P00AE — Intake Air Temperature Sensor 1 Circuit Intermittent Bank 2

P00AE indicates an intake-air-temperature intermittent/erratic signal at sensor 1, bank 2. This identifies a monitored signal or plausibility condition, not a confirmed defective sensor or a confirmed physical air temperature. Identify the actual sensor and circuit from the vehicle-specific service information before replacing parts.

Affected system: Powertrain

Symptoms

• An engine warning lamp or stored DTC may appear, sometimes with no obvious driving symptoms.
• Starting or drivability may worsen if the control unit substitutes an estimated intake-air temperature.
• Reduced power or increased fuel consumption is possible, but neither uniquely identifies this sensor.

Possible causes

• A loose/corroded terminal or damaged harness can produce an intermittent signal.
• Corrosion, damaged insulation or a poor terminal connection may distort the signal.
• The temperature-sensing element may be damaged or contaminated; location and integration vary by engine.

What to check

• Read the stored/pending DTC and freeze frame; confirm the correct bank, sensor number and available IAT channels for this engine.
• With the engine cold after sufficient rest, compare IAT live data against ambient temperature and other installed temperature channels, allowing for sensor placement.
• Review live-data time traces and freeze-frame context; inspect connectors and harness for vibration-related intermittency while parked safely.
• Inspect the sensor, connector and harness for damage, loose terminals, water ingress and contamination. Do not probe an unknown connector without a diagram.
• Where specified, compare sensor resistance/signal response to the OEM temperature curve; a MAP/IAT combined unit must be identified before parts replacement.
• Repair only the verified fault, then clear the code and retest under the monitor conditions specified for the vehicle.

Also written as: P00AE-00, P00AE00, PO0AE (some scan tools add the fault-type byte, e.g. -00).