General Information

Component Location





General Description

The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure Sensor (FTPS) is an integral part of the evaporative monitoring system. The ECM monitors the FTPS signal to detect vacuum decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.

DTC Description

The fuel tank pressure sensor diagnostic will detect a fuel tank pressure sensor signal that is out of range or malfunctioning. The Tank Pressure Sensor Circuit Diagnostic compares the sensor input voltage to low and high limits. When the analog voltage is outside the allowable limits, the circuit is determined to be failed.
Checking output signals of tank pressure under detecting condition, if the tank pressure is low than 2V PCM sets P0452. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition





Specification





Schematic Diagram