# 2009 Chevrolet HHR #C0550

**URL:** <https://community.cartalk.com/t/2009-chevrolet-hhr-c0550/117489>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, hhr\
**Created:** [May 16, 2018, 8:21am UTC](https://community.cartalk.com/t/2009-chevrolet-hhr-c0550/117489 "2018-05-16T08:21:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![LeeElliott](https://avatars.discourse-cdn.com/v4/letter/l/e9c0ed/32.png) [@LeeElliott](https://community.cartalk.com/u/LeeElliott)\
**Post date:** [May 16, 2018, 8:21am UTC](https://community.cartalk.com/t/2009-chevrolet-hhr-c0550/117489/1 "2018-05-16T08:21:19Z")

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Service trac and service Esc. ABS,BRAKE and traction lights on. Code C0550 . Took to shop and were not able to diagnose problem. Glitz in computer??

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [May 16, 2018, 2:18pm UTC](https://community.cartalk.com/t/2009-chevrolet-hhr-c0550/117489/2 "2018-05-16T14:18:41Z")

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DTC C0550 = Internal Fault/Electronic Brake Control Module.

Tester

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**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:** [May 16, 2018, 4:12pm UTC](https://community.cartalk.com/t/2009-chevrolet-hhr-c0550/117489/3 "2018-05-16T16:12:28Z")

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> [@LeeElliott](#):
>
> Took to shop and were not able to diagnose problem

Based on @Testers reply, I’d be looking for a new shop to work on this as the one you have doesn’t seem so good…

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**Author:** ![eddo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/eddo/32/2594_2.png) [@eddo](https://community.cartalk.com/u/eddo)\
**Post date:** [May 16, 2018, 5:30pm UTC](https://community.cartalk.com/t/2009-chevrolet-hhr-c0550/117489/4 "2018-05-16T17:30:44Z")

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this is interesting, I worked on a friends car last Friday that did a very similar thing- his is a 2008 HHR.

His Service ESC light came and caused some sort of limp mode. Car would hardly run. He had different codes than yours though.  
Searching online for a solution, kept coming back with check tire air pressures. Many folks said a tire or two 5psi off of the others will cause the Service ESC to come on- his LF was 5 psi low.

After getting that adjusted (and not sure why this is an issue in a non-AWD vehicle,) his ABS/Brake light is on now. I think his regular mechanic suggested a ABS brake controller.

so, based on my experience, and your code:  
Check the tire pressures and replace the ABS Controller, lol