P0451-Fuel Tank Pressure Sensor Performance: Notes
- When Monitored : With the engine running at idle speed.
- Set Condition : Low limit: The Fuel Tank Pressure Sensor voltage is less than 0.1 volt for 10 seconds. High limit: The Fuel Tank Pressure Sensor voltage is greater than 4.7 volts for 10 seconds. Signal curve: The Fuel Tank Pressure Sensor Performance code will be set if the signal remains constant.
| Possible Causes |
|---|
| FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE |
| FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT OPEN |
| FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND |
| FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT |
| FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY CIRCUIT |
| 5-VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE |
| 5-VOLT SUPPLY CIRCUIT OPEN |
| 5-VOLT SUPPLY CIRCUIT SHORT TO GROUND |
| 5-VOLT SUPPLY CIRCUIT SHORT TO SENSOR GROUND CIRCUIT |
| SENSOR GROUND CIRCUIT OPEN |
| FUEL TANK PRESSURE SENSOR |
| POWERTRAIN CONTROL MODULE |
For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .