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EMISSION CONTROL - V8 DESCRIPTION AND OPERATION 17-2-23 For systems utilising the vacuum method for determining evaporation leaks, the sensor is used to monitor for a drop The fuel tank pressure sensor is part of the NAS OBD system, a component failure will not be noticed by the driver, l Damaged or blocked sensor l Harness / connector faulty l Sensor earthing problem l Open circuit l Short circuit to battery voltage l Short circuit to ground l ECM fault Possible failure symptoms of the fuel tank pressure sensor are listed below: l Fuel tank pressure sensor poor performance l Fuel tank pressure sensor low range fault l Fuel tank pressure sensor high range fault If the fuel tank pressure sensor should malfunction, the following fault codes may be stored in the ECM diagnostic P-code Description P0451 Fuel tank pressure signal stuck high within range P0452 Fuel tank pressure signal short circuit to battery voltage (out of range - High) P0453 Fuel tank pressure signal short circuit to ground or open circuit (out of range - Low) |