Possible causes

– Battery Module

Tech notes

There is a factory service bulletin for the following Honda models:

2000 Honda Insight
2001 Honda Insight
2002 Honda Insight
2003 Honda Insight
2004 Honda Insight
2000-2004 Honda Insight Factory Service Bulletin OBDII Code P1449

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1449 HONDA Description

The high-voltage battery in the IMA (integrated motor assist) system is designed to operate within the upper and lower limits of the SOC (state of charge) voltage and the battery capacity limits. When the battery deteriorates, the voltage is subject to an increase or a decrease, so the limits of the battery capacity is narrowed. Therefore, if the upper and lower limits of the SOC are detected when driving, the BCM (battery condition monitor) calculates the sum of the current and calculates the battery capacity. If the power is less than a set value, a malfunction is detected and a DTC is stored.

HONDA Technical Service Bulletins for P1449 code