P0113 Code: Dodge Ram 1500 (2019-2024) - Causes, Symptoms & Fixes

CODE MEANING AND SEVERITY

• What P0113 means: P0113 is the OBD-II trouble code for the Intake Air Temperature Sensor 1 Circuit High Input. In practical terms, the PCM is seeing a higher-than-expected signal from the IAT sensor (or a fault in the IAT circuit) than would be produced by normal intake air temperature. On many Dodge/Chrysler systems, this can indicate the sensor is reporting an unusually hot air signal, or the circuit is being driven high due to a fault.

• Where it matters on a 2019–2024 Dodge Ram 1500: This engine-management input helps the PCM calculate appropriate fuel trim and ignition timing. A persistently high IAT input can cause the PCM to lean or rich trim adjustments, potentially reducing drivability and fuel economy.

• Severity (typical impact): Moderate. The MIL (check engine light) may be on, and you may notice reduced performance, slight roughness, or changes in fuel economy. In some cases the vehicle may run normally once the code is cleared, but the underlying sensor/circuit fault will trigger again if not repaired. Since this code pertains to intake air temperature sensing rather than a misfire, it’s less likely to cause immediate engine shutdown, but driveability and efficiency can be affected.

• Data note: Based on the provided NHTSA data for 2019–2024 Ram 1500, there are no owner complaints and no recalls listed for this issue in the dataset. No recalls found in NHTSA database. This means the diagnostic guidance below is based on general automotive knowledge and typical behavior for P0113 rather than a specific published Ram-1500 service bulletin in the dataset.

COMMON CAUSES ON DODGE RAM 1500

• Faulty IAT sensor itself: The sensor can become flaky, aged, or contaminated.
• IAT sensor wiring or connector problems: Damaged, frayed, shorted, or corroded wiring; poor connector latch; moisture ingress.
• Short to power or ground in the IAT circuit: A wire touching a hot line or a poor ground can push the signal high.
• PCM reference or input issue: Rare, but a faulty 5V reference, ground, or input channel in the PCM can cause an abnormal reading.
• Air intake side contamination or conditioning: Oil, dirt, or residue on or around the IAT sensor can bias readings; oil contamination from the intake tract can affect the sensor if it’s located in or near a dirty air path.
• Air leaks or routing issues near the sensor: Leaks upstream of the sensor can produce abnormal readings by allowing unmetered air to bypass the sensor.
• Related sensor interaction: In some setups, the IAT reading is influenced by/MAP/MAF interactions. A faulty MAF or dirty air path can complicate readings even if P0113 is set alone.
• Rare engine-management issues: A PCM fault or corrupted software could theoretically cause misinterpretation of sensor data, though this is uncommon.

SYMPTOMS

• Check Engine Light (MIL) on with P0113 stored or pending.
• Uneven or rough idle, especially at cold start or after a rapid throttle change.
• Less-than-anticipated acceleration or sluggish throttle response.
• Degraded fuel economy; slight performance drop.
• Live data shows IAT reading higher than expected for the actual ambient temperature.
• Inconsistent readings when re-scanning or road testing; if the fault is intermittent.
• Immediate or transient performance changes after clearing the code and restarting the vehicle.

DIAGNOSTIC STEPS

• Confirm the code and data

  • Use a scan tool to confirm P0113 is current (not history) and note freeze-frame data (engine load, coolant temp, ambient temp, etc.).
  • Verify the IAT value in live data and compare to the actual ambient air temperature (if you can observe both). The IAT should be in the same ballpark as ambient when the engine is off or at stable idle, and it should rise predictably with the engine running and intake air heating.

• Inspect the physical system

  • Locate the IAT sensor (usually mounted in the intake tract near the throttle body or between the air filter box and throttle body). Inspect for oil contamination, dirt build-up, or damage.
  • Inspect the electrical connector and wiring harness for cracks, corrosion, bent pins, or pin looseness. Check for signs of moisture or water intrusion.
  • Check for any obvious air leaks in the intake tract (cracked hoses, loose clamps) that could cause unmetered air to bypass the sensor.

• Electrical tests (use a DVOM or scan-tool derived data)

  • Sensor power and ground: Confirm the IAT sensor is receiving a stable 5V reference from the PCM and has a solid ground. A broken or loose ground or power line can cause erroneous readings.
  • Wiring continuity: With the sensor disconnected, check for continuity between the sensor wiring and the PCM input to confirm no open circuit or shorts.
  • IAT sensor resistance vs temperature (where available in service data): If possible, measure resistance of the IAT thermistor at known ambient temps and compare to spec from the Ram service data. If resistance is out of spec for the ambient temp, replace the sensor.
  • Sensor signal test: With the engine off and key on, monitor the IAT signal line on the scan tool. A healthy sensor should show a stable signal that changes smoothly with mild warmth or cold—if the signal is erratic, stuck high, or pegged near max, the sensor or wiring is suspect.

• Tests to differentiate from related codes

  • If P0112 (IAT circuit low input) or P0101/P0102/P0103 (MAF-related codes) also appear, perform concurrent checks on the MAF, intake tract, and related circuits as misreadings can be cascading or mask symptoms.
  • If all IAT checks pass but the code returns, consider a PCM fault or a need for software/firmware update from a dealer or qualified shop.

