O2 Sensor Positive Current Control Circuit Low (Bank 2, Sensor 1)
What does P2241 mean?
The P2241 code means the vehicle's onboard diagnostic system has detected: O2 Sensor Positive Current Control Circuit Low (Bank 2, Sensor 1). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Engine running lean
- Rough idle
- Hesitation on acceleration
- Failed emissions test
Probable Causes (Ranked by Likelihood)
- Failed wideband O2 sensor with low pump cell current Very High
- Wiring short to ground in the positive current control circuit High
- Corroded sensor connector reducing current flow Moderate
- Exhaust leak affecting sensor readings on Bank 2 Moderate
- ECM control circuit outputting low current Low
Step-by-Step Diagnostic Procedure
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Read Bank 2 Sensor 1 air-fuel ratio data with a scan tool
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Check for wiring shorts to ground in the pump cell circuit
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Inspect the sensor connector for corrosion or poor contact
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Check for exhaust leaks near the Bank 2 sensor location
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Replace the wideband O2 sensor if the pump cell has failed
Frequently Asked Questions
What does low current in the pump cell mean?
The pump cell in a wideband sensor uses controlled current to measure air-fuel ratio. Low current means the sensor or its circuit cannot maintain the proper measurement, leading to inaccurate readings.
Can an exhaust leak cause P2241?
Yes, an exhaust leak near the Bank 2 sensor allows ambient air into the exhaust stream, which affects the sensor reading and can cause the current control to go out of range.
Should I replace the sensor or repair wiring first?
Always check wiring and connections first. If the wiring is intact and the connector is clean, the sensor itself is the most likely cause and should be replaced.