Charge Air Cooler Temperature Sensor Circuit High Bank 2
The P00A3 code indicates that the Powertrain Control Module (PCM) has detected a voltage signal from the charge air cooler temperature sensor on Bank 2 that is higher than the expected range. This sensor monitors the temperature of the air entering the engine after the intercooler. A high voltage reading typically means the sensor is reporting an extremely low temperature or there is a circuit issue such as a short to voltage, open circuit, or a faulty sensor. This can affect engine performance and fuel economy.
01. Most Common Causes
- Faulty charge air cooler temperature sensor
- Short to voltage in sensor circuit
- Open circuit or poor connection in sensor wiring
- Corroded or damaged connector
- Faulty PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or performance
- Poor fuel economy
- Possible hesitation or rough idle
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 charge air cooler temperature sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and compare to manufacturer specifications; replace if out of range.
Step 4: Check for voltage at the sensor connector with the ignition on; should be around 5V reference. If not, check the circuit for shorts or opens.
Step 5: If all else is fine, consider a PCM issue; reprogram or replace as needed.
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 reduced performance and fuel economy may occur. Prolonged driving could lead to further engine issues, so it's best to diagnose and repair promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the sensor price and labor rates. If wiring repairs are needed, costs may be higher.