P0453

(P0453) FUEL TANK PRESSURE SENSOR CIRCUIT HIGH





When Monitored and Set Condition
^ 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 SHORT TO 5-VOLT SUPPLY CIRCUIT
- FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT OPEN
- 5-VOLT SUPPLY CIRCUIT OPEN
- 5-VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE
- SENSOR GROUND CIRCUIT OPEN
- FUEL TANK PRESSURE SENSOR
- POWERTRAIN CONTROL MODULE



Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on. With the DRBIII, read PCM DTCs.
Is this DTC present?
Yes >> For complete diagnosis of this DTC, refer to (P0451) FUEL TANK PRESSURE SENSOR PERFORMANCE. P0451
No >> Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Note: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

Note: Check for any Technical Service Bulletins that may apply.

Were there any problems found?
Yes >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST - VER 2 Powertrain Verification Test - Ver 2.
No >> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.