DTC Advanced Diagnostics: P2148 (3.0L Engine)
DTC P2148: Powertrain Control Module (PCM) Injector Power Supply Circuit Malfunction
General Description
The injector supplies fuel to the engine and is controlled by the powertrain control module (PCM) ON/OFF command. The injector driver IC equipped in the PCM controls the DC-DC voltage converter to boost the voltage and supplies to the injector. The injector driver IC monitors the voltage that is generated in the DC-DC voltage converter. If the monitored voltage is determined as over charged, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 0.5 second or more |
| DTC Type | Two drive cycles, MIL on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Elapsed time after the vehicle is turned to the ON mode | 100 milliseconds | - |
| 12 volt battery voltage [Battery] | 10.0 V | - |
[ ]: HDS Parameter
Malfunction Threshold
The PCM detects an abnormal condition (over charged) of the injector driver IC for at least 0.5 second.
Possible Cause
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC, the freeze data, and the on-board snapshot are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.