P0113 Code: What It Means and Repair Cost in 2026
Key Takeaways
- The P0113 code means the intake air temperature (IAT) sensor circuit is sending a high-voltage signal, which the computer reads as roughly minus 40 degrees.
- P0113 repairs cost $40 to $450 in 2026: a standalone IAT sensor runs $40 to $150, wiring repairs $60 to $250, and a MAF-integrated sensor $150 to $450.
- Diagnosis at a shop costs $90 to $150, and on many vehicles the fix is a 15-minute sensor swap near the air filter box.
- Driving with P0113 is safe short-term, but the engine over-fuels, so expect rough cold starts, weaker fuel economy, and a failed emissions test.
- Comprehensive extended warranty plans from Empire Auto Protect can cover engine sensors, wiring, and MAF assemblies.
The P0113 code means the engine computer has detected a high-voltage reading from the intake air temperature (IAT) sensor circuit — the small thermistor that tells the computer how warm the air entering the engine is. When the signal pegs high, the computer assumes the air is around minus 40 degrees, badly skews the fuel mixture, and turns on the check engine light. P0113 is one of the cheaper codes to fix in 2026, ranging from a $40 sensor to a $450 MAF assembly. This guide explains what sets the code, the most likely causes in order, what each repair costs this year, and when coverage can pick up the bill.
What Does the P0113 Code Mean?
P0113 is a generic OBD-II trouble code defined as “Intake Air Temperature Sensor 1 Circuit High Input.” The IAT sensor is a thermistor: its electrical resistance falls as the incoming air warms up. The engine computer feeds the sensor a 5-volt reference signal and reads the voltage that comes back. When that return voltage sticks near the 5-volt ceiling — typically above about 4.9 volts — the circuit is effectively open, the computer interprets the reading as extreme cold, and it stores P0113.
High input means an open or broken circuit, not hot air. Its sibling code, P0112, flags the opposite condition (low input, a shorted circuit). Because the IAT sensor sits in the intake tract — either as its own unit in the intake duct or built into the mass airflow (MAF) sensor — the usual suspects are the sensor itself, its connector, or the short run of wiring between the sensor and the computer.
What Causes a P0113 Code?
A P0113 code is caused by anything that breaks the IAT sensor’s signal circuit, and in most vehicles that means a failed sensor, a corroded or unplugged connector, or a damaged stretch of wiring. Shops see these causes in roughly this order:
- Failed IAT sensor — the thermistor element ages, cracks, or fails open, especially past 100,000 miles.
- Corroded, loose, or unplugged connector — a very common find right after an air filter change, when the duct or MAF plug was not fully reseated.
- Broken or chafed wiring — the harness near the intake duct flexes with every engine movement and can crack a conductor.
- Failing MAF sensor — on engines where the IAT element lives inside the MAF housing, a MAF failure sets P0113 alongside airflow codes.
- Aftermarket intake installation problems — cone-filter kits sometimes leave the IAT sensor loose or poorly grounded.
- Engine computer fault — rare, and only worth considering after the circuit itself tests clean.
How Much Does It Cost to Fix a P0113 Code in 2026?
Fixing a P0113 code costs between $40 and $450 in 2026, depending on which part of the circuit failed. Most drivers land at the low end: a standalone IAT sensor is an inexpensive part that sits in easy reach near the air filter box, and many shops can test and replace it inside half an hour. Costs climb when the sensor is built into the MAF assembly or the wiring needs surgery.
| Repair | Parts + Labor (2026) | Notes |
|---|---|---|
| Reseat unplugged connector | $0 – $45 | Free if you spot it yourself; minimal shop time otherwise |
| Diagnosis (scan + circuit test) | $90 – $150 | Often credited toward the repair |
| Standalone IAT sensor replacement | $40 – $150 | Part is $15 to $60; labor is minimal |
| Connector / pigtail repair | $60 – $250 | Replaces the corroded plug and splices new leads |
| Wiring harness section repair | $120 – $350 | Depends on where the break hides |
| MAF sensor assembly (integrated IAT) | $150 – $450 | See our mass airflow sensor cost guide |
Current ranges for more than 100 other common repairs are aggregated in our State of Car Repair Costs report.
