Last post on Dec 06, 2013 at 12:14 PM
You are in the Honda Civic Hybrid
What is this discussion about?
Honda Civic, Hybrid Cars, Coupe, Sedan
#184 of 1532 Re: Honda Civic Hybrid IMA Problem [sholmes717]
Dec 03, 2009 (8:39 am)
I had the pleasure of having Wayne Gerdes (look him up on wikipedia) teach me how to hypermile. With him as copilot, driving is strenuous, and terrifying. He taught me how to get over 100 mpg city in my car, but there is no way I'll ever drive that way. He managed over 150mpg in a 2006 HCH.
I got those figures by simply puttering along at 50mph on the highway (the speed limit here), and driving 30 on local streets (also the speed limit) and accelerating gently and braking gently. I drove it like it was an AMC Pacer and I didn't use the AC. I also kept the revs below 2500 on initial launch from lights and below 2000 the rest of the time.
Now it has been proven that cruise control cannot return the same mileage as not using it - to the tune of 3-5 mpg so keep that in mind when you drive.
Let me give you an example of how driving style affects mpg. I drove from NYC to Iowa, around Wisconsin, down to DC and back home last July on about 50 gallons of gas. I was driving 75 mpg and using the AC some of the time. I also had nine batteries in the car by the end of the trip (overloaded by 600 lbs). I averaged 60.5 for the 3,050 mile all-highway trip. When I drive 50-55 with the AC off, I get 75-80mpg.
How fast are you driving when you get 45mpg highway?
#185 of 1532 Re: Honda Civic Hybrid IMA Problem [Ogre_GEV]
Dec 03, 2009 (2:36 pm)
I had to pick up a couple of 2006 HCH battery packs from a junkyard today, so I used my wife's 2008 Chrysler Town & Country (3.8L V6). When I got in, I saw that the mpg meter read 12.9. I reset it and drove a mixed highway and city loop of about 40 miles. I also turned off the AC (it's December). The car has a 6 speed automatic, so I watched what the tach was doing as I drove it. I wasn't in a hurry, so I just took my time and kept up with traffic. The tach only went over 2000 twice when I had to enter a highway with lots of truck traffic (route 1&9 in NJ). The rest of the time it stayed at 1500 or 2000 depending on the gear it was in. I was not trying to save gas.
The result? 19.8 mpg overall for the trip with a peak of 22.3 on the highway. The car is EPA rated 16/23 with a median of 18.
My wife has a lead foot, I do not. Her minivan is so un-aerodynamic, that it's almost impossible to go over EPA without working at it. Honda's hybrids are a different story. By nature, they will perform significantly better than EPA when driven with a feather touch.
#187 of 1532 2009 HCH IMA/Battery Issues
Dec 06, 2009 (11:23 am)
My IMA issues began at 5200 miles. It first started when the battery would begin to recall more frequently and at times I would not have electric motor assist due to the low battery (1-3 bars). This was a safety concern when trying to merge onto a highway. One morning I observed the recall once again, no assist when merging, when rpm reached 5000-6000, that is when the IMA light illuminated.
The HCH was taken to a Honda dealership (not where I purchased the HCH) and it was determined that a software update was needed. A couple of days later the software was uploaded to the vehicle. Within a couple of days from that upload, the battery would start to recall at a countdown (bars: 6,5,4,3,2,1). When departing from work in the morning, the recall once again began, I accelerated to merge on the highway and the IMA light illuminated in addition to the engine light.
The engine light would remain on at every start and the IMA light would illuminate a few minutes after. I took the HCH in to the same dealership and it was determined that a replacement battery pack would need to be ordered for replacement. The battery pack was replaced and it seems to have corrected the problem but just the other day my battery did a recall. The battery charge dropped to one bar and once again I did not have electric motor assist to merge on to the highway. The charge did eventually reach 4-6 bars after a couple of minutes in which assist was available.
