Greetings,

I recently took my '03 HCH, with 138K, into the shop for a 30K mile maintenance. Going into it, the IMA light was on as well as the check engine. They ran a systems check and came up with P1420 (cat deterioration, which explained the check engine light) and 1601 (battery module deterioration). They told me I would need to replace my 144v IMA (the previous one was replaced 3 years ago from the dealership and conveniently past warranty).

I did some research and replaced the IMA myself after the mechanic told me it would be 4000+ to replace the cat, the IMA, and a trans mount.

FF to this week: I received and installed a brand new battery (5 year extended warranty) from bumblebee batteries. Started the car to charge and the check engine, 12v, and 144v lights came on. The new battery also did not charge or read in my system, but is drivable.

I took it to a friends to run the error codes. After erasing and reading again, 1600 (basic IMA issue), 1569 (bad housing temperature sensor in IMA), and 1637 (?) came up immediately.

**The 12v was replaced a year ago and is in good working condition.**

Does anyone have any suggestions? I have an appointment to take it into the mechanic on monday, but I would like to fix the issues myself before then.

 

Some guy over at ecomodder had your exact problem.

Check over there.

Steve.