Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- If a DTC P0453 is intermittent, road test the vehicle while observing the FTP sensor with a scan tool. A momentary reading of more than 4.50 volts may indicate an open in the sensor input or ground circuit.
- If a DTC P0453 is intermittent, driving the vehicle under the conditions outlined in the Inspection/Maintenance (I/M) section can verify whether the fault is present. Refer to Inspection/Maintenance (I/M) Evaporative Emission (EVAP) System Set Procedure .
- An intermittent malfunction may be caused by a fault in the sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
- Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.
- The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.