Intake Air Temperature Sensor 2 Circuit Bank 1
P0095 indicates the PCM detected an out-of-range voltage signal from the Intake Air Temperature (IAT) Sensor #2. This thermistor-type sensor measures incoming air temperature by changing resistance; if the signal voltage falls outside normal operating parameters, the code sets. While the engine may still run, this can cause poor fuel mixture calculation and drivability issues.
What You Might Notice
- Check Engine Light (MIL) illumination
- Poor fuel economy
- Rough idle or hesitation during acceleration
- Hard cold starts
- Difficulty maintaining steady engine speed
Most Common Causes
- 1
Faulty IAT Sensor #2
The sensor itself has failed or shifted out of the proper airflow path, causing incorrect voltage readings to the PCM.
- 2
Open or shorted signal circuit
The wiring or connector between IAT Sensor #2 and the PCM is open, shorted to ground, or corroded, preventing proper voltage signal transmission.
- 3
Poor electrical connection at IAT sensor
Connector terminals are backed out, loose, corroded, or improperly seated, causing intermittent or weak signal voltage.
- 4
Open ground circuit to sensor
The ground wire or connection from the IAT Sensor #2 to the engine block is loose, broken, or corroded, preventing proper ground reference.
How to Diagnose It
- 1
Check Faulty IAT Sensor #2 — The sensor itself has failed or shifted out of the proper airflow path, causing incorrect voltage readings to the PCM.
- 2
Check Open or shorted signal circuit — The wiring or connector between IAT Sensor #2 and the PCM is open, shorted to ground, or corroded, preventing proper voltage signal transmission.
- 3
Check Poor electrical connection at IAT sensor — Connector terminals are backed out, loose, corroded, or improperly seated, causing intermittent or weak signal voltage.
- 4
Check Open ground circuit to sensor — The ground wire or connection from the IAT Sensor #2 to the engine block is loose, broken, or corroded, preventing proper ground reference.
How to Fix It
- 1
Test and replace IAT Sensor #2
Use a multimeter to check sensor resistance at different temperatures; if readings are out of specification, replace the sensor. Verify it is positioned correctly in the intake airflow.
- 2
Inspect and repair wiring harness
Check the signal wire and ground wire between IAT Sensor #2 and the PCM for breaks, corrosion, or damage. Repair any damaged sections or replace the entire harness if necessary.
- 3
Clean or replace sensor connector
Remove the connector from IAT Sensor #2 and clean the terminals with electrical contact cleaner. If terminals are backed out or damaged, reseat them or replace the connector.
- 4
Verify and repair ground connection
Trace the ground wire from the sensor to the engine block, cleaning corrosion and ensuring tight connection. If wire is damaged, splice in new wire or replace the entire ground circuit.
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