P1a29 obd2 code on 2019 Pacifica hybrid - 2017+ Chrysler Pacifica Minivan Forums
 2Likes
  • 1 Post By Car Dr.
  • 1 Post By TMaclay
 
LinkBack Thread Tools
post #1 of 6 (permalink) Old 12-02-2018, 05:38 PM Thread Starter
Member
 
Join Date: May 2018
Posts: 43
P1a29 obd2 code on 2019 Pacifica hybrid

Can anyone tell me what this means or suggests? The check engine light was on for 24 hours then turned off when I got home and plugged it in. Thanks!
jejunum is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 12-03-2018, 12:36 AM
Member
 
Join Date: Oct 2018
Posts: 82
Code is for “Cell supervisory circuit A failure”. Might have a bad connection in the battery since the light went out. I would get it to the dealer to get it checked out. Might need a new Hybrid battery.
m0ebius604 likes this.
Car Dr. is offline  
post #3 of 6 (permalink) Old 12-03-2018, 01:50 PM Thread Starter
Member
 
Join Date: May 2018
Posts: 43
Quote:
Originally Posted by Car Dr. View Post
Code is for “Cell supervisory circuit A failure”. Might have a bad connection in the battery since the light went out. I would get it to the dealer to get it checked out. Might need a new Hybrid battery.

Called the dealership and they said don't worry about it since it turned off. Terrible response, I asked them what it was "the car is too new i don't know" so I asked them to look it up! They will call me back supposedly.
jejunum is offline  
 
post #4 of 6 (permalink) Old 12-04-2018, 08:31 AM
Senior Member
 
Join Date: Mar 2017
Location: Yorktown, Va
Posts: 193
As Car Dr has indicated, it's saying there was a fault detected in the HV battery supervisory circuit A. This would be either as wiring, harness connectors or electronic components. All this is based on my reading of an early 2017 shop manual for the PacHy which I bought when I got my PacHy in May 2017.

There is also a circuit B. These two are supervisory circuits which appear to be used to communicate information from numerous other sensors within the HV battery. There are many other diagnostic codes for the battery pack which would indicate problems via these sensors if temperature, voltage, current or other problems exist. The service manual indicates the vehicle may shut down if this code is set. Fortunately, that didn't happen in your case.

These circuits are internal to the HV battery assembly and, since FCA considers that assembly not repairable at the dealer level, apparently all they can do is disconnect external harness connectors to the HV battery pack (presumably related to the battery pack control module?), inspect them and reseat them.

In my opinion, the dealer can/should hook up the diagnostic equipment and check for pending codes as well as other data to investigate this problem since it could shut you down on the road if it reoccurs. Based on the diagnostic procedure in the service manual, it does not appear they will replace the HV battery unless the DTC returns after the harness connections are checked.

I agree with you that the dealer's initial "Don't worry be happy.." response is terrible. Hope the above helps & good luck.
lashton likes this.

2017 Silver Teal Hybrid
2014 BMW i3 REX
2005 Grand Caravan SXT
1999 Voyager
2003 BMW 530i
2000 BMW 528iT
TMaclay is offline  
post #5 of 6 (permalink) Old 06-06-2019, 03:41 PM
Junior Member
 
Join Date: Jun 2019
Posts: 1
P1A29 and P1A2A codes

Yesterday I got a check engine light leaving work going home on my 2019 PacHy Limited that I bought 2 weeks ago. Engine did not cut off, but I immediately pulled over and tried turning the engine off and back on. The engine light remained. Since the car seemed to be driving just fine, I continued to drive home. When I got home about 30 minutes later, I plugged in my OBD2 reader and the light turned off. Looking at the historical error codes I saw P1A29 and P1A2A code. Google search indicates that it seems to be the Hybrid battery voltage sensor and also saw this thread. Was there any resolution to this issue? I do have an appointment with the dealership tomorrow.
Kaye is offline  
post #6 of 6 (permalink) Old 06-10-2019, 07:45 AM
Senior Member
 
Join Date: Oct 2016
Location: Auburn Hills, MI
Posts: 1,949
Quote:
Originally Posted by Kaye View Post
Yesterday I got a check engine light leaving work going home on my 2019 PacHy Limited that I bought 2 weeks ago. Engine did not cut off, but I immediately pulled over and tried turning the engine off and back on. The engine light remained. Since the car seemed to be driving just fine, I continued to drive home. When I got home about 30 minutes later, I plugged in my OBD2 reader and the light turned off. Looking at the historical error codes I saw P1A29 and P1A2A code. Google search indicates that it seems to be the Hybrid battery voltage sensor and also saw this thread. Was there any resolution to this issue? I do have an appointment with the dealership tomorrow.
Hello Kaye,

We're sorry to hear about this unexpected check engine light. How did your appointment to go? If any assistance is needed at this time, please don't hesitate to send me a direct message. I'll do what I can to help.

Jasmine
Chrysler Social Care Specialist
ChryslerCares is online now  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the 2017+ Chrysler Pacifica Minivan Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
2018 Pacifica Hybrid - Service Charging System denfor26 2017+ Pacifica PHEV Hybrid Maintenance And Service 20 05-27-2019 05:36 PM
2019 Pacifica Hybrid [email protected] New Member Introductions 2 11-26-2018 05:38 PM
Official Pricing from $28,595 joet67 Dealers, Purchasing and Ordering 7 07-21-2016 09:41 PM
Why Chrysler made the Pacifica Hybrid joet67 2017+ Chrysler Pacifica PHEV Hybrid General Discussion 1 01-29-2016 09:55 AM
Official Press Release joet67 2017+ Chrysler Pacifica Minivan General Discussion 0 01-28-2016 02:56 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome