What Does IMA Warning Light / Integrated Motor Assist System Mean?
Reviewed by automotive technicians · Last updated July 18, 2026
Quick Answer
IMA Warning Light / Integrated Motor Assist System = The Integrated Motor Assist (IMA) hybrid system has detected a fault in the hybrid powertrain. This may involve the IMA battery pack, DC-DC converter, hybrid motor/generator, or the IMA control module. An ORANGE IMA light means a non-critical hybrid system issue — the vehicle can still operate but fuel economy and acceleration performance will be reduced. A RED IMA light means a serious hybrid fault — the vehicle may enter fail-safe mode with significantly reduced power.
Severity: Warning · System: Honda Insight (2019-2025)
DRIVE WITH CAUTION — Repair Soon
The Integrated Motor Assist (IMA) hybrid system has detected a fault in the hybrid powertrain. This may involve the IMA battery pack, DC-DC converter, hybrid motor/generator, or the IMA control module. An ORANGE IMA light means a non-critical hybrid system issue — the vehicle can still operate but fuel economy and acceleration performance will be reduced. A RED IMA light means a serious hybrid fault — the vehicle may enter fail-safe mode with significantly reduced power.
What you see: An orange or red IMA icon or the text 'IMA' illuminated on the instrument panel, sometimes with 'Check IMA System' or 'Hybrid System Problem' message on the driver information display
What to Do Right Now
If the warning is ORANGE: reduce speed and drive to the nearest Honda dealer. The vehicle will operate in a degraded mode with reduced power and fuel economy. If the warning is RED: pull over to a safe location as soon as possible. The vehicle may enter fail-safe mode and shut down the IMA system — you will lose electric motor assist and the engine will operate alone. Do NOT attempt aggressive acceleration. Have the vehicle diagnosed at a Honda dealer — the IMA system requires specialized diagnostic equipment that independent shops typically do not have.
Repair Cost Estimate
| Option | Est. Cost | Notes |
|---|---|---|
| Do It Yourself | $0 (may be a 12V battery issue — have it tested free at any auto parts store); IMA system repairs are NOT DIY-safe due to high-voltage components (100+ volts) | If you have basic tools and mechanical knowledge |
| Mechanic / Dealer | $150-300 diagnostic; $500-1,500 for IMA battery module replacement; $800-2,000 for DC-DC converter replacement; $2,000-4,000 for IMA motor/generator replacement | Includes diagnostic labor + parts |
About This Data
Dashboard warning light information compiled from Honda owner's manuals, OEM service documentation, SAE J2402 standards, and NHTSA guidance. This is an independent reference — not affiliated with or endorsed by Honda. All brand names, model names, and dashboard symbols are trademarks of their respective vehicle manufacturers.
Published: 2026-07-18 · Repair costs are national averages and vary by location. Always get multiple quotes before authorizing repairs.
⚠️ Red dashboard lights demand immediate action — continued driving may cause engine damage or brake failure. When in doubt, pull over and consult a certified mechanic.
Frequently Asked Questions
Can I drive my Honda Insight with the IMA Warning Light on?
If the light is orange, you can drive cautiously to a dealer — reduce speed and avoid aggressive acceleration. Fuel economy and performance will be reduced. If the light is red, pull over when safe and limit driving — the IMA system may shut down, causing reduced power and potential stalling in severe cases.
How much does it cost to fix the IMA Warning Light on a Honda Insight?
DIY cost estimate: $0 (may be a 12V battery issue — have it tested free at any auto parts store); IMA system repairs are NOT DIY-safe due to high-voltage components. Mechanic/dealer estimate: $150-300 diagnostic; $500-1,500 for IMA battery module replacement; $800-2,000 for DC-DC converter replacement; $2,000-4,000 for IMA motor/generator replacement. The Honda IMA battery warranty is 10 years/150,000 miles in California-emission states, 8 years/100,000 miles elsewhere. Costs vary by location, shop rate, and whether additional components are found to be damaged during diagnosis. Always get 2-3 quotes before authorizing repairs.
What causes the IMA Warning Light to come on in a Honda Insight?
The IMA control module has detected a fault in the hybrid system. Common causes include a failing 12V auxiliary battery (most common and least expensive — test this first), IMA battery pack cell degradation from age or extreme temperatures, DC-DC converter malfunction, IMA motor/generator bearing wear, or a corroded high-voltage connector. The 2019-2021 Insight has a known issue with DC-DC converter failures — check if your VIN is covered under the Honda hybrid component extended warranty.