Possible Causes
| POSSIBLE CAUSES |
|---|
| FUEL TANK PRESSURE (FTP) SENSOR 5-VOLT SUPPLY OPEN/HIGH RESISTANCE |
| HIGH RESISTANCE IN THE FTP SIGNAL CIRCUIT |
| HIGH RESISTANCE IN THE SENSOR GROUND CIRCUIT |
| OBD VENT VALVE STICKING CLOSED/FILTER PLUGGED |
| ESIM FRESH AIR FILTER BLOCKED |
| PURGE SOLENOID STICKING OPEN (LEAKING) |
| FUEL TANK PRESSURE (FTP) SENSOR |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .