P0113 Code: Toyota Camry (2018-2024) - Causes, Symptoms & Fixes

Below is a comprehensive diagnostic guide for P0113 (Intake Air Temperature Sensor 1 Circuit High Input) as it may apply to 2018–2024 Toyota Camry models. Note that the data you provided from NHTSA includes one complaint for a different code (P0442) and contains no recalls for this model in the dataset. No recalls found in NHTSA database. The guide uses general automotive knowledge for P0113 and Camry-specific considerations, but actual Camry variants (2.5L 4-cyl vs. 3.5L V6, etc.) can change exact sensor locations and replacement costs.

CODE MEANING AND SEVERITY

• Code: P0113 means the Intake Air Temperature (IAT) Sensor 1 circuit is reporting a higher-than-expected input to the Engine Control Module (ECM).
• What it implies: The ECM uses the IAT reading to adjust fuel trims and timing. A high input can cause the PCM to over-fuel or under-fuel under certain conditions, leading to drivability issues.
• Severity: Moderate. It can cause poor acceleration, reduced fuel economy, or rough idle, and may illuminate the check engine light. If left unresolved, it can contribute to drivability issues in hot or cold conditions and may trigger other codes (lean/rich conditions, misfires, etc.).

COMMON CAUSES ON TOYOTA CAMRY

• Faulty IAT sensor itself (stuck high, damaged pins, moisture ingress).
• Damaged or corroded wiring, harness, or connector between the IAT sensor and the ECM (pin damage, shorts to ground or 5V reference).
• Vacuum or intake leaks near the sensor/MAF area (cracked hoses, loose clamps) that alter readings or cause erroneous sensor input.
• Contaminated or dirty MAF sensor or intake path (in many Toyotas, IAT data is read alongside MAF; a dirty MAF can complicate readings).
• Faulty ECM/PCM or improper 5V reference supply (rare, but possible).
• Aftermarket intake systems or modifications that alter airflow and sensor readings.
• Intermittent electrical issues or poor grounding in the engine bay.

SYMPTOMS YOU MIGHT SEE

• MIL/Check Engine Light illuminated (P0113 stored or pending).
• Rough idle or stalling, especially at startup or during cold start.
• Reduced or erratic acceleration or hesitation.
• Decreased fuel economy or unusual fuel trim behavior.
• In some cases, related codes such as P0101 (MAF issues) or P0171/P0174 (lean conditions) may appear if readings are off enough to affect fuel trims.

DIAGNOSTIC STEPS

Note: Start with the simplest checks and move to electrical/sensor testing if the code persists.

A. Verify and document

• Use an OBD-II scan tool to confirm P0113 and note any related codes (P0112, P0101, P0171/174, P0300, etc.). Check freeze frame data to see engine RPM, load, temperature, and IAT value at the time of fault.

B. Visual inspection

• Inspect the IAT sensor and its connector for corrosion, bent/pused pins, damaged housing, or moisture.
• Inspect the wiring harness for chafed insulation, tugging, or loose grounds near the sensor and the ECM connector.
• Inspect intake hoses, clamps, and any vacuum lines for leaks or cracks, especially near the sensor housing or MAF area.
• Check for aftermarket components that might affect airflow readings.

C. Sensor and circuit checks

• IAT sensor location: On many Camry applications, the IAT sensor is located in the intake tract near the throttle body or integrated with the air intake path. Exact location may vary by engine (2.5L vs 3.5L) – refer to the service manual for your engine.
• Electrical test (if you have the tools):
  • With the engine off, disconnect the IAT sensor connector.
  • Check the 5V reference and ground circuit from the ECM using a multimeter (the sensor requires a 5V reference and a ground; miswiring can trigger P0113).
  • Measure the resistance of the IAT sensor terminals at various known temperatures (use an ambient reference at roughly 20–25°C to start). Compare readings to the OEM specifications for your engine. If the resistance at room temperature is far outside spec or does not change with temperature, the sensor is faulty.
  • Reconnect the sensor and use a scan tool to monitor live IAT readings. With the engine off, the IAT value should roughly match ambient air temperature. After warming up, the IAT should rise with air temperature; if the reading is abnormally high at ambient or does not respond to temp changes, suspect a bad sensor or wiring.
• Check the 5V reference and ground integrity:
  • A parasitic drain or an intermittent ground can create false high readings. Wiggle test the wiring and connectors with the engine running (careful not to short anything) to see if the IAT reading flickers.
• Vacuum/air path check:
  • With the intake system installed, verify there are no unmetered air leaks after the MAF, which can cause the ECM to misinterpret IAT data as an out-of-range value.
• If the IAT sensor and wiring test OK:
  • Consider cleaning or inspecting the MAF and air intake path, since some Camry models use a shared sensor signal path, and a dirty MAF can exacerbate readings. Replace/clean as needed.

D. Confirm the fix

• After replacing a faulty IAT sensor or repairing wiring, clear the codes and drive the vehicle under various loads and temperatures to confirm the code does not return.
• If P0113 reappears after sensor and wiring checks, expand diagnostics to the PCM and related sensors (e.g., MAF) and consider testing PCM power/ground reliability and possible software updates.

RELATED CODES (context for diagnosis)

• P0112: IAT Sensor 1 Circuit Low Input (may indicate a weak signal, wiring fault, or sensor failure).
• P0100–P0104: MAF sensor range/impedance issues (if the MAF signal is involved or the IAT data is read alongside MAF data).
• P0171/P0174: System too lean (could result from sustained incorrect air-fuel readings triggered by IAT issues).
• P0300: Random/multiple misfires (possible if fuel trim is severely affected).
• P0420/P0430: Catalyst efficiency (if ECU fuel trims are abnormal for too long, catalyst performance can be affected indirectly).

REPAIR OPTIONS AND COSTS (2025 price ranges)

Note: Prices vary by region, dealer vs. independent shop, and Camry engine variant (2.5L 4-cyl vs. 3.5L V6). The ranges below are typical for replacement of a faulty IAT sensor and common related repairs.

• IAT sensor replacement (labor plus parts)

  • Parts: roughly $15–$60 (OEM vs. aftermarket)
  • Labor: about 0.3–1.0 hours
  • Total: approximately $60–$230

• MAF sensor cleaning or replacement (if IAT signal is tied to MAF behavior or if MAF contamination is suspected)

  • Cleaning (DIY or professional): often $0–$60
  • Replacement: $150–$400 (includes labor)

• Intake hose, clamps, and vacuum line repair/replacement

  • Parts: $15–$80
  • Labor: $40–$120
  • Total: roughly $60–$200

• Wiring harness repair or connector replacement (if wiring damage is found)

  • Parts: $10–$50 (connectors or small harness pieces)
  • Labor: $60–$180
  • Total: roughly $70–$230

• PCM/ECU related issues (rare; usually not the first fix)

  • Parts: $300–$700 (reprogramming or replacement)
  • Labor: $100–$300
  • Total: $400–$1000+

• Full intake manifold gaskets or related seals (if leaks contribute to incorrect readings)

  • Parts: $20–$100
  • Labor: $1–$3 hours
  • Total: roughly $200–$600

Important caveats

• If the problem is simply a faulty IAT sensor, many vehicles will see a quick and straightforward fix with the sensor replacement.
• If the code reappears after the IAT sensor replacement, broader diagnostics are warranted (e.g., MAF, vacuum leaks, wiring, PCM).
• These costs are approximate and can vary widely by region and shop rates.

DIY vs PROFESSIONAL

• Do-it-yourself (DIY)
  • Pros: Lower cost, learning opportunity, can be straightforward for simple IAT sensor replacement.
  • Cons: Requires basic tools (hand tools, multimeter), safety precautions, and confidence in unplugging/reconnecting electrical connectors without damaging wiring. Incorrect diagnosis can lead to repeated trips if the root cause isn’t the IAT sensor.
  • Typical DIY steps: Disconnect battery, locate IAT sensor, disconnect connector, remove sensor, install new sensor, reconnect, clear codes, and test drive.
• Professional repair
  • Pros: Comprehensive diagnosis, ensures correct fix, access to diagnostic equipment and OEM service information, warranty on repairs.
  • Cons: Higher cost than DIY.
  • When to seek professional help: If you see persistent misfire codes, intermittent readings, or the code returns after sensor replacement. If you are not comfortable testing electrical circuits or diagnosing potential PCM issues, a professional is recommended.

PREVENTION

• Regularly replace the air filter and inspect intake hoses for cracks or leaks.
• Use OEM or properly rated aftermarket sensor components; avoid low-quality parts that may read inaccurately.
• Check for and repair vacuum leaks and cracked intake hoses promptly.
• Keep the MAF and air intake area clean; if you’re using aftermarket cold-air intakes, ensure they don’t negatively affect sensor readings.
• Ensure proper electrical connections: avoid moisture, corrosion, or loose connectors in the engine bay.
• If your Camry is modified or heavily modified in intake/fueling, consider professional tuning to avoid sensor over- or under- readings.

Data limitations and transparency

• The provided data set for NHTSA in your prompt includes one owner complaint for P0442 (not P0113) and shows no recalls for the Camry in the dataset. Therefore, there are no Camry-specific P0113 complaint statistics in the supplied data to cite.
• The diagnostic guidance above relies on standard, widely applicable automotive knowledge for P0113 and typical Camry engine layouts; actual vehicle variant differences (2.5L vs. 3.5L; sensor placement; and electrical wiring) can affect exact location, testing procedure, and repair cost.
• If you want Camry-specific, year-by-year nuances (for example, exact IAT sensor location and connector pinout for 2018–2024 Camry models with different engines), we can tailor the steps to your exact engine code and VIN.

If you’d like, tell me your Camry’s engine variant (e.g., 2.5L 4-cylinder or 3.5L V6), whether you have a particular symptom (hard start, idle issue, fuel economy decline), and your region for price context. I can tailor the diagnostic steps, wiring checks, and price ranges to match your exact car and local labor rates.