Damaged, chafed or corroded wiring to the bank 2 intake air temperature sensor 2 (open circuit, short to earth or short to supply); Poor connection at the sensor plug, such as corroded, loose or pushed-out terminals; Faulty intake air temperature sensor 2 on bank 2; Heat or oil damage to the sensor or harness near the charge air pipework or manifold; Fault in the shared sensor reference or earth circuit; Fault inside the engine control unit.

P00A5

Intake Air Temperature Sensor 2 Circuit Bank 2.

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
A5: FaultThe specific fault in that area

What it means

P00A5 is the generic code for a fault in the intake air temperature sensor 2 circuit on bank 2. The engine control unit has seen a signal from this sensor that is outside the expected range, or that does not make sense against other temperature data. Where sensor 2 is fitted, and what it is used for, depends on the engine and model, for example after the turbocharger or charge cooler.

Symptoms

Engine management warning light on
Poor or hesitant acceleration
Reduced power or limp mode on some engines
Rough idle or uneven running
Poor fuel economy
Hard starting in some conditions

Possible causes

Damaged, chafed or corroded wiring to the bank 2 intake air temperature sensor 2 (open circuit, short to earth or short to supply)likely
Poor connection at the sensor plug, such as corroded, loose or pushed-out terminalslikely
Faulty intake air temperature sensor 2 on bank 2likely
Heat or oil damage to the sensor or harness near the charge air pipework or manifoldpossible
Fault in the shared sensor reference or earth circuitpossible
Fault inside the engine control unitrare

How to diagnose

Read all stored and pending codes and note the freeze frame data. Look for other temperature sensor or boost-related codes that could point to a shared cause.
Find the bank 2 intake air temperature sensor 2 location for this engine, using model-specific information, and check the sensor and plug for damage, oil, moisture and security.
Inspect the harness along its full length for chafing, heat damage, rodent damage and previous repairs.
With the engine cold, compare the live reading from this sensor with the other intake and coolant temperature readings. They should be close to each other. A reading stuck at an extreme suggests an open or shorted circuit.
Unplug the sensor and check the sensor resistance against the manufacturer's temperature table. Check that the resistance changes smoothly as the sensor is warmed gently.
Check the reference voltage and earth at the harness plug, then test the signal wire for continuity and for shorts to earth or supply.
Wiggle the harness and plug with the engine running, watching live data for dropouts that point to an intermittent fault.
If the wiring and sensor test fine, check for software updates and confirm the fault with the manufacturer's procedure before suspecting the control unit.

How to fix

Repair or replace damaged wiring, and secure the harness away from heat and sharp edges.
Clean or replace corroded connector terminals, or replace the connector.
Replace the bank 2 intake air temperature sensor 2 if it is out of specification or reads incorrectly.
Repair any fault found in the shared reference or earth circuit.
Clear the code after the repair and road test to confirm that it does not return.

Can I keep driving?

Low severity

The car can usually be driven short-term, and you should book it in soon. If it goes into reduced power or runs poorly, limit driving and have it checked sooner.

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