Heavy noise of ICE engine in winter

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Having recently replaced the 12V battery a capacity reading will be inaccurate for several months. If there hasn’t been a noticeable decline in actual EV range or a dash display indicating a problem with the HV battery, it would be reasonable to conclude that that the HV battery capacity is above the warranty threshold.

The issue here is operating a PHEV with a depleted traction battery. It’s the nature of the beast and is a situation that should be avoided. Keep some charge on the battery or put it in HV+ to restore some charge while driving.

As much as I am a fan of the PHEV idea, having owned 2, the reality is they’re more of a PITA.
 
Landshark said:
Having recently replaced the 12V battery a capacity reading will be inaccurate for several months. If there hasn’t been a noticeable decline in actual EV range or a dash display indicating a problem with the HV battery, it would be reasonable to conclude that that the HV battery capacity is above the warranty threshold.

The issue here is operating a PHEV with a depleted traction battery. It’s the nature of the beast and is a situation that should be avoided. Keep some charge on the battery or put it in HV+ to restore some charge while driving.

As much as I am a fan of the PHEV idea, having owned 2, the reality is they’re more of a PITA.
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Why is it a problem with PHEV but not say Accord Hybrid
 
The Accord Hybrid is commonly referred to as a Mild Hybrid. It uses a relatively small battery to run a motor that adds some power and occasionally completely propels the car for short distances. The engine keeps the battery charged between about 40-80%. It won’t become fully discharged unless something goes wrong. Even if it did, its contribution to the whole operation is minimal, so you may not even notice. The battery in a PHEV is much larger and plays a more significant role. When it becomes depleted the performance of the vehicle can be significantly impacted.

The Clarity and our Jeep 4xe both default to a battery depleting mode upon start up. I suspect that most, if not all PHEV’s operate similarly in order to meet a MPG claim. Neither the Clarity or Jeep offer an alternative to the default mode that I’m aware of or wouldn’t require some type of software hack. It’s a first word problem for sure. I don’t care for problems, first world or otherwise, so the solution is to buy conventional ICE vehicles or mild hybrids.

FWIW: our Jeep 4xe PHEV has been parked outside the garage, at a distance from other buildings, because we received another recall notice that the battery may spontaneously combust. We dealt with the same issue a year ago and the solution was a software fix, which not surprisingly didn’t work. Now they’re going to attempt another software fix or possibly a battery replacement. Once done the car will be sold and replaced with a mild hybrid from Toyota.
 
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