Mine did it after a couple of days of deep water crossings.I pulled the plug off the back of it and blew it out & gave the connection a good clean out & seemed to be ok
It was reading low like yours.
Been ok ever since
If yours continues to play up,you could check the resistance,and check another at a similar temperature & it should be the same,or someone may have a resistence chart for it.
Its pretty important it is correct as i think it is the air sensor for the ECU's,etc
Good Luck




				
				
				
					
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