1jrod573
Posts: 6
Joined: Tue Apr 28, 2020 7:28 pm

Rex problems

Tue Apr 28, 2020 7:34 pm

I've had my 2016 i3 for 6 months and recently I have the dreaded "electric range only, drivetrain error" message. Before having this issue I noticed my steering felt very heavy like the power steering was going out. I did some research and replaced the 12v battery. The rex worked fine until the next day. Now I have the same problem. My rex will run in emissions mode no problem. However, it won't run to hold soc. I don't have a code reader, have not registered the battery bc the dealership is over 100 miles away. Any ideas?

alohart
Posts: 2120
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Rex problems

Wed Apr 29, 2020 12:32 am

Bad fuel pump relay. Inexpensive and you can replace it yourself.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

User avatar
MKH
Gold Member
Posts: 632
Joined: Fri Nov 02, 2018 5:48 am
Location: Dallas

Re: Rex problems

Wed Apr 29, 2020 5:42 am

Inexpensive and you can replace it yourself.
https://www.youtube.com/watch?v=KkF5VvmlZCM
Mark H.
2015 i3 Rex, Capparis White, Tera World, Technology & Driving Assistant, Parking Assistant, Harman Kardon Audio System, 19 inch 427 wheels, EVoInnovate EVSE

JohnWasser
Posts: 64
Joined: Sat Mar 07, 2020 6:15 pm

Re: Rex problems

Wed Apr 29, 2020 7:21 am

Some of the power steering problems were fixed in software in late 2019. See these Service Information Bulletins:

SPORADIC REDUCTION OF STEERING ASSISTANCE
Service Information Bulletin 32 11 19
https://static.nhtsa.gov/odi/tsbs/2019/ ... 5-9999.pdf

POWER-ASSISTED STEERING INTERMITTENTLY NOT AVAILABLE AT ENGINE START-UP
Service Information Bulletin 32 02 14
https://static.nhtsa.gov/odi/tsbs/2016/ ... 4-9999.pdf

I find this site useful for service bulletins and recalls:
https://www.carcomplaints.com/BMW/i3/

1jrod573
Posts: 6
Joined: Tue Apr 28, 2020 7:28 pm

Re: Rex problems

Thu Apr 30, 2020 8:06 pm

Thank you for your reply! The power steering thing was a one time fluke. I located the relay. I'll attempt to replace it asap. I took it out and cleaned it a bit to see if it works. I'll update you asap. Thank you so much!

1jrod573
Posts: 6
Joined: Tue Apr 28, 2020 7:28 pm

Re: Rex problems

Wed May 06, 2020 2:13 pm

I replaced the relay and I still get the error. I haven't had a chance to clear the cel after replacing the relay if that makes a difference? Out of desperation I cleaned around the fuel cap to see if that may help. Still getting the error.
Last edited by 1jrod573 on Wed May 06, 2020 2:39 pm, edited 1 time in total.

jadnashuanh
Posts: 5029
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Rex problems

Wed May 06, 2020 2:38 pm

The CEL, may not clear itself for awhile, depending on exactly what the fault was. It may take 3-4 power/driving cycles. A BMW specific OBD-II reader should be able to clear it, and if the problem is still there, it will just come back.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
Soon (hopefully!) A 2021 X5 45e will replace the above

1jrod573
Posts: 6
Joined: Tue Apr 28, 2020 7:28 pm

Re: Rex problems

Wed May 06, 2020 3:36 pm

Along with the error the rex won't hold state of charge. Although the last time it was driven the rex ran longer before the drivetrain error popped up and stopped the rex.

alohart
Posts: 2120
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Rex problems

Wed May 06, 2020 8:49 pm

Until you read the diagnostic trouble code (DTC) using an OBD-II code reader, you'd be just guessing about the reason for the problem. You'd need a code reader with BMW-specific software because so many of an i3's DTC's are proprietary due to the i3 REx's uniqueness.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

1jrod573
Posts: 6
Joined: Tue Apr 28, 2020 7:28 pm

Re: Rex problems

Thu May 07, 2020 6:25 am

Any suggestions on a good obd2 reader?

Return to “BMW i3 Rex Specific Discussions”