Indicates a high voltage condition in the positive control circuit of the oxygen sensor on bank 2, sensor 1, usually due to a sensor or circuit fault.
The sensor's internal heater or signal circuit can short, causing the control module to detect excessive current.
Corroded, broken, or loose wiring harness and connector at the sensor can raise resistance and trigger a high‑current reading.
Leaks upstream of the sensor can introduce abnormal exhaust gases that affect sensor operation and circuit behavior.
A rare internal failure in the PCM's sensor driver circuit can produce an incorrect high reading.
Improper torque or damaged sensor housing may cause intermittent electrical faults.
Yes, the sensor is accessible and can be swapped with basic hand tools, but proper torque and connector seating are required.
No, PCM failures are uncommon; most P2242 cases are resolved by replacing the sensor or repairing wiring.
Clearing the code with a scan tool is recommended after repairs to verify that the problem does not return.
Yes, a faulty O2 sensor can cause higher emissions and may cause the vehicle to fail an emissions inspection.