

I'm worried that letting the dealer replace the sensor for $800 bucks is a lot like, when it's too hot inside, replacing the thermometer instead of turning on the AC. Is it reasonable that the recurring twin lean readings are caused by a bum MAF Sensor? Is there anything else that could be causing the warning light/lean condition? Are there any adverse consequences to not spending the big buck$ and continuing to run with the Service Engine light on?

[ctesla]

tried to email you, and not enabled.
did you get this problem taken care of?
if not, merely cleaning the MAF with a non-residual air intake/carb cleaner and resetting the light may fix the problem.
MAF sensors are HIGHLY affected by humidity, and I see by your profile the midwest is just that. Mercedes and Audi/VW have same problems, and the Catera being a German/GM program, stands to reason.

hope it wasn't the $400. MAF, or if it was, you fought like hell for a warranty at 23,000 miles!

[ctesla]

also,
although no "adverse consequences" as you put it from the light on,
if the computer if reading lean, idle may stumble and gas mileage will be affected.
also, if putting many miles on this with the service light tripped, and the ECM holding those codes, the longevity of that 3.0l-V6 could be compromised.
you definitely want to fix the problem.

hope this helps,
ctelsa