Intake Air Temperature Sensor 1 Circuit Bank 2
The P00AA code indicates a malfunction in the intake air temperature (IAT) sensor 1 circuit for bank 2. This sensor measures the temperature of air entering the engine and is critical for fuel mixture and ignition timing adjustments. The circuit includes the sensor, wiring, and the engine control module (ECM). A fault can cause incorrect air density calculations, leading to poor engine performance and increased emissions.
01. Most Common Causes
- Faulty IAT sensor
- Open or shorted wiring in the sensor circuit
- Corroded or loose connector
- ECM failure (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or hesitation
- Poor fuel economy
- Black smoke from exhaust (rich mixture)
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes.
Step 2: Visually inspect the IAT sensor connector and wiring for damage or corrosion.
Step 3: Measure sensor resistance with a multimeter; compare to manufacturer specs.
Step 4: Check voltage at the sensor connector with the ignition on; should be around 5V reference.
Step 5: If all else fails, test the ECM output or replace the sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
You can drive short distances, but it may cause poor performance and increased emissions. Prolonged driving could damage the catalytic converter.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on sensor location and labor rates.