# 2006 Impala SS

**URL:** <https://community.cartalk.com/t/2006-impala-ss/123783>\
**Category:** Maintenance/Repairs\
**Created:** [August 27, 2018, 4:13am UTC](https://community.cartalk.com/t/2006-impala-ss/123783 "2018-08-27T04:13:44Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mike\_Radcliffe](https://avatars.discourse-cdn.com/v4/letter/m/c0e974/32.png) [@Mike\_Radcliffe](https://community.cartalk.com/u/Mike_Radcliffe)\
**Post date:** [August 27, 2018, 4:13am UTC](https://community.cartalk.com/t/2006-impala-ss/123783/1 "2018-08-27T04:13:44Z")

</div>

My impala has recently sent a p0621 code. Generator lamp L circuit malfunction.

The AC compressor seized about a month ago and I replaced it. I had to remove the alternator to get the belt back on but the alternator is currently charging the battery normally. Any ideas as to what the issue could be? I need to get it inspected and I assume it won’t pass even though the code has nothing to do with emissions.

---

<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [August 27, 2018, 1:13pm UTC](https://community.cartalk.com/t/2006-impala-ss/123783/2 "2018-08-27T13:13:50Z")

</div>

Take a look here:

> **[P0621 Generator Lamp L Control Circuit Malfunction](https://www.obd-codes.com/p0621)**
>
> How to easily diagnose, repair, and info on causes of a P0621 trouble code that indicates a detected failure of the generator lamp L control circuit.

Since the AC compressor swap and error code SEEM related, I’d be checking the wiring on the alternator carefully to see if you’ve damaged a wire when the compressor was changed. Other causes are in the article.