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  1. Shree Patel
  2. CNG Kit, LPG Kit
  3. Tuesday, January 07 2020
I am having Hyundai Santro Sportz(August 2019 model) with company fitted CNG kit. Just bought the car a month ago. I am facing the issue of Malfunction Indicator Lamp(MIL) symbol. Even when this symbol is lighted the car does not run smoothly, it does not get proper pickup. Went to the service center nearly for 4-5 times to get remove the MIL symbol. Though it comes again and again. Can you help why the symbol is indicating again and again as it is just purchased a month ago.
I came to know that the issue does not occur in company fitted CNG kit, it only comes when you do CNG kit from outside.
But we are getting it in company fitted itself.

Please provide some help or any suggestions
Admin Accepted Answer
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Hello,

I suggest to write back to Hyundai
As this although can be a problem in after-market fitted CNG Kit with poor level fitment, but rarely heard in Factory Fitted Kits where entire tune up done towards compatibility of Kit

There can be one to multiple reasons, but for a plant fitted CNG Kit and in a 1 month old car - it seems like issue with either
> ECU
> or CNG Fitment process

Let them detail out about
> Problem
> Visits Done
> Confidence shown in product and Feeling about Reliability now
> Corrective One Time Action to prevent further issues

Hope should help !!


  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 1
Sumit Accepted Answer
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I have purchased the CNG fitted Santro only a month back and facing the same problem for the first time.
MIL function problem
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 2
sk tripathi Accepted Answer
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If you clean the mud/water on spark plug wires then this problem of MIL function will be resolved.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 3
NK Jain Accepted Answer
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Hi, I am facing the same for the same car (Company Fitted CNG Santro Sports Car) which I have purchased on 18/10/2020. I have already visited 3 times at the service centre but till yet not received a satisfactory solution.

Can anybody help to get the solution for permanent? I am completely fade up with this problem. Earlier I have used Alto CNG for 9 years till 120000 km but never faced this type of issue even a single time.

Hyundai brand is still struggling on the CNG model then how they will manage the electric car. Please beware to buy this brand especially in company fitted CNG.


  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 4
Abhinav Tyagi Accepted Answer
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Hi. I am also facing the same issue, did you fix your issue? What did the dealer say about it? Please do let me know
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 5
Shree Patel Accepted Answer
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Hi,

After visiting hyundai service center many times, i got my issue resolved.

This problem could not be resolved by any of the hyundai service center i visited, but in my case on requesting for cng specialist for hyundai they called a technician for solving this issue.
When the technician came for the very first time, he just anaylised the car and the occuring issue and the second time he changed my car's cng ECM unit and did the cng tune up again. At our time this part was not available to service center so the company gave an order of the same from the hyundai company.

So just keep in mind, no hyundai service workers will be able to solve this issue as at our time the hyundai service manager informed that they do not have sufficient knowledge for cng issues like this.

And finally, after solving the issue and driving for more than 10000+ kms didn't face any such issues again, it just vanished totally.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 6
Abhinav Tyagi Accepted Answer
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Hi Shree,
Thanks for your response.
Just wanted to know one more thing, did you continue to drive the car with the warning light? If yes then for how long? In my case the warning light is on for the past 3 days and I am not facing any issues.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 7
Vaibhav Accepted Answer
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I'm facing the same issue and I've been driving the car for months with the issue. Hyundai has some serious QC problems.
  1. more than a month ago
  2. CNG Kit, LPG Kit
  3. # 8
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