Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 2
The P00AB code indicates that the Engine Control Module (ECM) has detected an issue with the Intake Air Temperature (IAT) Sensor 1 circuit on Bank 2. This sensor measures the temperature of the incoming air to help the ECM adjust fuel delivery and ignition timing. The 'Range/Performance' aspect means the sensor's signal is outside the expected range or the sensor is not responding correctly. This can lead to poor engine performance, increased emissions, and reduced fuel economy.
01. Most Common Causes
- Faulty Intake Air Temperature Sensor 1 on Bank 2
- Wiring or connector issues in the sensor circuit (open, short, corrosion)
- Air intake system leak causing incorrect temperature readings
- ECM software or hardware malfunction (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance (hesitation, rough idle, stalling)
- Decreased fuel economy
- Black smoke from exhaust (rich mixture) or hard starting
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the IAT sensor and its connector for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance with a multimeter and compare to manufacturer specifications at known temperatures.
Step 4: Check the wiring between the sensor and ECM for opens, shorts, or high resistance.
Step 5: If all else is fine, replace the IAT sensor on Bank 2.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but prolonged driving may cause poor performance, reduced fuel economy, and potential damage to other components like the catalytic converter due to incorrect air-fuel mixture.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, including parts (sensor $20-$60) and labor (0.5-1 hour at $80-$120 per hour).