• After repair attempts

  • Clear codes and test drive under various conditions (idle, light throttle, moderate acceleration, and steady highway cruising). Monitor live data to ensure the IAT reading tracks ambient temperature when the engine is cold and increases gradually with intake air heating.
  • If the code reappears, re-test in a staged manner: sensor replacement first, then wiring harness/connector repairs, then PCM/software as a last resort.

RELATED CODES

• P0112: Intake Air Temperature Sensor Circuit Low Input. Often indicates the sensor signal is too low. May accompany P0113 or appear independently.
• P0101: Mass Air Flow Sensor Performance. If the MAF sensor is dirty or failing, it can influence readings in the intake air path and complicate diagnosis.
• P0102: Mass Air Flow Sensor Circuit LOW Input.
• P0103: Mass Air Flow Sensor Circuit High Input.
• If multiple IAT/MAF-related codes appear, inspect the entire air-path plumbing and sensor health.

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices vary by region and whether you’re buying OEM vs aftermarket parts. The Ram 1500 (2019–2024) typically uses common IAT sensors; costs below are approximate ranges.

• IAT sensor replacement

  • Parts: $15–$40
  • Labor: $40–$120
  • Estimated total: $60–$160
  • Notes: Most straightforward fix. If the sensor is easily accessible in the intake tract, this DIY replacement is common.

• Cleaning or replacement of the MAF sensor (if suspected related)

  • Parts: $20–$350 (MAF sensor replacement typically $100–$300)
  • Labor: $60–$150
  • Estimated total: $100–$500
  • Notes: If the MAF is dirty or failing, cleaning may help; replacing a faulty MAF can resolve cascading readings that affect IAT interpretation.

• Wiring harness or connector repair

  • Parts: $20–$100 (connector or harness segment)
  • Labor: $60–$200
  • Estimated total: $80–$300
  • Notes: If wiring is damaged or connectors corroded, the fix can be straightforward or require replacement of harness sections.

• PCM (Powertrain Control Module) related issues

  • Parts: $400–$900 (used/rebuilt PCM might vary; OEM can be higher)
  • Labor: $100–$200 (diagnostic time; some shops may charge more for flashing/programming)
  • Estimated total: $500–$1,100
  • Notes: Only consider PCM if sensor, wiring, and related components test OK and no faults found in other systems.

• Full diagnosis by a professional dealer or skilled shop

  • Diagnostic fee: Often $0–$150 (some shops waive with repair)
  • Additional charges for parts/labor as above
  • Total will depend on the scope of the repair and if software updates or programming are required.

• Important caveat

  • If no recalls/TSBs are listed in the provided dataset, there are no official NHTSA-reported recalls relevant to this code for the specified model years in the data. The repair estimates above reflect typical repair costs for this issue in 2025 and are not driven by a listed recall.

DIY VS PROFESSIONAL

• DIY candidates (good for a DIY novice or intermediate mechanic)

  • Pros: Low parts cost, hands-on learning, quick replacement of the sensor if easily accessible.
  • Cons: You’ll need basic electrical testing equipment (multimeter, scan tool), and you must ensure proper wiring and connector integrity. If you’re not confident with electrical diagnostics, consider a professional diagnosis.

• Professional diagnosis and repair

  • Pros: Access to OEM service data, precise resistance/voltage specs, sub-component testing (including wiring harness integrity), and potential PCM software updates.
  • Cons: Higher labor costs; scheduling at a shop.

• Simple DIY steps you can attempt (when safe)

  • Replace the IAT sensor if you can easily access it from the intake tract.
  • Inspect and reseat the sensor connector; clean any dirt or oil around the connector and sensor.
  • Check for obvious intake leaks and replace damaged hoses/clamps.
  • Clear the codes and perform a road test to verify if the code returns.
  • If the code persists, seek a professional diagnostic.

• Safety and tools

  • Disconnect the negative battery terminal before disconnecting any electrical connectors to avoid shorts.
  • Use appropriate hand tools; avoid over-tightening sensor fasteners.
  • Wear eye protection and ensure the engine is cool before touching components in the intake area.

PREVENTION

• Regularly inspect and replace the air filter to ensure clean intake air and proper sensor readings.
• Keep the intake tract clean and dry; avoid oil leaks or excessive oil in the air path that could contaminate sensors.
• Inspect wiring and connectors in the intake area for signs of wear, chafing, or moisture; fix any damaged sections promptly.
• Use OEM or high-quality replacement sensors to maintain expected sensor performance and PCM communication.
• Address intake leaks promptly; even small leaks can skew sensor data and complicate diagnostic codes.
• Periodically scan for DTCs and review live data to catch sensor drift or circuit faults early.
• If you perform any repairs, verify the fix with a road test and recheck for codes after multiple driving cycles.

Important data caveat and how it affects this guide:

• The provided dataset for 2019–2024 Ram 1500 shows no owner complaints and no recalls related to P0113 in the NHTSA database. This means the diagnostic and repair guidance above is based on general automotive knowledge and typical P0113 behavior rather than a dataset-backed, Ram-specific list of incidences or official service bulletins. If you have access to dealer service information or a more current database, it can offer Ram-specific wiring diagrams, sensor resistance specs, or TSBs that may refine this guide.