Hydrid battery failed at service

[Charli Alder]

Hello fellow UX owners.

My 70 plate 4 year old UX with 16,000 miles had its 4 year  service today. Unfortunately the hybrid Battery check threw up the following.

"Diagnostic Trouble Code DTC code P30000 Hydrid battery/EV Battery Discharge Control Malfunction". 

So check failed. Unfortunately I did not check the paperwork when I picked up the car and the service centre did not say there was a problem. The dealership is closed now but I will go to them tomorrow.

I was wondering what the fault is and implications for repair and cost. Assuming Lexus do not cover it under their annual service warranty scheme.

Any help you can give me would be much appreciated.

 

[fourbanks]

It is covered under warranty Adrian 

[wharfhouse]

10 minutes ago, Charli Alder said:

Hello fellow UX owners.

My 70 plate 4 year old UX with 16,000 miles had its 4 year  service today. Unfortunately the hybrid battery check threw up the following.

"Diagnostic Trouble Code DTC code P30000 Hydrid battery/EV Battery Discharge Control Malfunction". 

So check failed. Unfortunately I did not check the paperwork when I picked up the car and the service centre did not say there was a problem. The dealership is closed now but I will go to them tomorrow.

I was wondering what the fault is and implications for repair and cost. Assuming Lexus do not cover it under their annual service warranty scheme.

Any help you can give me would be much appreciated.

 

If the hybrid health check (or a service at Lexus) was carried out within 12 months / 10k miles of a previous hybrid health check them the hybrid Battery will be covered under warranty. What I can't understand is why they didn't discuss this with you when you collected the car? 

[wharfhouse]

A quick Google search brings up:

P3000 Code (Battery Control System Malfunction)
Possible symptoms of the P3000 code may include:
Engine light and triangle light on

Common causes may include:
HV Control system
Low fuel supply
HV Battery assembly

Description:
Based on the malfunction signal obtained from the Battery Electronic Control Unit (ECU), the system alerts the driver.

The DTC is output when the state of charge (SOC) of the HV Battery decreases as a result of running out of gas, leaving the car in the N position, or a malfunction in the HV Control System.

[wharfhouse]

And this - in which case it may not be anything to worry about and could be an old code that was stored:

If the vehicle is left with neutral (N) selected (parked or stopped) for a long time, the Battery cannot be charged. In this case, the SOC may drop below the lower limit and DTC P300000 may be stored. (This is not a system malfunction.)

When the engine cannot be started, DTC P300000 may be stored because the HV Battery cannot be charged.

Repeated engine start checks may cause the SOC to drop, resulting in DTC P300000 being stored. In this case, charge the HV Battery using the THS charger.

Cranking the engine once causes the SOC to drop approximately 1%.

Charging the HV Battery once (10 minutes) using the THS charger restores the SOC approximately 2%.

Charging the HV Battery using the THS charger takes approximately 10 minutes when the Battery temperature is 25°C (77°F) or approximately 30 minutes when the Battery temperature is 0°C (32°F).

The THS charger is a supplemental charging device that enables the hybrid system to start (READY-on state).

If the result of this inspection is to charge the HV Battery, clear the DTCs and then charge the HV Battery using the THS charger. 

[Charli Alder]

Thank you all for your replies very much appreciated. I will say that the car has never refused to start, has never thrown up any error codes and the charging bars on the dash move up and down as usual. Hence my suprise at the failed check. Will keep you posted and once again thanks for your replies. Have a good weekend.

[Charli Alder]

Well seems the fault with the hybrid system might be due to my own stupidly as follows.

1. Driving the car with the boot hatch open. The hybrid system went berserk until I stopped and closed it otherwise the hybrid system would stop the car. I was obviously having a bad day. Car was ok after that.

2. I now have a disc lock. Put it on first time no problem. I must have move the steering wheel because next day when I went to take the DL off the hybrid system was not happy and insisted I move the steering wheel slightly. Interesting that. 

So apologies for being a stupid UX owner. Spoke with the service department of Lexus Stockport who apologised for not letting me know about the problem at time of pick. They said to monitor car over the next 500 miles to ensure all is ok, then they will remove the error codes and test the hybrid system.

I will keep you posted.

 

[wharfhouse]

1 hour ago, Charli Alder said:

Well seems the fault with the hybrid system might be due to my own stupidly as follows.

1. Driving the car with the boot hatch open. The hybrid system went berserk until I stopped and closed it otherwise the hybrid system would stop the car. I was obviously having a bad day. Car was ok after that.

2. I now have a disc lock. Put it on first time no problem. I must have move the steering wheel because next day when I went to take the DL off the hybrid system was not happy and insisted I move the steering wheel slightly. Interesting that. 

So apologies for being a stupid UX owner. Spoke with the service department of Lexus Stockport who apologised for not letting me know about the problem at time of pick. They said to monitor car over the next 500 miles to ensure all is ok, then they will remove the error codes and test the hybrid system.

I will keep you posted.

 

Good to find out it wasn't anything wrong as such - interesting it have those faults. The hybrid system is generally very reliable. 

[RONNIE W HODGEKINSON]

49 minutes ago, wharfhouse said:

Good to find out it wasn't anything wrong as such - interesting it have those faults. The hybrid system is generally very reliable. 

Could Possibly be Something as Simple as a Sensor Working Overtime here..Unusual To Have A Fault Code Of This Nature Showing On A Car Of This Age ..Would be interesting to see if this Code Disappears After a Long Run...!!!

[ALAW]

Glad its now ok for ya. The dealer failed not letting you know in my opinion.

[PCM]

On 8/18/2024 at 8:15 AM, Charli Alder said:

Well seems the fault with the hybrid system might be due to my own stupidly as follows.

.....

I will keep you posted.

 

And it's all ok now? 

Hopefully yes.

[microgerry]

Today we had our 250h serviced and it failed the hybrid system check. Dealer said it was an issue with the 12v Battery, but nothing to worry about. He said to return after 500 miles for another check and reset. 

Hopefully all will be ok then

[Notamech]

11 hours ago, microgerry said:

Today we had our 250h serviced and it failed the hybrid system check. Dealer said it was an issue with the 12v battery, but nothing to worry about. He said to return after 500 miles for another check and reset. 

Hopefully all will be ok then

Yes this is common. I was asked to do the same on my IS a couple of years ago. Basically the computer must have at least 500 miles worth of data for the hybrid health check to run successfully after a flat Battery or if codes have been erased. This is because some faults are intermittent and Lexus thinks 500 miles is sufficient for a car to have experienced all different types of driving conditions for even an intermittent fault to be logged again. Also this helps prevent fraud e.g people deliberately erasing codes before the hybrid health check and then later claiming warranty.