Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2004 Dodge Ram 5.7 Hemi Check Engine Light › Reply To: 2004 Dodge Ram 5.7 Hemi Check Engine Light
March 7, 2021 at 1:26 pm
#989288
My suggestion would be first diagnose the P0456.
Smoke test the EVAP system to locate the leak.
This whine you describe could be any one of a number of possibilities:
Failing accessory IE. water pump, alternator, power-steering pump …
Failing tensioner or bearing.
Fan belt
Cooling fan / clutch
You’ll need to check each one.