Intake Air Temperature Sensor 1 Circuit High Bank 2
The P00AD code indicates that the Engine Control Module (ECM) has detected a voltage signal from the Intake Air Temperature (IAT) sensor 1 on Bank 2 that is higher than the expected range. This typically means the sensor is reading an extremely cold intake air temperature or there is an open circuit, high resistance, or a short to voltage in the sensor wiring. Bank 2 refers to the side of the engine opposite cylinder #1. This can cause incorrect air-fuel mixture, leading to poor performance and increased emissions.
01. Most Common Causes
- Faulty Intake Air Temperature (IAT) sensor 1 on Bank 2
- Open or shorted wiring in the IAT sensor circuit
- Corroded or loose electrical connector at the IAT sensor
- ECM software or hardware issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance, hesitation, or rough idle
- Increased fuel consumption
- Black smoke from exhaust (rich mixture) or hard starting (cold start issues)
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for other related codes.
Step 2: Visually inspect the IAT sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Measure the IAT sensor resistance with a multimeter; compare to manufacturer specifications (typically 2-5 kΩ at room temperature).
Step 4: Check for voltage at the sensor connector (should be around 5V reference signal). If voltage is high, check for short to power.
Step 5: If sensor and wiring are okay, test the ECM by monitoring the signal with a scan tool; replace sensor if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances with this code, as it can cause poor fuel economy, drivability issues, and potential damage to the catalytic converter due to incorrect air-fuel mixture.
How much does it cost to fix?▼
The cost to fix P00AD typically ranges from $50 to $150, including parts (IAT sensor) and labor. Diagnostic fees may add $50-$100.