DTC P0031, DTC P0032, DTC P0037, DTC P0038, DTC P0051 Or DTC P0052: Notes

WARNING: This page is about a different car, the 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

Code Definition

DTC P0031: Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
DTC P0032: Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 1)
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 P0051: Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 1)
DTC P0052: Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 1)

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 - TOYOTA article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.