P0452

Steps 1 - 6:

Steps 7 - 10:

DTC P0452 Fuel Tank Pressure Sensor Low Voltage




Circuit Description
The powertrain control module (PCM) monitors fuel tank pressure sensor of the Enhanced Evaporative system. When the tank pressure output indicates low voltage, PCM will set DTC P0452.

Conditions for Setting the DTC
- Ignition voltage is between 0.3 and 4.7 volts.
- Tank sensor output is less than 0.2 volts tori 2.5 sec.
- 100 test failures within a 200 tests.

Action Taken When the DTC Sets
- The PCM will illuminate the malfunction indicator lamp (MIL) as soon as failure detected.
- The PCM will store conditions which were present when the DTC was set as Freeze Frame and in Failure Records data.

Conditions for Clearing the MIL/DTC
- The PCM will turn the MIL OFF on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
- A history DTC P0402 will clear after 40 consecutive warm-up cycles have occurred without a fault.
- DTC P0404 can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

Diagnostic Aids
Check for the following conditions:
- Open circuit of 5 volt reference line - Inspect wiring harness from PCM to the sensor. The PCM turns P0452, and P0107 at the same time.
- Open circuit or short circuit to ground line - Inspect wiring harness from PCM to the sensor. The PCM turns P0452 and P0107 at the same time.
- Tank fuel pressure sensor malfunction may cause P0452

Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition