Possible Causes
| POSSIBLE CAUSES |
|---|
| 5-VOLT SUPPLY CIRCUIT OPEN/HIGH RESISTANCE |
| 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND |
| FTP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| FTP SENSOR SIGNAL CIRCUIT SHORTED TO THE SENSOR GROUND CIRCUIT |
| FUEL TANK PRESSURE (FTP) SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .