DTC P0115, DTC P0117 Or DTC P0118: Notes

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Code Definition

P0115: Engine Coolant Temperature Circuit
P0117: Engine Coolant Temperature Circuit Low Input
P0118: Engine Coolant Temperature Circuit High Input

NOTE: For information on engine immobilizer system, see COMPUTERIZED ENGINE CONTROLS in THEORY & OPERATION article.

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM harness connector 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.

NOTE: If DTCs P0110, P0115 and P0120 are output together, check ground circuit E2 (Brown/White wire). Repair as necessary. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.