Nissan Check Engine Code
P0113 on Nissan
Intake Air Temperature (IAT) Sensor 1 Circuit High
Also covers: Infiniti
P0113 on Nissan: what makes it different
Nissan's intake air temperature (IAT) sensor — often integrated into the mass airflow sensor housing — is a frequent source of high-input codes on Nissan's popular 4-cylinder and V6 engines due to connector and wiring exposure near engine heat.
Most-affected engines
- QR25DE 2.5L 4-cylinder (Altima, Sentra, Rogue)
- VQ35DE/VQ40DE V6 (Altima, Maxima, Frontier, Pathfinder)
- MR20DE 2.0L 4-cylinder (Sentra, Rogue)
Common model years: 2007–2018
Most likely cause on Nissan
Corroded or heat-damaged wiring/connector at the MAF/IAT sensor housing causing an open circuit that reads as an unrealistically high (cold) input.
Known Nissan engine-family issues
On many Nissan 4-cylinder and V6 engines, the IAT sensor is built into the MAF sensor housing rather than being a standalone part, so a wiring or connector fault at that single location can trigger IAT-specific codes even though the airflow reading itself seems normal.
Nissan-specific causes (most common first)
- Damaged or corroded wiring harness connector at the MAF/IAT sensor, often from engine bay heat exposure
- Failing integrated MAF/IAT sensor unit itself
- Aftermarket or dirty air filter causing airflow readings that skew IAT circuit voltage
- Poor ground connection near the sensor harness
- Intake tract air leak causing unmetered air to affect sensor readings indirectly
Nissan-specific diagnostic tip
Since the IAT sensor is usually integrated with the MAF unit on Nissan engines, check for a high resistance or open circuit at the MAF/IAT connector first — wiggle-test the harness with the engine running and watch live IAT data on a scan tool; a sudden jump to an extreme temperature reading points to a wiring fault rather than the sensor element itself.
Symptoms drivers report
- Check engine light
- Slightly rich or lean running
- Minor drop in fuel economy
- Mostly drivable with no obvious symptoms
Typical repair cost on Nissan
Most Nissan owners fix P0113 for between $90 and $280, depending on which underlying cause turns out to be at fault. Start with the most-likely cause for your vehicle — Corroded or heat-damaged wiring/connector at the MAF/IAT sensor housing causing an open circuit that reads as an unrealistically high (cold) input. — before throwing parts at it.
Nissan P0113 FAQ
Is the IAT sensor separate from the MAF sensor on Nissan engines?
On most Nissan 4-cylinder and V6 engines covered by this code, the IAT sensor is built into the MAF sensor housing, so diagnosing P0113 often means testing that combined unit and its wiring rather than a standalone sensor.
Can a dirty air filter cause P0113 on a Nissan?
Indirectly — a heavily clogged or improperly seated aftermarket filter can alter airflow and temperature readings enough to trigger a high-input code, though a wiring or connector fault is more commonly the root cause.
Will P0113 cause noticeable drivability problems on my Nissan?
It can cause the ECU to default to a preset air temperature value, sometimes leading to slightly rough cold starts or minor fuel trim changes, but most vehicles will still drive normally with the light on.
Related codes
Drive a different make? See the general P0113 guide for cross-vehicle causes and symptoms.
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