DTC P154A: Battery Sensor Internal Failure (2014-15)
General Description
The battery sensor is connected between the 12 volt battery and ground. It is also connected to the gauge control module by the LIN line and transmits/receives battery sensor information to/from the powertrain control module (PCM) via the CAN line. The battery sensor measures the 12 volt battery's current, voltage, and temperature. When the PCM requests this information to operate the engine electrical system efficiently, the battery sensor runs a diagnostic program and sends the results to the PCM via the LIN and the CAN line. If the diagnostic results are outside the normal range, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 5 seconds or more |
| DTC Type | One drive cycle, MIL off |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
Malfunction Threshold
Either one of the conditions is met for at least 5 seconds:
- Internal current detection circuit open or A/D conversion circuit abnormal
- Internal voltage detection circuit open/short or A/D conversion circuit abnormal
- Internal temperature detection circuit open/short or A/D conversion circuit abnormal
- Calibration data abnormal
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Battery sensor internal failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.