Problems with 2015 MKZ hybrid

[hcole125]

Hello all, I am making this post on the slim hope that someone else may have experienced a similar issue and may be able to offer any insight on what cause their issue. I recently purchased a 2015 MKZ Hybrid with 65k miles. I love the car so far but i am currently dealing with an a pretty major issue. It is currently at the lincoln dealership and they pretty much are just scratching their heads.

First occurrence of problem while fiance was driving:
1. car said pull over safely on dash while pulling up to a red light
2. once she pulled into the turn lane car shut off, orange gear icon also was illuminated
3. engine/start stop button was blinking
4. she said that she was unable to turn the car off.
5. she hopped on a call with me and we were able to get the car turned off and restarted she could pull off of the road.
6. car had no further dash lights and drove home fine.

second occurrence approximately 2 weeks later while friend was driving:
1. he started accelerating through an intersection
2. car lost power and brakes stopped working
3. dash said something along the lines of system failure and had another message for brakes
4. hazard lights would not turn on, car put itself into park as he got to the side of the road
5. he was able to restart the car and it drove the rest of the way fine

It has a large amount of DTCs in the car which I will list below, it appears that is losing control with a lot of modules in the car. Car is running and driving fine besides these 2 instances.

I do have forscan and I was able to pull the DTC that were stored.
SOBD p0613:86-28
SOBD P0887:00-28
BECM U3012:00-28
APIM U0121:00-08 (car was sync 3 swapped recently)
APIM U024B:00-0B (car was sync 3 swapped recently)
APIM U024C:00-0B (car was sync 3 swapped recently)
APIM U3000:41-0B (car was sync 3 swapped recently)
DCDC U0100:00-28
DCDC U0293:00-28
PAM U0100:00-28
PAM U0293:00-28
PAM U0121:00-28
PAM U0131:00-28
HCM B1D64:01-08
HCM B1D65:01-08
HCM U0100:00-08
HCM U0121:00-08
HCM U0401:00-0
BdyCM U3007:16-08
BdyCM U3013:16-08
BdyCM B124B:11-08
BdyCM B124A:11-08
BdyCM B115E:08-0A
BdyCM U0121:87-08
BdyCM U0131:87-08
BdyCM U0293:87-08
BdyCM B108A:24-08

 

[batchman]

No direct experience but sure sounds like a general communication failure. The first question routinely asked here, and frequently causal, is how old is your 12v battery? And I will add, what brand is it? These are not as robust as they used to be, but are usually relatively inexpensive and not that hard to change - a good place to start with any generalized electrical concern.

Best regards,
- Jeff

 

[hcole125]

No direct experience but sure sounds like a general communication failure. The first question routinely asked here, and frequently causal, is how old is your 12v battery? And I will add, what brand is it? These are not as robust as they used to be, but are usually relatively inexpensive and not that hard to change - a good place to start with any generalized electrical concern.

Best regards,
- Jeff

Thank you for the reply Jeff, this was both mine and the dealers initial thought. They said that they have tested it multiple times and it has passed everytime. It is dated 10/24 not sure what brand it is. I did notice in the pictures I had taken of forscan the high voltage battery was putting out 291 volts. And someone else had mentioned that’s on the lower end and it should be 250v-400v. Not sure if this would cause an issue.

-Hunter

 

[Action]

I know jack about Hybrids. Never owned one either.

There are a pile of U codes and B codes
With two P codes

Know that the B code is a body diagnostic code
The U code are unique
And the P code is a power train code.

If I were the tech, I would be going through each code for the meaning and relevance.

Typically with that many codes there is something related that will fix most of these. It may be a communication error were the issue is in the wiring. Or in a wiring harness somewhere. OR there is a problem with a common power lead in or ground point.

Another piece I would confirm is that all batteries are fully charged 100%.

Action