18669 - Oxygen (Lambda) Sensor B1 S1 ---- P2237 - 001 - Pump Current Open Circuit - MIL ON | Ross-Tech Forums
1 year old oxygen sensor, codes p2237/p2238, coolant contamination? It's a 2008 Toyota matrix. We had the head gasket done about 7 or so years ago at the dealership. : r/MechanicAdvice