Vehicle Questions and Answers
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What could be the reason behind the engine sound of a Honda Clarity Plug-in Hybrid when in HV mode?
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★ Top Answer
If you're experiencing engine noise in HV mode on your Honda Clarity PHEV, the likely cause is low oil levels. Insufficient lubrication makes the engine strain in this mode. You'll need to use 0W-20 synthetic motor oil, with a total volume of 3.3 US quarts when including the filter. Since the capacity is relatively small, purchasing a one-gallon jug should suffice for a complete fill-up.
More answers
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If a Honda Clarity is making a tapping or engine noise, known as a tappet, it's probably due to low oil pressure, excessive valve lash, or worn-out and damaged components.
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