Heavy noise of ICE engine in winter

  • Thread starter Thread starter JKroll
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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.
 
Landshark said:
Have you had an opportunity to drive the car in cold temperatures with a charged HV battery to see if the issue has resolved?
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When the battery is charged and ICE engine is used there is no noise.

When you are driving and battery drains to zero and ICE engine kicks in, the noise is unbearable. If this was a feature of Honda PHEV, they should have addressed it by keeping min battery charged.

Its stupid to constantly look at battery levels and switch to HV manually.
 
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