IAT circuit low input
What P0112 means
Your car's computer set P0112: IAT circuit low input. It belongs to the fuel and air metering group of codes. It is a generic code, so it means the same thing on every make. The check engine light usually comes on once the fault has been seen on two drives in a row. Until then it shows up as a pending code.
Can I keep driving? Usually safe to drive. The car may run normally, but it will not pass an emissions test until this is fixed.
Common causes
- Failed intake air temperature sensor
- Unplugged or damaged connector
- Wiring short or open
Fix the cheapest, most likely cause first. Clearing the code without a repair only turns the light off until the fault comes back.
Check it yourself
On a cold start, IAT and coolant temperature should read about the same.
Torque Deck reads P0112 with a cheap Bluetooth OBD2 adapter. It also shows the freeze frame (engine conditions at the moment the code set) and the live data you need to narrow it down.
Parts
Parts most often replaced for P0112: intake air temperature sensor. Confirm the cause first, and match the part to your exact engine.
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Related codes
This page explains what the code usually means. It is not a diagnosis of your car. When in doubt, ask a mechanic.