DTC P0037, DTC P0038, DTC P0057 & DTC P0058: Notes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Code Definition
- DTC P0037: Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2)
- DTC P0038: Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2)
- DTC P0057: Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2)
- DTC P0058: Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2)
CAUTION:
If Engine Control Module (ECM) replacement is instructed in following test, always ensure ECM electrical connectors and ground circuits are okay. If either are defective, repair and repeat testing to confirm ECM malfunction. On models equipped with engine immobilizer, if ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.
NOTE:
If DTCs related to MAF, IAT, TPS, ECT, HO2S and/or A/F sensor are output simultaneously, the E2 sensor ground circuit at ECM 34-pin connector E4 terminal No. 28 (Brown wire) may be open. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. For ECM connector terminal identification, see Figure.