Enthusiast Thread Starter Join Date: Oct 2019 Posts: 8
My 2012 Civic hybrid has about 137,000 and has not had any issues until today. As I approached a red light, the IMA system stopped working. No brake assist, no auto off,no hybrid assist. I limped back home as cvt was not downshifting. Also couldn’t rev above 2000 rpm in neutral. Made it home and read codes.here’s what I got.... 12 v battery measures 12.67v without engine running. Started engine and voltage dropped to 11.9, but goes to 14.7 when revving.
Battery is original... turned engine off, hooked up float charger and allowed to charge to 100% (started at 84%). The car is at Lehigh Valley Honda in Allentown, PA,. The appointment was for yesterday but they finally pulled it in the shop today. They say the power inverter is bad and needs to be replaced. The part number is 1B200-RW0-000. They quoted $3587.73
($2967 for part only). I went to the dealer to check out the car. The 12v battery was in fact too weak to start the engine. I hooked up my own charger, allowed it to charge to 99% and it started right up. They ran
a (12v) battery test earlier and it failed. My first question was ... if there is a problem with the 12v battery, could that cause the symptoms with the IMA system? They say no. I tend to disagree. I will bring the car home tomorrow, put a new 12v battery in it, then maybe buy the new power inverter if it doesn’t solve the problem. When I read about this vehicle before I purchased it, it said that if there is a battery failure, it could be driven in gas only mode. Apparently, this does not seem to be the case. I welcome anyone who has advice to please chime in. Thanks in Advance!!!! Last edited by jkichline2001; 10-10-2019 at 06:20 AM. Reason: corrected inverter part number
Ridiculously Active Enthusiast Join Date: Sep 2014 Location: Mesa, AZ Posts: 4,582
Quote: Originally Posted by jkichline2001 My hybrid has about 137,000 and has not had any issues
until today. As I approached a red light, the IMA system stopped working. No brake assist, no auto off,no hybrid assist. I limped back home as cvt was not downshifting. Also couldn�t rev above 2000 rpm in neutral. Made it home and read codes.here�s what I got.... 12 v battery measures 12.67v without engine running. Started engine and voltage dropped to 11.9, but goes to 14.7 when revving.
Battery is original... turned engine off, hooked up float charger and allowed to charge to 100% (started at 84%). The car is at Lehigh Valley Honda in Allentown, PA,. The appointment was for yesterday but they finally pulled it in the shop today. They say the power inverter is bad and needs to be replaced. The part number is 18200-RW0-000. They quoted $3587.73
($2967 for part only). I went to the dealer to check out the car. The 12v battery was in fact too weak to start the engine. I hooked up my own charger, allowed it to charge to 99% and it started right up. They ran
a (12v) battery test earlier and it failed. My first question was ... if there is a problem with the 12v battery, could that cause the symptoms with the IMA system? They say no. I tend to disagree. I will bring the car home tomorrow, put a new 12v battery in it, then maybe buy the new power inverter if it doesn�t solve the problem. When I read about this vehicle before I purchased it, it said that if there is a battery failure, it could be driven in gas only mode. Apparently, this does not seem to be the case. I welcome anyone who has advice to please chime in. Thanks in Advance!!!! Year matters. Since you didn't specify, I'm going on the apparent battery type, you have a 2012+ Have you ever replaced your spark plugs? If so, did you replace them with the NGK equivalent or a cheap-o? Did you replace all 8? Are you 100% certain your oil level is between that marks? Both of the above can feel like a rev limiter. The charging/jumping comment by the dealer is BS. A bad 12V can cause a multitude of issues. 14V during rev just means the charging system is working at that moment. The IMA system with an inop HV battery will only charge between about 1500 and 3500 rpm. Check the HV battery fuse. Check ALL fuses in both engine bay fuse boxes. If it turns out to be the Inverter, I've heard from 3 different non-dealer sources in addition to dealers that the inverter is a VIN encoded item and can't be user-replaced. Good luck
Enthusiast Thread Starter Join Date: Oct 2019 Posts: 8
My apologies, it is a 2012. I replaced all 8 spark plugs with NGK equivalents at about 100,000. I was surprised how expensive they were but I did it anyway. Oil level is good also. I do all
scheduled maintenance myself and on time. I�m hoping to keep it a long time.