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How Do Shops Diagnose a P0113 Code?
Shops diagnose a P0113 code by comparing the IAT reading against reality, then testing the sensor and its circuit before replacing anything. The process usually follows these steps:
- Read the live IAT value with a scan tool. A reading of minus 40 on a mild day confirms the circuit is open somewhere.
- Inspect the sensor and connector in the intake duct or MAF housing for corrosion, bent pins, or a plug left loose after an air filter service.
- Test the sensor’s resistance with a multimeter and compare it to the spec for the current temperature.
- Check the wiring between the sensor and the computer for breaks, chafing, or rodent damage, wiggling the harness while watching the live reading.
- Replace the failed part — sensor, pigtail, or MAF assembly — then clear the code and confirm the live reading tracks the weather.
The order matters because the cheap causes are also the common ones — paying for a $450 MAF assembly when the real fault was a $20 sensor or a loose plug is the expensive way to fix this code.
Can You Drive With a P0113 Code?
Yes, you can drive safely with a P0113 code in the short term. The engine will not stall or lose oil pressure. But because the computer believes it is feeding arctic air, it richens the fuel mixture well beyond what the engine needs. The symptoms follow from that: rough or surging cold starts, a noticeable drop in fuel economy, occasional black exhaust tinge, and in most states an automatic emissions-test failure while the check engine light is on. Long-term, constant over-fueling can shorten the life of spark plugs and the catalytic converter, so plan the repair within a few weeks. If the code appeared together with a temperature-gauge complaint, note that the engine coolant side has its own sensor and its own codes — see our P0128 code guide and coolant temp sensor cost guide for that circuit.
Does an Extended Warranty Cover P0113 Repairs?
An extended warranty covers P0113 repairs when the plan includes engine electrical components such as sensors, wiring, and the MAF assembly — coverage that comprehensive and exclusionary plans typically provide. Diagnosis performed as part of a covered repair is usually included as well.
Because Empire Auto Protect is a broker working with multiple administrators, its licensed agents can match you to a plan tier where engine management sensors, connectors, and related electrical parts are covered, with deductibles from $0 to $200 and acceptance at any ASE-licensed shop. Plans start at $69 per month, and every plan carries a 30-day money-back guarantee. For how these plans stack up against other providers, see our best extended car warranty companies rankings.
Frequently Asked Questions
Can I fix a P0113 code myself?
Often, yes. On many vehicles the IAT sensor sits in the intake duct within easy reach: unplug the connector, check for corrosion, and swap the sensor with basic hand tools. The part costs $15 to $60. If the sensor is built into the MAF housing or the live reading does not change with a new sensor, the wiring needs a proper circuit test.
What is the difference between P0113 and P0112?
Both involve the intake air temperature sensor circuit. P0113 flags high input — an open circuit the computer reads as extreme cold — while P0112 flags low input, a shorted circuit the computer reads as extreme heat. The diagnosis is similar; the electrical fault is opposite.
Will a P0113 code fail my emissions test?
Yes, in most states. An illuminated check engine light is an automatic emissions failure in the majority of inspection programs, and the rich fuel mixture P0113 causes can also push tailpipe readings out of range. Fix the code before your test date.
Is the IAT sensor part of the mass airflow sensor?
On many modern engines, yes. Manufacturers often build the IAT element into the MAF sensor housing in the intake duct. On those vehicles a P0113 fix can mean replacing the whole MAF assembly at $150 to $450, rather than a standalone $15 to $60 sensor.
Is a P0113 repair covered by an extended warranty?
Usually, under comprehensive plans: IAT sensors, MAF assemblies ($150 to $450), connectors, and engine wiring are covered components on many tiers Empire Auto Protect offers. Simple maintenance items like air filters remain the owner’s responsibility.
The Bottom Line on P0113
A P0113 code is an open circuit in the intake air temperature sensor, not an emergency — but it quietly wastes fuel, fouls cold starts, and guarantees an emissions-test failure until it is fixed. Check the connector first, test the sensor second, and expect $40 to $450 depending on whether the fault is a standalone sensor, the wiring, or a MAF-integrated unit. An extended warranty from Empire Auto Protect can cover sensor and electrical repairs like these for as little as $69/month.
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