The OBD2 code P0096 is a diagnostic trouble code that signifies an “Intake Air Temperature (IAT) Sensor 2 Circuit Malfunction” in your vehicle. This code indicates that there’s an issue with the electrical circuit of the second IAT sensor, which can affect the engine’s ability to adjust to changes in air temperature.
While the driver might not notice immediate symptoms, addressing this issue early can prevent potential performance problems.
P0096 quick overview
| Meaning | P0096: Intake Air Temperature (IAT) Sensor 2 Circuit Malfunction |
| Is it serious? | It can lead to engine performance issues if not addressed, but immediate symptoms might not be noticeable. |
| Possible causes | – Faulty IAT sensor – Open or short in the IAT sensor circuit – Poor electrical connection in the IAT sensor circuit |
| How to diagnose? | Verify IAT voltage with Key On Engine Off (KOEO). Check for open or short circuits in the signal and ground circuits. Artificially raise and lower IAT sensor temperature to observe resistance changes. Perform a “wiggle” test on the wiring harness while monitoring signal voltage. Replace the IAT sensor if necessary. |
P0096 Meaning
When your car reports the P0096 code, it’s essentially alerting you to a problem with a sensor that measures the air’s temperature entering your engine. This sensor helps your car’s computer make adjustments to keep everything running smoothly, like adjusting the fuel mix based on how cold or hot the air is.
If this sensor isn’t working right, your engine might not run as efficiently, but you might not notice anything off from the driver’s seat. Getting it checked out means your car can adjust accurately to different temperatures, keeping your ride smooth and efficient.
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How to fix P0096 – learn from mechanics
I looked into P0096 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Honda
Vehicle Information 2010 Honda Accord 2.4L
Issue + Repair History
- Intermittent check engine light with code P0096.
- No noticeable symptoms to the driver.
- Previous repairs: none mentioned.
Other OBD2 Codes + Test Results
- OBD2 Code: P0096 – IAT Sensor 2 Circuit Malfunction.
- No other codes mentioned.
- Live data shows inconsistent IAT sensor readings.
Mechanic Suggestions
- Verify IAT voltage with KOEO.
- Check for open or short circuits in the signal and ground circuits.
- Artificially raise and lower IAT sensor temperature to observe resistance changes.
- Perform a “wiggle” test on the wiring harness while monitoring signal voltage.
- Replace the IAT sensor if necessary.
Final Fix After performing diagnostics and observing artificial temperature changes on the IAT sensor, it was determined that the sensor was faulty. Replacing the IAT sensor resolved the issue, and the vehicle no longer displayed the P0096 trouble code.
Case #2: Toyota
Vehicle Information 2016 Toyota Corolla 1.8L
Issue + Repair History
- MIL illuminated with code P0096.
- No drivability problems noted by the driver.
- Previous repairs: none mentioned.
Other OBD2 Codes + Test Results
- OBD2 Code: P0096 – IAT Sensor 2 Circuit Malfunction.
- No additional codes reported.
- Live data indicates erratic IAT sensor readings.
Mechanic Suggestions
- Verify IAT voltage with KOEO.
- Inspect signal and ground circuits for open or short circuits.
- Conduct artificial temperature changes on the IAT sensor to test resistance.
- Perform a “wiggle” test on the wiring harness while monitoring signal voltage.
- Replace the IAT sensor if indicated by diagnostics.
Final Fix Upon diagnosing the issue and conducting artificial temperature changes on the IAT sensor, it was evident that the sensor was malfunctioning. Replacing the IAT sensor resolved the issue, and the vehicle no longer exhibited the P0096 trouble code.
Case #3: Ford P0096
Vehicle Information 2013 Ford Fusion 2.0L
Issue + Repair History
- MIL illuminated with code P0096.
- No apparent symptoms reported by the driver.
- Previous repairs: none mentioned.
Other OBD2 Codes + Test Results
- OBD2 Code: P0096 – IAT Sensor 2 Circuit Malfunction.
- No other codes indicated.
- Live data shows inconsistent IAT sensor readings.
Mechanic Suggestions
- Verify IAT voltage with KOEO.
- Inspect signal and ground circuits for open or short circuits.
- Conduct artificial temperature changes on the IAT sensor to test resistance.
- Perform a “wiggle” test on the wiring harness while monitoring signal voltage.
- Replace the IAT sensor if indicated by diagnostics.
Final Fix After diagnosing the issue and conducting tests on the IAT sensor, it was evident that the sensor was faulty. Replacing the IAT sensor resolved the issue, and the vehicle no longer displayed the P0096 trouble code.
How to diagnose P0096
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Brief Explanation |
|---|---|
| Verify IAT voltage with KOEO | Ensures the IAT sensor is receiving the correct voltage, indicating a healthy electrical connection. |
| Check for open or short circuits | Identifies any electrical issues in the circuit that could lead to incorrect sensor readings. |
| Artificially raise and lower IAT sensor temperature | Tests the sensor’s responsiveness to temperature changes, indicating its functionality. |
| Perform a “wiggle” test on the wiring harness | Helps in identifying intermittent connection issues that may not be obvious. |
| Replace the IAT sensor | The final step if diagnostics confirm the sensor is faulty, resolving the issue. |
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko