Possible Causes
WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
| (F891) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE |
| (F891) 5 VOLT SUPPLY CIRCUIT OPEN |
| (F891) 5 VOLT SUPPLY CIRCUIT SHORTED TO (C18) A/C PRESSURE SIGNAL CIRCUIT |
| (C918) FCM SENSOR RETURN CIRCUIT OPEN |
| A/C PRESSURE TRANSDUCER |
| INTEGRATED POWER MODULE (IPM) |
| FRONT CONTROL MODULE (FCM) |