P0AC9 OBD-II: Hybrid Battery Temperature Sensor "B" Circuit Intermittent/Erratic
P0AC9 Severity
Should you fix P0AC9 yourself?
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
What causes OBD-II fault code P0AC9?
The hybrid battery pack uses multiple sensors to monitor the temperature of each battery cell. If one of the battery temperature sensors reports an implausible temperature, code P0AC9 will set.If multiple sensors fail, the High Voltage System may be disabled.
OBD II Fault Code
- OBD II P0AC9
OBD-II Code High voltage control module failure is defined as a Hybrid Battery Temperature Sensor "B" Circuit Intermittent/Erratic
The hybrid battery pack uses multiple sensors to monitor the temperature of each battery cell. If one of the battery temperature sensors reports an implausible temperature, code P0AC9 will set.If multiple sensors fail, the High Voltage System may be disabled.
Common Problems That Trigger the P0AC9 Code
- Battery Control Module Failure
- High voltage battery assembly failure
- High voltage control module failure
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