I think I can do it. I told the mechanic at the dealer that I was going to change it myself and he did not mention anything about VIN encoding. When I order the inverter, I can validate fitment with my VIN Number. Looks like I can get the part for $1800 vs the $3k the dealer quoted. I just want to make sure I can return it if it doesn�t fix the problem. Some of the comments the dealer made makes me nervous about their hybrid knowledge. Thanks so much for the reply. I will be working on this and will post any significant progress. Last edited by jkichline2001; 10-04-2019 at 04:26 AM. Reason: Forgot to mention the fuse
Ridiculously Active Enthusiast Join Date: Sep 2014 Location: Mesa, AZ Posts: 4,582
I've checked the codes from my 06-11 manual, and they are both related to contactors, which are frequently due to a weak 12V. The bogus unknown code is also potentially from low 12V, though certain electronics component failures can thrown unknown codes (inverter?). Given the 12V is the original, it needs to be replaced. I doubt it will fix everything, but it needs to be removed as a variable. IMHO, I would attempt to obtain an inverter from a salvage yard before I dropped the big bucks on a new one. EDIT: I've received 3 calls on 2012 HCH failures, and all three were bad inverters.
Enthusiast Thread Starter Join Date: Oct 2019 Posts: 8
Got a new 12V from NAPA and put it in. As expected, it didn�t fix the problem. Tried to clear codes but still get the hybrid propulsion code. So I disconnected 12V, turned off hybrid battery and took out the inverter. Doesn�t look like there�s much I can do with it other than replace it. I called more than 10 salvage yards and struck out. I�ll look at it more tomorrow
Ridiculously Active Enthusiast Join Date: Sep 2014 Location: Mesa, AZ Posts: 4,582
check car-part.com and lkqonline.com EDIT: How was the battery fuse? Last edited by S Keith; 10-04-2019 at 03:16 PM.
Ridiculously Active Enthusiast Join Date: Sep 2014 Location: Mesa, AZ Posts: 4,582
BTW... I finally located my notes from the last troubleshooting session. Failure of the inverter threw a P1440 code. It was confirmed by the dealership, and the dealership was adamant it was VIN specific. I don't see that the fuse is replaceable according to the parts diagram, or what I mean is that I see no fuse at all in the IPU, but it's almost certainly there somewhere on the battery pack if Honda is at all consistent.
Enthusiast Thread Starter Join Date: Oct 2019 Posts: 8
I didn’t see any fuses after the orange wires coming out of the battery pack where I measured 152V when the switch was on. I assume the fuse is in the battery pack and must be good. Thanks so much for the links. I will make some calls tomorrow. There are a couple promising leads. I looked a little closer at the inverter. It seems the IGBTs are glued to the heat sink, then the leads are soldered to the board above it making it impossible to take apart unless I unsolder every pin. I probably will not attempt that unless I am unable to get a new part for a reasonable price. I don’t see why the part costs $1800. It looks like a pretty simple assembly. Edit:
Last edited by jkichline2001; 10-07-2019 at 10:22 AM. Reason: Found a power inverter video
Enthusiast Thread Starter Join Date: Oct 2019 Posts: 8
Found the problem! I finally decided to take it apart and look further... it’s a blown IGBT In other news, I was able to find a salvaged part (1B200-RW0-000) from Rochester NY for $325 from a car with 19k miles. i probably made about 20 calls until I finally found someone who had one. I hope to have that tomorrow. In the mean time I will search for replacement IGBTs. Then, with any luck, I’ll have a spare update... here’s better pics of blown IGBT. Looked for a couple hours trying to find replacement part but it appears to be a custom Honda part. I think Mitsubishi makes the original part similar to PN CT600DJH060 but I can’t figure out how to buy new ones... There is a publication here with a lot of info. Towards the end of the publication, they mention the J-Series which
looks a lot like the part from the inverter. Last edited by jkichline2001; 10-08-2019 at 10:29 AM. Reason: More info
Enthusiast Thread Starter Join Date: Oct 2019 Posts: 8
Fixed! I am very happy to have my daily driver back! I was driving my motorcycle on nice days and my grandfathers 95 Buick Century on rainy days. Thank you S Keith for your help on this!! The links you sent saved me about $1500! I saved over $3000 overall by doing it myself vs. letting the dealer fix it. I created a case with Honda to see if they are able to help further. If they could make the IGBTs available, I could fix my old one. I'll post if I get more info... Can a Honda Civic Hybrid run without IMA battery?As long as your 12V battery light is not on, your car will most likely continue to operate without causing long-term harm. Some people drive months like this without having a major incident. However, we do not recommend that you drive your car with the IMA light on as it does present some risks.
How do I know if my Honda Civic hybrid battery is bad?First, you'll probably see a sharp decrease in your miles per gallon (MPG). If you're having to take more frequent trips to the gas station, your battery may be reaching the end of its lifespan. Second, your battery simply may not be holding a charge as long as it once did.
What is the life expectancy of a Honda Civic hybrid battery?Your Honda hybrid battery life expectancy is between 6 to 10 years or up to 100,000 miles.
How many batteries does a 2012 Honda Civic Hybrid have?One of the basics to know about how a hybrid runs is that it has two different batteries—there's an electric battery and a 12-volt lead-acid battery. Of course, the two work together, as that is what makes the vehicle a hybrid rather than a standard gas-engine car or a fully electric vehicle.
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2012 honda civic hybrid inverter replacement
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