DTC P2195, DTC P2196, DTC P2197, DTC P2198, DTC P2237 & DTC P2240: Notes

WARNING: This page is about a different car, the 2003 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

Code Definition

DTC P2195: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1)
DTC P2196: Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1 Sensor 1)
DTC P2197: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 2 Sensor 1)
DTC P2198: Oxygen (A/F) Sensor Signal Stuck Rich (Bank 2 Sensor 1)
DTC P2237: Oxygen Sensor Pumping Current Circuit/Open (For A/F Sensor) (Bank 1 Sensor 1)
DTC P2240: Oxygen Sensor Pumping Current Circuit/Open (For A/F Sensor) (Bank 2 Sensor 1)

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - LEXUS article in GENERAL INFORMATION.