P0521-Engine Oil Sensor Over Temperature: Notes
- When Monitored : With the engine running.
- Set Condition
: Anytime the Powertrain Control Module (PCM) senses the Oil Temperature rises above 121°C (250°F).NOTE: Check and verify that the engine oil level and coolant level are at the appropriate levels.
| Possible Causes |
| LOW COOLANT LEVEL |
| THERMOSTAT OPERATION |
| OIL SENSOR SIGNAL CIRCUIT OPEN |
| OIL SENSOR SIGNAL CIRCUIT SHORT TO GROUND |
| OIL SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE |
| 5-VOLT SUPPLY CIRCUIT OPEN |
| 5-VOLT SUPPLY CIRCUIT SHORT TO GROUND |
| 5-VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE |
| 5-VOLT SUPPLY CIRCUIT SHORT TO SENSOR GROUND CIRCUIT |
| OIL SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT |
| OIL SENSOR SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY CIRCUIT |
| SENSOR GROUND CIRCUIT OPEN |
| MANIFOLD ABSOLUTE PRESSURE SENSOR |
| ENGINE OIL SENSOR |
| POWERTRAIN CONTROL MODULE |
For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .