If the IMA light is on, page 12-5 of the Insight Service Manual says:
If the IMA system indicator lamp stays on, check the DTC (diagnostic trouble code). The dealer should have read a code. I would take it to an auto parts store if you don't have an OBD reader and have them check it. Then go back to the dealer armed with the code number and definition as well as a copy of this:
HONDA AUTOMOBILE DIVISION
American Honda Motor Co., Inc.
1919 Torrance Blvd.,
P.O. Box 2215
Torrance, CA 90509-9870
Summer 2006
Warranty Extension: Insight Integrated Motor Assist Battery Module
Dear Insight Owner:
This letter is to notify you of a warranty extension on your vehicle's integrated motor assist (IMA) battery Module. Warranty Extension Details
The integrated motor assist (IMA) system in your vehicle assists the gasoline engine for better acceleration. To ensure the IMA system remains in top condition, we are announcing a warranty extension for the IMA battery module. The IMA battery module is now covered for 10 years or 150,000 miles, whichever occurs first.
If the IMA indicator on your vehicle's instrument panel stays on while you are driving, take your vehicle to any Honda dealer for an inspection. If the dealer finds the problem to be the IMA battery module, they will replace it. Depending on your vehicle's year and model, the dealer will also replace one or two additional control modules in the IMA system. This work will be done free of charge. Please plan to leave your vehicle at the dealer for a day to allow them flexibility in scheduling.
What to do if you feel this notice is in error
Our records show that you are the current owner or lessee of a 2000-04 Insight receiving this warranty extension.
If this is not the case, or the name/address information is incorrect, please fill out and return the enclosed postage paid Information Change Card. We will then update our records.
If you paid to have a defective IMA battery module replaced sometime in the past, you may be eligible for reimbursement. Refer to the attached Instructions for Reimbursement for eligibility requirements and the reimbursement procedure.
If you have questions.
If you have questions about this notice, or need help contacting a Honda dealer, please call Honda Automobile Customer Service at (800) 999-1009.
Sincerely,
American Honda Motor Co., Inc. Honda Automobile Division