all the warning lights are on the dash and in petrol mode only when the throttle is held in one spot for a while at same speed 50 - 60 kph

Hello and welcome to ExpertHelp.com! My name is Relly De Jesus and I'm going to do everything in my power to answer your question to your full satisfaction!

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Hi Paul

How are you doing? As a first course of action, I strongly suggest that you remove the negative battery connector and let it sit for 10 minutes before reconnecting it. This will reset the system and can get rid of all the warning lights in your dash. Please let me know of the result. I'll be standing by for your response.

Thank you

Relly

Hello Paul

How are you doing? This is a follow up regarding my assistance. Is there anything else I can add or help you with? Let me know if it's been helpful and please keep me posted on the progress. I'll be waiting for your response.

Thank you

Relly

Hello Paul

Good to hear back from you, hope everything is good. Regarding the issue, it can be detecting some irregularities when you are cruising within 50 - 60klms. The probable cause can be a TPS (throttle position sensor), MAF (mass air flow) sensor, O2 (oxygen sensor), etc.. As a first course of action please try to remove the negative battery connector and let it sit for 5 minutes before reconnecting it. This will reset the system and observe if the problem will persist on 50 - 60kms/hr cruise.

If it's gone then it's good. If the problem persist, I strongly suggest that you have the engine scanned for fault codes. From there the problem will be determined and you will know the parts that needs replacement. This is the best thing to do to avoid guessing for it will narrow down the search for fault.

Hope this helps and please let me know if there's anything else I can add or help you with. I'll be standing by for your response.

Thank you

Relly

Hi Paul

How are you doing? Is there anything else I can add or help you with? I'll be standing by for your response.

Thank you

Relly

Hello Paul

How are you doing? This is a follow up regarding my assistance. Is there anything else I can add or help you with? Let me know if it's been helpful and please keep me posted on the progress. I'll be waiting for your response.

Thank you

Relly

If that's the case then go for the Hybrid battery replacement Paul. Is there anything else I can add or help you with?

Thank you

Relly

Dear Paul, It was a pleasure helping you with your LEXUS issue today. Here is a summary of the resolution.

Issue identified : Electronic failure
Solution Implemented : Advised to reset the system by the battery. Possible battery problem. Solution Accepted
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