P0111 — Intake Air Temperature Circuit Range/Performance Problem
Can drive — fix at your convenience.
What P0111 means
This code means the intake air temperature sensor is working but reporting readings that don't match what the computer expects, often because the value is stuck or out of its normal range. Typical fixes include cleaning or replacing the IAT sensor, repairing a wiring issue, or addressing a dirty air filter affecting airflow. It's a low-severity code that's usually straightforward and affordable to repair.
Common symptoms
- Check engine light is on
- Minor drop in fuel economy
- Slight hesitation under acceleration
- Engine runs slightly rough at idle
- Harder cold starts in some cases
Common causes
- Intake air temperature sensor reading out of range
- Dirty or contaminated IAT sensor
- Clogged or dirty air filter affecting airflow
- Wiring resistance or corrosion in the sensor circuit
- Air intake leak skewing temperature readings
Typical repair cost
$75 – $220
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0111 code?
Yes, this is a low-severity code and you can typically keep driving normally. The sensor is reading a bit off rather than failing, so you'll mostly notice minor effects like slightly worse mileage. Still, plan to have it checked within a week or two.
How much does it cost to fix a P0111?
Repairs usually fall between $75 and $220. Cleaning the sensor or replacing an air filter is cheaper, while a new IAT sensor adds modest parts cost. Diagnosis time may be included in the shop's estimate.
Is a P0111 code serious?
No, it's one of the milder codes you can get. It affects sensor accuracy and mild engine performance rather than anything that could leave you stranded. Fixing it keeps your fuel system tuned and your light off.
Can a dirty air filter cause a P0111?
It can contribute, since a clogged filter changes how air flows past the sensor and can throw off temperature readings. Replacing a neglected air filter is a cheap first step worth trying. If the code returns, the sensor or wiring is the more likely culprit.