I have a 2003 Civic Hybrid,
I have a 2003 Civic Hybrid, at 70 000 km CVT transmission was replaced under warranty, at 110 000 km IMA Battery replaced too under extended warranty, 12 V battery 6 months old, have a problem, after few days without use, both battery are drained, now I have to buy a new 12 V battery for sure as they can't handle the deep depletion ... would be nice to find out what is the cause before the IMA battery will die too :( Hybrid technology is nice when works, but too complicated with tons of chance for fault, wouldn't buy again.
2003 HCH batttery/ IMA issue
Car stopped yesterday and would not start. The battery light had been on for 2-3 days. One month ago, I replaced the AC compressor. After reading here, I called AAA and they came and checked my battery. It was very low. Not enough to turn the engine but enough to turn dashboard on. AAA replaced my 12V battery. 6 year warranty. Back in 2011, I replaced the IMA Battery but Honda today wants $3000.
New 12V battery cleared all IMA codes. And it runs amazingly. I am not sure if the battery will drain, but I have 6 years for AAA to replace this battery and hopefully get 200,000 miles on it. It is currently 119K.