P0688
Powertrain Codes
P0688 - DODGE - Auto Shutdown Relay Control Circuit Low
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- ASD relay circuit is open or shorted - Failed Auto Shutdown relay - Failed ECM
Tech Notes
Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.
Description
The Front Control Module (FCM) has detected the supply voltage below an acceptable value