O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 1
P2241 indicates the PCM detected abnormally low positive current control in the oxygen sensor circuit for Bank 2, Sensor 1. This sensor monitors exhaust oxygen levels to help the engine maintain proper fuel mixture; when the control circuit malfunctions, the engine cannot accurately adjust fuel delivery and emissions control.
What You Might Notice
- Check Engine light illuminated
- Reduced fuel economy
- Diminished engine performance or hesitation
- Rough idle or surging
- Stored misfire or lean/rich codes
Most Common Causes
- 1
Defective oxygen sensor
Bank 2 Sensor 1 oxygen sensor has failed internally or developed resistance in the heater circuit, preventing proper positive current control signal.
- 2
Wiring or connector issues
Corroded, damaged, or loose wiring and connectors in the O2 sensor circuit, particularly the positive current control line, disrupts signal transmission.
- 3
PCM or control module fault
Engine control module may have failed to properly regulate positive current to the oxygen sensor heater circuit.
- 4
Fuel system issues
Fuel pressure problems or injector faults can cause the sensor to read consistently low oxygen, triggering the code.
How to Diagnose It
- 1
Check Defective oxygen sensor — Bank 2 Sensor 1 oxygen sensor has failed internally or developed resistance in the heater circuit, preventing proper positive current control signal.
- 2
Check Wiring or connector issues — Corroded, damaged, or loose wiring and connectors in the O2 sensor circuit, particularly the positive current control line, disrupts signal transmission.
- 3
Check PCM or control module fault — Engine control module may have failed to properly regulate positive current to the oxygen sensor heater circuit.
- 4
Check Fuel system issues — Fuel pressure problems or injector faults can cause the sensor to read consistently low oxygen, triggering the code.
How to Fix It
- 1
Replace oxygen sensor
Remove and replace the Bank 2 Sensor 1 oxygen sensor with a new OEM or quality aftermarket sensor, ensuring proper installation and connector seating.
- 2
Inspect and repair wiring
Check the positive current control wiring harness for corrosion, breaks, or loose connections; repair or replace damaged sections and clean connector terminals.
- 3
Test fuel system pressure
Verify fuel pressure is within specification using a fuel pressure gauge; inspect fuel injectors for proper operation to rule out fuel delivery as the cause.
- 4
Reprogram or replace PCM
If wiring and sensor are confirmed good, have the engine control module tested and reprogrammed or replaced by a qualified technician.
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