DTC P0115, DTC P0117 Or DTC P0118: Notes
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.