DTC B1503: Exhaust Heat Management Warning Detected: Description

This DTC is stored when the combination meter assembly detects a malfunction in the engine coolant temperature sensor that is connected to the combination meter assembly via a direct line.

DTC No.	DTC Detection Condition	Trouble Area
B1503	When IG voltage is 9.5 V or more and the following conditions is detected: Engine coolant temperature sensor operation malfunction Engine coolant temperature sensor circuit open or short Engine coolant temperature is 120°C (248°F) or more	Harness or connector Engine coolant temperature sensor Combination meter assembly (No. 3 meter circuit plate)

HINT:

This DTC is for the engine coolant temperature sensor which is used to detect the engine coolant temperature for the exhaust heat recirculation system, not for the engine coolant temperature sensor which is used for the EFI system.