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