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nelson freitas
nelson freitas,
Category: Toyota
Satisfied Customers: 57
Experience:  AutomotiveTechnician at brantford toyota
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I got check engine light abs light brake light come on

Customer Question

i got check engine light abs light brake light come on engine doesnt restart i got u0129 code
JA: Does the light stay on, or does it blink?
Customer: yes stay in the dashboard
JA: What is the model/year of your Toyota?
Customer: 2010 prius
JA: Are you fixing your Prius yourself? What have you tried so far?
Customer: \yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: sometimes engine will start and shut off its misfiring
Submitted: 6 months ago.
Category: Toyota
Customer: replied 6 months ago.
yesterday i got ecm code it says ecm its not communicating and today i got p3000 and u0129 code but befor i got p0300 code
Customer: replied 6 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  Todd M replied 6 months ago.

Hello. My name is ***** ***** I will be assisting you today. First of we will get the p0300 code understood. this is just letting you know that the vehicle is misfiring due to spark plugs or coils, etc. The other two codes are you issue.

Expert:  Todd M replied 6 months ago.

The other two codes are letting you know the hybrid system is having issues communicating with the vehicle. The could be caused by bad connection of power, ground, or even a faulty sensor.

Expert:  Todd M replied 6 months ago.

Have you changed the spark plugs or coils lately?

Customer: replied 6 months ago.
hello
Expert:  Todd M replied 6 months ago.

Hello. How are you?

Expert:  Todd M replied 6 months ago.

The best advice that I can give you on this is to take the vehicle to a technician who has experience with Prius/Hybrid vehicles. If you are not experienced with working on hybrids(especially the electrical), not only can you damage the vehicle, but you can be hurt very seriously.

Expert:  Todd M replied 6 months ago.

The connection to the ECU will have to be checked and the CAN system will have to be serviced.

Expert:  Todd M replied 6 months ago.

Are you there?

Customer: replied 6 months ago.
maybe ecu is bad?
Customer: replied 6 months ago.
i thought you gonna help me
Customer: replied 6 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 6 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 6 months ago.
hello i need a certified mechanic
Customer: replied 6 months ago.
pls reply
Expert:  Pedro Goncalves replied 6 months ago.

Hi,

My name is ***** ***** I'm a Master/Hybrid Toyota Technician,

Please inform me of all the codes currently present, please and thank you

Customer: replied 6 months ago.
I got p3000 and u0129
Customer: replied 6 months ago.
But before that give me a p0300
Expert:  Pedro Goncalves replied 6 months ago.

2010 Prius?

Customer: replied 6 months ago.
Engine is misfire
Customer: replied 6 months ago.
Pls call me
Customer: replied 6 months ago.
last day I got code it says Ecmc /Pcm not communicating
Customer: replied 6 months ago.
I already pay
Customer: replied 6 months ago.
Why you charge me again
Expert:  Pedro Goncalves replied 6 months ago.

Did you speak with anybody?

Customer: replied 6 months ago.
No
Customer: replied 6 months ago.
2010 Prius
Customer: replied 6 months ago.
You think it's a bad ecm or pcm?
Customer: replied 6 months ago.
Pls reply
Expert:  Pedro Goncalves replied 6 months ago.

Then you haven't paid for the phone call.

Phone call is considered a premium service

Expert:  Pedro Goncalves replied 6 months ago.

No I don't. It's rare for the ECM to go bad

Customer: replied 6 months ago.
I paid yesterday twice and nobdy called me only today
Customer: replied 6 months ago.
Why I got Ecm code?it says it's not communicating
Customer: replied 6 months ago.
Engine knocking and shut down and doesn't start
Expert:  Pedro Goncalves replied 6 months ago.

that's normal. when there's a misfire

Customer: replied 6 months ago.
If you are a certified Toyota technician you know what's wrong with tha car
Expert:  Pedro Goncalves replied 6 months ago.

unfortunately it's not that easy. There's a lot of things to consider. Although you can read the codes but the hybrid system has a 7 code system

Customer: replied 6 months ago.
I change 5 modules of hybrid battery already
Customer: replied 6 months ago.
I got 7.2 volts some of them
Customer: replied 6 months ago.
U think bad spark plugs?
Customer: replied 6 months ago.
I take out all the plugs look bad
Expert:  Pedro Goncalves replied 6 months ago.

there's possible a bulletin for your car

Customer: replied 6 months ago.
What
Customer: replied 6 months ago.
What bulletin
Expert:  Pedro Goncalves replied 6 months ago.

I'm researching but I would like to know what are you looking for?

Are you going to attempt to fix it yourself? Do you just want the possible thing that can be wrong with the vehicle?

Customer: replied 6 months ago.
I'm already fixing it
Customer: replied 6 months ago.
What's wrong with the car
Expert:  Pedro Goncalves replied 6 months ago.

sir. Understand that this isn't a straight up answer.

Expert:  Pedro Goncalves replied 6 months ago.

There s multiple reasons for the misfire.

Customer: replied 6 months ago.
Ok give me that
Expert:  Pedro Goncalves replied 6 months ago.

Nobody will be able to tell you what the problem is. We can only tell you the most common issues

Customer: replied 6 months ago.
I already clean the egr
Expert:  Pedro Goncalves replied 6 months ago.

Spark plug, Coils, Injector Purge,

Customer: replied 6 months ago.
What is coils?
Customer: replied 6 months ago.
What is injector purge?
Customer: replied 6 months ago.
In the fuel injector?
Expert:  Pedro Goncalves replied 6 months ago.

Throttle body service

remove the throttle body and see if there's dirty water inside the intake manifold

Customer: replied 6 months ago.
I already remove and clean it
Expert:  Pedro Goncalves replied 6 months ago.

Coil are black/gray and go on top of the spark plugs

Customer: replied 6 months ago.
The big black thing connected to egr
Customer: replied 6 months ago.
The long rubber connected to the plug?
Customer: replied 6 months ago.
I need to change the spark plugs?looks bad all of them
Customer: replied 6 months ago.
Why the window controller the light it's blinking looks like there's a shortage power
Customer: replied 6 months ago.
Or ground
Customer: replied 6 months ago.
I got new 12 volt battery
Customer: replied 6 months ago.
Sometime engine start and shut down like a low power
Customer: replied 6 months ago.
Ang sometimes knocking and shut down some times doesn't turn on
Customer: replied 6 months ago.
Hello
Customer: replied 6 months ago.
Where are u
Customer: replied 6 months ago.
i want a new Hybrid Toyota Expert, please.
Expert:  nelson freitas replied 6 months ago.
Hello,My name is Nelson, I have been an automotive technician for over 12 years. And I am currently working at a Toyota dealership. I'ld like to help you with your problem but first I will need some information from you to help clarify the problem.From what I have read you first had the check engine light on with the U0129 code; then the P0300 appeared afterwards?Also what have you inspected and/or replaced on the vehicle since then?Hope to hear from you soon,
Nelson
Customer: replied 6 months ago.
Hello
Customer: replied 6 months ago.
Are u there
Expert:  nelson freitas replied 6 months ago.
I am, but I m also at work. I may not get to respond immediately but I will as soon as I can.I'ld like to help but I will need you to anewer the 2 questions I asked above so that I might better understand the problem
Customer: replied 6 months ago.
I got two codes p3000 and u0129
Customer: replied 6 months ago.
Can you help me for that?
Customer: replied 6 months ago.
What is the problem of the car?
Customer: replied 6 months ago.
Pls reply
Expert:  nelson freitas replied 6 months ago.
In order to help you find the problem i will need to confirm some information first.You menu one the U0129 appeared first. And the the p0300 came afterwards. How long did it take for the P0300 to set. And did you do anything in between the codes?
Customer: replied 6 months ago.
No I delete that code po300 and some of them say po2 sensor camshaft something like that but I delete all of them and now ni got two new code uo129 and p3000
Customer: replied 6 months ago.
Engine knocking and shut down and doesn't start
Customer: replied 6 months ago.
I replace 10 pcs hybrid battery already
Expert:  nelson freitas replied 6 months ago.
Ok, which battery did you replace the small 12v battery or the large hybrid battery? and why?
Expert:  nelson freitas replied 6 months ago.
what do you mean by 10 pcs?
Customer: replied 6 months ago.
the 12 volts and 10 pcs hybrid battery coz it's only 6.3 volts
Customer: replied 6 months ago.
I clean the egr and already
Customer: replied 6 months ago.
But the spark plugs looks bad I take all of them off and put it back
Customer: replied 6 months ago.
Why on my window controller all the lights are blinking look like I got short circuit in the car
Customer: replied 6 months ago.
The modules hybrid
Expert:  nelson freitas replied 6 months ago.
Ok. Can you think of anything that happend before all of this?Also if the plugs look bad I think you should replace those.How many km are on the prius, and has it been well maintained?
Customer: replied 6 months ago.
159,716. Miles
Expert:  nelson freitas replied 6 months ago.
Also ild like to confirm.
You took the hybridge battery apart and replaced the individual cells?
Customer: replied 6 months ago.
bad only 10 pcs bad cell. I replaced
Customer: replied 6 months ago.
The car is running and shut down suddenly and engine light comes on bad I check my 12 volt battery is only 9volt at the time is dying
Customer: replied 6 months ago.
I replace it but still the same
Expert:  nelson freitas replied 6 months ago.
Ok. And now the only 2 code are. The U0129 and P0300
Customer: replied 6 months ago.
I got two codes u0129 and p3000
Expert:  nelson freitas replied 6 months ago.
Ok. The code U0129 is indicating that there is a communication problem between modules. Now this could be caused by one of the modules or possibly a wire in between the modules.I would suggest that you take the prius to a Toyota dealership where they can scan all of the modules for codes with thier scan tool and that will be able to help them find the problem.The problem with aftermarket scan tools is that they will only scan the engine ECM, but not all of the others that are in the vehicle.
Expert:  nelson freitas replied 6 months ago.
I also suggest that when you do take it there you let them know of every thing that you have done so that they are aware what has been done and what has been replaced.
Customer: replied 6 months ago.
You don't know?whats wrong?
Customer: replied 6 months ago.
It's not Ecm problem?last day I got ecm code it says Ecm it's not communicating
Expert:  nelson freitas replied 6 months ago.
No I don't know what is wrong with the vehicle. There is no way of knowing what is causing this code to appear without a Toyota scan tool and some time diagnosing the vehicle.As I mentioned there will be many more codes stored in other modules that you can not access without a more advanced scab tool. And I would rather have you spend some money having a Toyota technician properly diagnose the problem; then spend more time and money replacing more parts that do not need to be replaced
Expert:  nelson freitas replied 6 months ago.

Hello,

I was wondering if you were able to get any more information or diagnostic codes from any other modules?

Nelson

Customer: replied 6 months ago.
No
Customer: replied 6 months ago.
Only p3000
Expert:  nelson freitas replied 6 months ago.

ok do you still have the U0129 code as well? Have you replaced the spark plugs that mentioned did not look too good?

Customer: replied 6 months ago.
No only p3000
Customer: replied 6 months ago.
I take off the contactor from hybrid battery and I will replace it including the 3 relay
Customer: replied 6 months ago.
I will know it tomorrow if the car will start
Customer: replied 6 months ago.
I replace the plugs
Expert:  nelson freitas replied 6 months ago.

ok, let me know how it goes afterwards.

Nelson

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