O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 1
The P2241 code indicates that the powertrain control module (PCM) has detected a low voltage or current condition in the positive current control circuit of the oxygen sensor located on Bank 2, Sensor 1 (upstream of the catalytic converter). This circuit is responsible for regulating the sensor's heater and pump current for proper air-fuel ratio monitoring. A low signal suggests a short to ground, open circuit, or faulty sensor, leading to inaccurate oxygen readings and potential drivability issues.
01. Most Common Causes
- Faulty oxygen sensor (Bank 2 Sensor 1)
- Open or shorted wiring in the sensor circuit
- Corroded or damaged connector
- Blown fuse or relay for the oxygen sensor heater circuit
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor fuel economy
- Rough idle or hesitation
- Failed emissions test
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm P2241 and check for other codes.
Step 2: Visually inspect the wiring and connector for Bank 2 Sensor 1 for damage, corrosion, or loose connections.
Step 3: Test the sensor's heater circuit voltage and ground with a multimeter; compare to manufacturer specs.
Step 4: If wiring is intact, replace the oxygen sensor (Bank 2 Sensor 1).
Step 5: Clear codes and test drive to verify repair.
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 fuel economy and increased emissions. Prolonged driving could damage the catalytic converter.
How much does it cost to fix?▼
Typically $50-$150 for a DIY sensor replacement; labor adds $100-$200 if done by a shop.