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DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P0095

P0095Intake Air Temperature Sensor 2 Circuit

P0095 indicates that the powertrain control module has detected an abnormal signal from the second intake air temperature sensor, which is typically located after the turbocharger or in the intake manifold to monitor charge air temperature. The computer compares this reading with other temperature sensors and expects a plausible voltage within a specific range; when the signal falls outside that range or is inconsistent, the code is stored.

SystemPowertrain
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

  • Illumination of the check engine light, often with no other noticeable symptoms
  • Reduced engine performance or power, especially under load or during acceleration
  • Decreased fuel economy due to incorrect air density calculations
  • Rough idle or hesitation when the engine is cold or during sudden throttle changes
  • In rare cases, the engine may enter limp mode or exhibit poor turbocharger response

Common causes, most likely first

  1. Faulty intake air temperature sensor 2 (sensor itself has failed or drifted)
  2. Damaged or corroded wiring harness or connector at the sensor
  3. Open or short circuit in the sensor signal or ground circuit
  4. Intake air leaks or restrictions affecting the sensor's reading
  5. Contaminated sensor element from oil or debris (e.g., from a faulty turbo or PCV system)
  6. Poor electrical connection at the powertrain control module (PCM) connector
  7. Extreme environmental conditions causing the sensor to read outside expected range (rare)

How to diagnose and fix it

  1. Use an OBD-II scanner to verify the code and check live data for intake air temperature sensor 2; compare its reading with ambient and sensor 1 temperatures after a cold soak.
  2. Visually inspect the sensor, its connector, and the wiring harness for damage, corrosion, or loose pins; repair or replace as needed.
  3. Perform a voltage drop test on the sensor signal and ground circuits to check for excessive resistance or opens.
  4. Check the sensor's resistance with a multimeter and compare to the manufacturer's specification; replace the sensor if out of range.
  5. Inspect the intake system for leaks or blockages that could affect the sensor's exposure to actual air temperature.
  6. Clear the code and test-drive the vehicle to see if the code returns; if it does, further diagnose the PCM or wiring.
  7. If all else fails, consult factory service information for specific pinpoint tests and consider PCM reprogramming or replacement.

Common Misdiagnosis Traps for P0095

  • Many technicians replace the intake air temperature sensor 2 without checking the wiring, but a chafed harness near the turbo or manifold often causes intermittent signals that mimic sensor failure.
  • The code can be set by a dirty or oil-fouled sensor element from a leaking turbocharger seal or PCV system, so cleaning the sensor may resolve the issue without replacement.
  • On some vehicles, intake air temperature sensor 2 is integrated into the mass airflow sensor or manifold absolute pressure sensor, so the entire assembly may need replacement.
  • A faulty thermostat or cooling system issue can cause intake air temperature readings to be implausible, leading to this code even when the sensor circuit is intact.
  • Always check for technical service bulletins (TSBs) for the specific vehicle, as some manufacturers have known issues with connector seals or PCM software.

Can I keep driving with P0095?

The vehicle is generally safe to drive with P0095 because the fault typically causes only minor performance or fuel economy changes. Avoid heavy acceleration or towing until the issue is diagnosed, and address it promptly to prevent potential long-term effects on engine efficiency.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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