My mileage has been between 40-50mpg throughout this whole event. This thread has been very educational on the IMA/battery issues.
#188 of 1532 IMA issues on 2006 HCH II
Dec 10, 2009 (8:58 am)
Ive been experiencing similar problems with my 06 HCH II. At around 45k miles my mileage began to drop from mid forties to mid thirties. I had the dealership do a software upgrade hoping that it would improve things but then the IMA indicator began to be very inconsistent and often dropped below 4 bars where it wouldnt provide any assist particularly on an uphill grade. Ultimately Honda replaced the battery at 70k miles (without any error codes showing) under warranty but the problem still exists so it seems like a firmware issue rather than a battery issue.
#189 of 1532 Re: Honda Civic Hybrid IMA Problem [shonda3]
Dec 10, 2009 (12:54 pm)
I purchased a 2009 Honda Civic hybrid and was getting 41-43 mpg for the first 2000 miles. Then my IMA light came on and my moderates dropped to around 34-36 mpg. I took the car in and was told the "computer need an update". The light stayed off but the mileage stayed down around 34-36. Yesterday, the light came on again.
It sounds like these batteries are crap. I am wondering why Honda hasn't corrected this problem since it sounds like it has been going on for several years. Interestingly, they keep selling a lot of these cars. This does not seem to be a very well-publicized problem. I was not aware of it when I bought the car and probably would not have bought the car if I had known beforehand of this problem.
#190 of 1532 Re: Honda Civic Hybrid IMA Problem [gregr2]
Dec 10, 2009 (9:32 pm)
We are in the same boat. When we bought our 2009 Civic Hybrid we averaged 43mpg 70mph, but could get it up to 52mpg 55mph. After about two months our mpg dropped to about 37mpg. I thought it was due to using the AC (live in CA, central valley).
About a month ago our IMA light came on. We took it to Honda and they did the software update. A couple days later when the car was first started, the battery would drop to one bar and would start charging after driving about 3 miles.
We took it back to honda and they replaced the battery. However now it only charges up to 6 bars and occasionally charges to 7,8. Now it get 40mpg at 55mph. Honda says it is operating normally for both battery and mpg.
#191 of 1532 wow...this should be widespread knowledge!
Dec 14, 2009 (12:57 pm)
It is rather disheartening to read thru this 2 year long thread. I've had my 2009 Civic Hybrid since April 09. I consistently got 38 mpg driving in Atlanta - a mix of city and highway. (I drive a reverse commute). In mid-late November my mileage went down to 32mpg and sluggish performance, very bad acceleration. The peppy acceleration is why I chose it over the Prius. This past Friday (Dec 10) my IMA light went on. Took it to the dealer - they said the same thing - computer upgrade. Just got it back today after tire rotation and oil change and 'computer update'. Will post back after a week to report on performance and mileage.
Although, after reading thru this thread I am considering trading it in - bad acceleration and so-so mileage? Sheesh. This thread is 190 messages long, 122 pages in a word document. I wonder if Honda would like me to distribute it to their showroom customers!
#192 of 1532 Computer Software Upgrade
Dec 14, 2009 (1:58 pm)
I posted last month, before I got the "upgrade".
So, After the upgrade, my MPG dropped from 35-38, down to 29-32. This is a big drop. And, very sluggish acceleration. Besides the "upgrade", nothing's changed; my driving habits, and the way I go to work, etc.. Also, before the upgrade, I could drive 2 and-a-half weeks on a full tank. Now, it's down to 1 and-a-half weeks, so I buying gas more often, just like a regular Honda Civic. Hmmmm, somethng to ponder.
No one still hasn't responded much, last month Honda charged me $175 for the software upgrades. Some say they got it for free. Did Honda screw me over for charging me for the upgrades? Did they charge others?
#193 of 1532 Re: Computer Software Upgrade [mdsheker]
Dec 14, 2009 (2:40 pm)
My dealer did not charge me for the updates.