Faulty IAT sensor 2 (internal open or short circuit, or drifted readings); Damaged, chafed or corroded wiring to the sensor (open circuit, short to earth or short to supply); Loose, corroded or contaminated connector terminals at the sensor or control unit; Sensor contaminated with oil or dirt, or damaged by heat; Wrong or poorly fitted sensor after previous repairs; Fault inside the engine control unit.

P0095

Intake Air Temperature Sensor 2 Circuit Bank 1.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
95: FaultThe specific fault in that area

What it means

P0095 is the generic code for a fault in the Intake Air Temperature (IAT) Sensor 2 circuit on Bank 1. The engine control unit has detected a signal from this second sensor that is outside the expected range or does not make sense, usually because of a wiring, connector or sensor fault. Which sensor is 'sensor 2' and where it sits varies by model and engine, for example before or after a turbocharger or intercooler.

Symptoms

Malfunction indicator lamp on
Poor or hesitant acceleration
Rough running or uneven idle
Hard starting, especially when cold
Reduced fuel economy
Lack of boost or the engine in limp mode on turbocharged engines

Possible causes

Faulty IAT sensor 2 (internal open or short circuit, or drifted readings)likely
Damaged, chafed or corroded wiring to the sensor (open circuit, short to earth or short to supply)likely
Loose, corroded or contaminated connector terminals at the sensor or control unitlikely
Sensor contaminated with oil or dirt, or damaged by heatpossible
Wrong or poorly fitted sensor after previous repairspossible
Fault inside the engine control unitrare

How to diagnose

Read all stored and pending codes and the freeze frame data, and note any other IAT, boost or coolant temperature codes.
Check the sensor 2 location for your model and engine, then inspect the sensor, connector and wiring for damage, chafing, oil contamination or corrosion.
With the engine cold and ignition on, compare the IAT sensor 2 reading with the other IAT sensor and the coolant temperature; they should be close.
Look at live data as the engine warms up and wiggle the wiring and connector to see whether the reading jumps or drops out.
Unplug the sensor and check that the reading goes to the control unit's expected fault value, then check the reference voltage and earth at the connector against the manufacturer's data.
Measure the sensor resistance and compare it with the specification for the temperature, if the manufacturer publishes it.
Test the wiring between the sensor and control unit for continuity and for shorts to earth or supply.
Check for related causes such as a split intake pipe or intercooler hose that could affect the readings.

How to fix

Replace the IAT sensor 2 if its resistance or readings are out of specification.
Repair or replace damaged wiring between the sensor and the control unit.
Clean, repair or replace corroded or loose connector terminals and make sure the connector locks fully.
Fit the correct sensor for the vehicle and make sure it is seated and sealed properly.
Clear the oil source or fix any contamination of the intake before refitting the sensor.
If all wiring and sensor tests pass, have the control unit checked following the manufacturer's procedure.

Can I keep driving?

Low severity

The car can usually be driven short-term, as the control unit will use a default value, but performance and economy may suffer. Book it in soon, and avoid heavy loads if the engine goes into limp mode.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.