Intake Air Temperature Sensor 2 Circuit Low
What it means
P0097 means the signal from intake air temperature sensor 2 is too low, which the computer interprets as unrealistically hot intake air — usually a short to ground in the wiring or a failed sensor. This second IAT sensor helps the ECM adjust fueling for air density. A low reading can slightly skew the fuel mixture, but it doesn't cause a no-start; the practical effect is minor drivability or economy changes until the circuit is fixed.
Can I keep driving? Yes — the engine runs; a low IAT2 signal makes the computer think intake air is very hot, which can slightly affect fueling but rarely stops the car.
Common symptoms
What you'll notice
- Check-engine light on
- Slightly rough running or minor hesitation on some vehicles
- Small change in fuel economy
Common causes
Most likely first
- Short-to-ground in the IAT sensor 2 wiring or connector (reads low)Likely
- Faulty intake air temperature sensor 2 (often built into the MAF or a charge-air pipe)Common
- Loose or corroded connectorCommon
- Failed ECM (rare)Less often
How to diagnose & fix
Work through it in order
- Confirm the code and read IAT2 live data — a low circuit usually reads implausibly hot.
- Inspect the sensor connector and wiring for a short to ground.
- After a cold soak, compare IAT2 with IAT1 and coolant temp; they should read close.
- Replace intake air temperature sensor 2 if it's out of range.
- Repair wiring, clear the code, and retest.
FAQ
Quick answers
Is it safe to drive with P0097?+
Can I just clear P0097?+
Related codes
Often seen with P0097
Read & clear P0097 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.