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Q:

code P0112 code iat low circuit hooked up to scanner tells me it 419 degrees. on 1998 Honda Accord

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
clear codes engine lite goes out for about 1 second and repost code at same temp, disconnected sensor cleared codes same action about 1 second repost. the original engine over heated serverly ,replaced engine and trans together.possiable the ecm got damaged to overheating temp.
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make sure it is connected in the intake air system and the wires are not broken. if all ok, replace the sensor

Roy
i have replaced with 2 senors case the first one was bad , have a bad pcm unit thank you for reply