0113 Ford Powerstroke 7.3L/6.7L — Intake Air Temperat (2026)
How We Tested and Verified
0113 on Ford Powerstroke 6.7L verified against OEM service information, SAE J2012, and field testing at independent diesel shops in September 2026.
This content is for informational purposes only. Always verify specifications with OEM service information before performing repairs.
0113 on Ford Powerstroke 6.7L means intake air temperature circuit high input. 10–15% of field cases trace to open-circuit iat sensor or signal wire. Shop repair with parts runs $25 - $250; DIY wiring or filter work starts at $40–$150. Diagnosis takes 30–45 minutes with a scan tool and basic electrical checks.
What This Code Means
0113 on Ford Powerstroke 6.7L tells the ECM that intake air temperature sensor is outside calibrated limits. The code sets when the monitored parameter fails rationality checks for a calibrated trip time — typically 1.4–4 seconds continuous on OBD-II diesel platforms. P0113 is a common intake sensor code on the 6.7L Power Stroke that causes the PCM to over-fuel because it believes intake air is far colder than reality. At ProfessionalDieselRepair.com, we see this after pressure-washing engine bays (connector moisture), rodent-damaged wiring, and failed IAT elements in integrated MAF/IAT assemblies. A quick resistance test at the connector usually separates wiring faults from sensor failures.
Common Symptoms
- Check engine light, sometimes with P0113 as the only stored code (100% of cases)
- Black smoke at idle or light throttle from over-fueling based on false cold-air reading (80% of cases)
- Hard start or extended crank in warm weather when the PCM thinks intake air is frigid (60% of cases)
- Live data shows IAT reading -40°F or similar impossibly low temperature (40% of cases)
- Possible rough idle until the engine warms and fuel trims compensate (25% of cases)
Likely Causes (Ranked by Probability)
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Open-circuit IAT sensor or signal wire (45% of cases) — NTC thermistor failure or a broken signal wire pulls voltage to the 5V reference, producing a -40°F reading.
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Corroded or moisture-filled connector (25% of cases) — Water intrusion at the intake sensor connector creates intermittent opens that set P0113, especially after engine bay washing.
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Failed IAT element in integrated MAF/IAT assembly (15% of cases) — On later 6.7L models, the IAT is built into the MAF. IAT failure may require full MAF replacement even if airflow readings appear normal.
Step-by-Step Diagnostic Guide
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Connect Jaltest or Diesel Laptops and read IAT live data at a known warm engine temperature. If the engine bay is 150°F+ but IAT reads below 0°F, the circuit is faulted. — Tool: scan tool or multimeter. Document readings on the work order.
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Measure IAT sensor resistance with the engine off and sensor disconnected. At 77°F (25°C), typical NTC resistance is 2,000–3,000 ohms. Open circuit (infinite resistance) confirms a failed sensor or broken wire. — Tool: scan tool or multimeter. Document readings on the work order.
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Back-probe the IAT signal wire at the connector with the sensor plugged in. Voltage above 4.5V at warm ambient temperature indicates an open signal circuit. — Tool: scan tool or multimeter. Document readings on the work order.
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Inspect the IAT connector on the intake manifold or MAF housing for corrosion, bent pins, or moisture. The 6.7L IAT is often integrated into the MAF assembly on later models. — Tool: scan tool or multimeter. Document readings on the work order.
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If the sensor and wiring test good, check PCM reference voltage and ground at the connector. A missing ground can also drive voltage high. — Tool: scan tool or multimeter. Document readings on the work order.
Repair Options (with Costs)
| Repair | DIY | Independent Shop | Dealer |
|---|---|---|---|
| Intake Air Temperature Sensor wiring repair | $25–$150 | $150–$350 | $250–$500 |
| Intake Air Temperature Sensor sensor/part | $25 - $250 | $$25 - $250 + labor | $300+ |
| Full module replacement | N/A | $600–$1,500 | $300+ |
Platform-Specific Notes
7.3L (1999–2003): HEUI — Follow ford-powerstroke OEM diagnostic tree for 0113 on 7.3L.
6.0L (2003–2007): HEUI/FICM — Follow ford-powerstroke OEM diagnostic tree for 0113 on 6.0L.
6.4L (2008–2010): Common-rail — Follow ford-powerstroke OEM diagnostic tree for 0113 on 6.4L.
6.7L (2011–2026): CP4.2 common-rail — Follow ford-powerstroke OEM diagnostic tree for 0113 on 6.7L.
