Possible Causes
WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (C18) A/C PRESSURE SIGNAL CIRCUIT OPEN |
| (C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO THE (F891) 5-VOLT SUPPLY CIRCUIT |
| (C918) SENSOR RETURN CIRCUIT OPEN |
| A/C PRESSURE TRANSDUCER |
| FCM |
Always perform PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.