P2238 — code

The engine control module (ECM) detects the O2 sensor for bank 1 with OBD-II generic code P2238. For the heating control circuit of the O2 sensor, sensor number one has a short circuit. Indicating a shorted O2 sensor heater circuit, which results in low circuit voltage control. As a result, the ECM will place the engine into failure mode or open loop fuel control, preventing the fuel feedback control from functioning. Additionally, this will result in the car failing the emissions test.