Damaged, corroded or loose connector at the bank 2 intake air temperature sensor; Open circuit in the signal or ground wire between the sensor and the control unit; Faulty intake air temperature sensor (internal open circuit); Signal wire shorted to a voltage supply or to another circuit; Chafed or heat-damaged wiring loom near the intake or turbocharger plumbing; Fault in the engine control unit sensor input or its reference supply.

P00AD

Intake Air Temperature Sensor 1 Circuit High 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
AD: FaultThe specific fault in that area

What it means

P00AD means the engine control unit has seen a signal voltage from intake air temperature sensor 1 on bank 2 that is higher than expected. A high voltage usually reads as an extremely cold air temperature, which is often an open circuit, a poor connection or a short to supply voltage. The control unit then cannot trust the air temperature reading used for fuelling and ignition calculations.

Symptoms

Engine warning light on
Hard or extended cranking when starting, especially from warm
Rough idle or hesitation under load
Poor fuel economy
Reduced power or the engine running rich
Other stored intake or air flow related codes

Possible causes

Damaged, corroded or loose connector at the bank 2 intake air temperature sensorlikely
Open circuit in the signal or ground wire between the sensor and the control unitlikely
Faulty intake air temperature sensor (internal open circuit)likely
Signal wire shorted to a voltage supply or to another circuitpossible
Chafed or heat-damaged wiring loom near the intake or turbocharger plumbingpossible
Fault in the engine control unit sensor input or its reference supplyrare

How to diagnose

Read all stored and pending codes and note the freeze frame data, including engine and intake air temperature at the time the code set.
Check live data: with the engine cold, the bank 2 intake air temperature should be close to coolant and ambient temperature. A reading stuck at the minimum, such as around -40°C, points to an open or high-voltage circuit.
Locate the bank 2 sensor, as its position depends on the model and engine, and inspect the connector for corrosion, bent pins, water ingress or a poor lock.
Inspect the wiring loom along its length for chafing, heat damage, previous repairs or rodent damage.
With the connector unplugged and ignition on, check the reference voltage and the ground at the harness side against the manufacturer's wiring data.
Measure the sensor resistance and compare it with the manufacturer's temperature-resistance specification, ideally at more than one temperature.
Check the signal wire for continuity to the control unit and for shorts to voltage or to other wires.
If the wiring and sensor test fine, check the control unit connector and refer to the manufacturer's procedure before suspecting the unit.

How to fix

Clean or repair the connector, or replace it if the terminals are damaged or corroded.
Repair or replace any open or damaged wiring in the signal or ground circuit.
Replace the bank 2 intake air temperature sensor if its resistance is out of specification.
Repair any short to voltage in the harness and secure the loom away from heat and sharp edges.
Replace or repair the control unit only after all wiring and sensor faults have been ruled out and it has been confirmed as faulty.

Can I keep driving?

Low severity

The car can usually be driven short term as the control unit will use a default air temperature value. Book it in soon, as fuel economy and driveability may suffer and other faults could be masked by the warning light staying on.

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