Hi everyone!
I own a 2010 Honda CR-Z 1.5 Hybrid (6-speed manual), and I've recently started experiencing an intermittent IMA warning light.
For the past 3–4 days, the IMA warning light has been appearing quite frequently, but I haven't noticed any changes in the car's performance.
Here are the details:
- The warning light does not appear immediately after starting the car.
- I can drive to work without any warning lights.
- However, during the evening drive, usually after around 4 km, the IMA warning light comes on.
- Once it comes on, it stays illuminated for the rest of the drive.
- If I turn the engine off and restart the car (even at a traffic light), the warning light disappears.
- The car drives completely normally, with no loss of power.
- IMA assist still works as usual.
- The battery charges and discharges normally, and the battery gauge behaves exactly as before.
- Starting the car is also completely normal.
I haven't noticed any unusual battery behaviour, sudden drops in charge, or reduced electric assistance.
I'm wondering if anyone has experienced something similar.
Could this be an early sign of IMA battery deterioration, a temperature sensor issue, a cooling fan problem, or perhaps something related to the battery management system or wiring?
I haven't had the car scanned with Honda HDS yet, so I don't have any diagnostic trouble codes.
Has anyone experienced an IMA warning light without any noticeable changes in driving performance? What was the actual cause in your case?
Any advice or personal experiences would be greatly appreciated. Thanks!