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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Fault Or DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Notes

DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Fault Or DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control: Notes

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.
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