Pinpoint Test AJ: The Low Engine Oil Pressure RTT (RECONFIGURABLE Telltale) Warning Indicator Is Never Or Always On: Notes
The Low Engine Oil Pressure RTT Warning Indicator Is Never Or Always On
Refer to Instrument Cluster for schematic and connector information.
Normal Operation and Fault Conditions
See Low Engine Oil Pressure. REFER to: Message Center - System Operation and Component Description .
If the engine rpm data or engine oil pressure warning message is missing for less than 5 seconds, the IPC defaults the low engine oil pressure warning RTT indicator to the last state (on or off), based upon the last message received.
If the engine rpm data or engine oil pressure warning message is missing for 5 seconds or longer, the IPC defaults the low engine oil pressure warning RTT indicator on.
DTC Chart - PCM
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P0521 | Engine Oil Pressure Sensor/Switch "A" Circuit Range/Performance | Sets in the PCM when the PCM detects signal variation outside of the module parameters on the hardwired input from the engine oil pressure switch. |
| P0522 | Engine Oil Pressure Sensor/Switch "A" Circuit Low | Sets in the PCM when the PCM detects a short to ground on the hardwired input from the engine oil pressure switch. |
| P0523 | Engine Oil Pressure Sensor/Switch "A" Circuit High | Sets in the PCM when the PCM detects an open on the hardwired input from the engine oil pressure switch. |
| P0524 | Engine Oil Pressure Too Low | Sets in the PCM when the PCM detects low engine oil pressure. |
Possible Sources
- Wiring, terminals or connectors
- Tachometer concern
- Message center concern
- Engine oil pressure sensor
- Engine oil pressure concern
- GWM concern
- PCM concern
- IPC
Visual Inspection and Diagnostic Pre-checks
Inspect the:
- engine for noise or other symptom indicating a base engine or low engine oil pressure concern.
- engine oil pressure switch for signs of external damage.
- engine oil pressure switch connector for signs of corrosion.
- harness for damage indicating an open or short to ground.