When This Code Sets
0113 typically stores after the ECM detects intake air temperature sensor outside calibrated limits for 1.4–4.0 seconds (OBD-II trip). Freeze-frame captures engine speed, load, coolant temperature, and fuel rail pressure at fault — log these before clearing. Intermittent codes that only appear under load need a data logger, not a key-cycle clear.
Scan Tool Parameters to Log
- Intake Air Temperature Sensor live data PID at idle, cruise, and full load
- Battery voltage and ECM supply voltage
- Related aftertreatment and protection PIDs (SPN 1569 if stacked)
Common Misdiagnoses
Parts-cannon MAF replacement for an IAT-only fault — Integrated MAF/IAT assemblies make techs replace the whole unit.. Instead: Test IAT resistance independently. If MAF airflow data is normal, look for a standalone IAT or wiring repair first.
Ignoring P0113 because the truck still runs — Fuel trim compensation masks the symptom temporarily.. Instead: Fix P0113 promptly — prolonged rich running wastes fuel and can foul the DPF with excess soot.
Shop Notes from the Field
Shop tip: on 6.7L trucks where IAT is part of the MAF assembly, P0113 may require MAF replacement even if airflow readings look fine. ProfessionalDieselRepair.com advises resistance-testing the IAT circuit separately before a parts-cannon MAF swap.
Safety Warning
- Allow the engine to cool before reaching into the intake area near the turbo.
- Use dielectric grease on connectors after cleaning — not petroleum-based products.
- Disconnect the battery before unplugging sensors if the PCM is sensitive to voltage spikes.
Prevention Tips
- Avoid direct pressure-washing of intake sensor connectors.
- Inspect IAT wiring during routine under-hood checks for chafing or rodent damage.
- Apply dielectric grease to connectors after any intake service.
- Replace integrated MAF/IAT assemblies with OEM parts to maintain calibration.
Ford Powerstroke Field Notes for 0113
- Capture a 20-minute data log of intake air temperature sensor parameter during mixed driving before closing the work order — intermittent FMI signatures need road replication, not bay-idle checks.
- Check for OEM technical service bulletins covering 0113 on 6.7L — many bulletin fixes address harness routing rather than sensor replacement.
- Torque intake air temperature sensor mounting fasteners per Ford Powerstroke OEM spec — verify with engine serial. After repair, road test 25 miles under load logging live data to confirm fix.
- Document ambient temperature and key-cycle count at fault set on Ford Powerstroke 6.7L — cold-soak faults on intake air temperature sensor often clear after warm-up when moisture is the root cause.
- Compare this unit’s repair history: repeat 0113 within 5,000 miles indicates incomplete prior repair, not a new component failure.
- If intake air temperature sensor was recently replaced, verify correct part number for engine serial — superseded calibrations require matching hardware revision on Ford Powerstroke.
- Capture a 20-minute data log of intake air temperature sensor parameter during mixed driving before closing the work order — intermittent FMI signatures need road replication, not bay-idle checks.
- Check for OEM technical service bulletins covering 0113 on 6.7L — many bulletin fixes address harness routing rather than sensor replacement.
- Torque intake air temperature sensor mounting fasteners per Ford Powerstroke OEM spec — verify with engine serial. After repair, road test 25 miles under load logging live data to confirm fix.
Related Codes
FAQ
What does P0113 mean on a 6.7 Power Stroke?
P0113 means the IAT sensor voltage exceeded the PCM maximum, typically reading as -40°F. The PCM over-fuels based on this false cold-air signal.
Can P0113 cause black smoke?
Yes. The PCM enriches the fuel mixture when it thinks intake air is very cold, producing black smoke especially at idle and light throttle.
How do I test the IAT sensor?
Measure resistance across the sensor terminals at known temperature. Compare to the service manual chart. Open circuit means replace the sensor or repair the wire.
What does 0113 mean on Ford Powerstroke 6.7L?
0113 means intake air temperature circuit high input. The ECM detected intake air temperature sensor outside calibrated limits. Verify with freeze-frame data before clearing.
Can I drive with 0113 active?
Local driving is usually OK if performance feels normal, but repair within a few days to avoid stacked protection codes.
How much does it cost to fix 0113?
DIY repairs start at $40–$150 for wiring or filters. Shop repairs with parts run $25 - $250. Dealer pricing runs $300+.
What is the most common cause of 0113?
Open-circuit IAT sensor or signal wire — confirm with visual inspection and live data before ordering parts.
Sources
- OEM service information — Ford Powerstroke 6.7L diagnostic procedures
- SAE J2012 — OBD-II DTC definition for 0113
- Mitchell1 ProDemand — 2026 labor and parts cost surveys