P0452

(P0452) FUEL TANK PRESSURE SENSOR CIRCUIT LOW






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
OPEN FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT
OPEN FUEL TANK PRESSURE SENSOR GROUND CIRCUIT
FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
OPEN 5-VOLT SUPPLY
5-VOLT SUPPLY SHORTED TO GROUND
FUEL TANK PRESSURE SENSOR
POWERTRAIN CONTROL MODULE

Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on.
With the DRB III, read the PCM DTCs.
Is this DTC preset?
Yes>> For complete diagnosis of this DTC, 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
No>> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.