O2 Sensor Reference Voltage Performance Bank 1 Sensor 1
The P2244 code indicates that the oxygen sensor (O2) in Bank 1, Sensor 1 (upstream of the catalytic converter) is experiencing a reference voltage performance issue. This means the sensor's internal reference voltage is out of the expected range, often due to a faulty sensor, wiring problems, or a malfunctioning engine control module (ECM). This can lead to incorrect air-fuel ratio readings, affecting engine performance and emissions.
1. Most Common Causes
- Faulty oxygen sensor (Bank 1 Sensor 1)
- Damaged or corroded wiring/connectors to the O2 sensor
- Short circuit in the sensor circuit
- Faulty engine control module (ECM)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor fuel economy
- Rough idle or hesitation during acceleration
- Failed emissions test
3. 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 O2 sensor wiring and connector for damage, corrosion, or loose connections.
Step 3: Measure the reference voltage at the sensor connector (should be around 0.45V with the engine running).
Step 4: If voltage is out of range, test the sensor itself or replace it if necessary.
Step 5: If the sensor and wiring are fine, check the ECM for faults or reprogramming needs.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
You can drive short distances, but it may cause poor fuel economy and increased emissions. Prolonged driving could damage the catalytic converter.
How much does it cost to fix?▼
Typically $150-$300 for parts and labor, depending on the sensor cost and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.