OBD-II Code · Sensors
P0113
IAT Sensor High Input
Severity
low
Lowest on our scale. Fix it when convenient.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$50–$200
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
IAT voltage too high.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
- Hard starting when hot
Likely causes
- Failed sensorMost common
- Open circuit
Read the full diagnostic procedureP0113 means IAT signal voltage is above the ceiling — over roughly 4.9V on a standard NTC thermistor, which translates to a reported intake air tempe…
P0113 means IAT signal voltage is above the ceiling — over roughly 4.9V on a standard NTC thermistor, which translates to a reported intake air temperature below -40F. The ECM sees open-circuit, which means either a disconnected sensor, a broken signal wire, or an internally failed thermistor reading open.
Cheapest-first ladder
- visually confirm the IAT or MAF connector is fully seated and the locking tab is intact (this fixes 30-40% of P0113 calls on platforms with weak locking tabs); back-probe the signal wire at the connector engine running at warm idle, must read 2.0-2.5V at 100F intake air, 1.0-1.5V at 150F hot-soak — 5.0V means open-circuit; with the sensor unplugged and key on, jumper the signal and ground pins together at the harness side and watch the scan tool — if IAT reading swings to 250F+, the wiring is good and the sensor is open-circuit internally; if IAT still reads -40F with the jumper installed, the signal wire is broken between the sensor and the ECM and needs continuity testing; verify the sensor ground pin is grounded under 0.1V drop.
- P0113 paired with rough cold-start running means the ECM is calculating fuel for -40F dense air and dumping excess fuel — fix promptly to avoid plug fouling and catalyst overheating.
Vehicle-specific patterns2007-2014 GM 5.3L/6.0L Silverado sees P0113 from the separate IAT connector locking tab breaking and the plug vibrating loose; 2003-2009 Toyota 4Runn…
- 2007-2014GM 5.3L/6.0L Silverado sees P0113 from the separate IAT connector locking tab breaking and the plug vibrating loose;
- 2003-2009Toyota 4Runner/Tacoma 4.0L 1GR-FE with integrated MAF/IAT sees P0113 from internal MAF unit failure where the IAT element reads open-circuit;
- 2005-2010Ford 5.4L 3V sees P0113 from the MAF harness chafe at the valve cover breaking the IAT signal wire entirely;
- 2008-2014VW/Audi 2.0T TSI sees P0113 from the integrated MAP/IAT sensor in the intake manifold failing open-circuit on the IAT element around 80-120k miles.
Estimated repair$15 to $350.
Look up another code
P0113 — frequently asked
What does a P0113 code mean?
IAT voltage too high.
What causes a P0113 code?
Common causes: Failed sensor; Open circuit.
What are the symptoms of a P0113 code?
Typical symptoms: Check engine light; Hard starting when hot.
Is it safe to drive with a P0113 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $50-$200.
How do I diagnose a P0113 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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