General Information

Engine Control

P1501 Battery Temperature Too High Diagnostic - General Information

Component Location





General Description

Many control units have applied to vehicle as it becomes more electronically. These units control their own system based on information from diverse sensors. Therefore necessity of common use of diverse sensor information and importance of stable power supply are gathering strength. Battery sensor is mounted on battery (-) terminal. It transmits battery voltage, current, temperature information to ECM. ECM controls generating voltage by duty cycle based on these signals.

DTC Description

ECM sets this code when the battery temperature from battery sensor is too high.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data








Fig 1) Normal data of battery sensor temperature at 10.5 °C (51 °F)
Fig 2) Abnormal data of battery sensor temperature when battery sensor circuit open.