Tata Nano: Technical Issues & Discussions

[Pharaoh]

Re: Tata Nano – To Its Best

Ask them to connect your car to OBD and run a scan. It will show the reason why light is on. Additionally check if alternator belt is ok.

Hi, thanks for your feedback. I asked TASC person to do exactly the same. I got feedback from him that OBD is showing following error code, "P0324" & it's related to "Engine Knock Sensor Error" .
I crossed checked this in OBD error codes database & his description is correct for P0324 error code.
Now there is twist in a tale. Engine of my car was made on 30-Apr-14 & he said at that time knock sensors were not provided on Nano.
So accordingly my Nano doesn't have Knock Sensor neither provision to mount it (on engine block). But surprisingly the car is assembled (wrongly) with wiring harness that has terminal & socket to connect Knock Sensor.
So ECU is detecting that terminal as open circuit & flashing "Check Engine Light" alarm.
Now car is taken to TML regional service center (bigger service center) where TML CSM (Customer Support Manager) will be doing further investigation.
This all info. is as updated to me by TASC person.
Has anybody here has faced such issue earlier? Keeping my fingers crossed for what will happen next. Hoping to see my car fully fit & back to me soon.

 

[saishibu38380]

Re: Tata Nano – To Its Best

Hi, thanks for your feedback. I asked TASC person to do exactly the same. I got feedback from him that OBD is showing following error code, "P0324" & it's related to "Engine Knock Sensor Error" .
I crossed checked this in OBD error codes database & his description is correct for P0324 error code.
Now there is twist in a tale. Engine of my car was made on 30-Apr-14 & he said at that time knock sensors were not provided on Nano.
So accordingly my Nano doesn't have Knock Sensor neither provision to mount it (on engine block). But surprisingly the car is assembled (wrongly) with wiring harness that has terminal & socket to connect Knock Sensor.
So ECU is detecting that terminal as open circuit & flashing "Check Engine Light" alarm.
Now car is taken to TML regional service center (bigger service center) where TML CSM (Customer Support Manager) will be doing further investigation.
This all info. is as updated to me by TASC person.
Has anybody here has faced such issue earlier? Keeping my fingers crossed for what will happen next. Hoping to see my car fully fit & back to me soon.

what?? engine made in April 2014? how is that possible?

 

[Mr.Boss]

Re: Tata Nano – To Its Best

what?? engine made in April 2014? how is that possible?

May be a Typo. I suppose it is Apr'11/12

 

[Pharaoh]

Re: Tata Nano – To Its Best

what?? engine made in April 2014? how is that possible?

Sorry, my mistake. Its 30-Apr-2012 manufactured engine.

 

[CRACING]

Re: Tata Nano – To Its Best

So accordingly my Nano doesn't have Knock Sensor neither provision to mount it (on engine block). But surprisingly the car is assembled (wrongly) with wiring harness that has terminal & socket to connect Knock Sensor.
So ECU is detecting that terminal as open circuit & flashing "Check Engine Light" alarm.

Hello,

That looks a funny thing. Did you faced such trouble before? if not then how suddenly it came now?

If the nano doesn't have Knock Sensor then why there are harness for it or Knock Sensor in the ECU? How can the factory do this!

I doubt about service center, They might have done something wrong to your vehicle. Either they removed the Sensor or did something with the ECU (i.e updating to a software which has Knock Sensor enabled but no physical sensor to work) which may be the cause.

I too had suffered with the ASS badly when I had Nano. Usually when we turn the key to ON position, there will be some kind of sound in background for a few sec or a minute but after three years, the sound kept on forever. I said ASS to check the cause of the issue. After keeping my car for two days, they solved the issue but broken some battery related things. That is, battery wasn't charging.

They kept my car for another 2 days but didn't understood the issue, instead charged the battery fully and gave the car to me. Again after few starts, the battery got discharged and I had to suck in mid road with my mom. When I called them, they advised me to buy a new battery saying battery life is 3-4 years but I denied because battery was perfect (After all the issue started after giving the car to them, before I had no troubles with the battery) and started investigating myself.

The cause of the issue was blown fuse that charges the battery when the engine is on. They didn't understood this simple thing even after keeping my car for 2 days. Then I took the car again to them and they fixed the issue. Later for 6 months, I had still suffered issues with starting the engine (i.e delayed start, sucking on road, bad words from people) so I decided to sell the vehicle. I have no idea about how TASS is in other cities but in my city, they will surely kill the vehicle, let you suffer and end up with a word "No Idea Sir". They are good for nothing, even car wash!.

Thanks...
Best Regards

 

[Pharaoh]

Re: Tata Nano – To Its Best

Hello,

That looks a funny thing. Did you faced such trouble before? if not then how suddenly it came now?

If the nano doesn't have Knock Sensor then why there are harness for it or Knock Sensor in the ECU? How can the factory do this!


Best Regards

Thanks for your reply. The car has this problem from day 1. Only thing it wasn't pursued firmly with TASC as it is being done now. Actually it seams I am in for very unpleasant consequences. Let me explain you how. TASC told me that my car doesn't have provision to mount Knock sensor but the wiring harness has Knock sensor terminal. As per TASC knock sensor was implemented much later than Apr-12 so they are surprise to see wiring harness with Knock sensor terminal for Apr-12 engine of my car.

BUT situation is actually different. I did some internet searching. I will try to explain as simple as I can. Here we go.

In a ideal scenario, Having knock sensor in a car means following,
1. Having provision to mount knock sensor on Cylinder Block (this provision is drilled & tapped hole to fix knock sensor at top of the liner bore from outside).
2. Having knock sensor (of course) at provided location on cylinder block; as mentioned above.
3. Having wiring harness with terminal to connect knock sensor.
4. Having ECU calibrated to take input from Knock sensor (about knocking symptoms) & accordingly optimize fuel injection quantity & ignition timings.

As per my internet research, knock sensors are implemented in Dec-11 by TATA Motors for all 2012 models. The reason being higher compression ratio of 2012 models as compared to 2011. So my car actually should have knock sensor; which is missing. In fact if TASC is to believed, my car's cylinder block doesn't have provision to mount knock sensor.

What does it mean, I am having 2012 car with 2011 cylinder block???

I am literally irritated. I called up CSM last evening & shared with his these details. Asked him for confirmation for defect. But he was tight lipped. He kept saying, "Sir, we can't comment anything now. We can only say it's a critical issue & we will update you after detailed diagnosis". I told him that diagnosis is front of you & it's time to conclude. But he remained tight lipped.

Things are going from bad to worst.

 

[saishibu38380]

Re: Tata Nano – To Its Best

May be your previous owner must have changed the wiring harness die to rat bite?

 

[sureshsocial2012]

Re: Tata Nano – To Its Best

Hi All, I want to change my NANO's sound. Is there any component that can fit into silencer so that, I can reduce sound of the car. At present I have no issues with the car's silencer sound. But, Just want to know if any... Thanks..

 

[Mr.Boss]

Re: Tata Nano – To Its Best

Hi All, I want to change my NANO's sound. Is there any component that can fit into silencer so that, I can reduce sound of the car. At present I have no issues with the car's silencer sound. But, Just want to know if any... Thanks..

Why fix something that isn't broken?
There are lot of options to increase the sound, but to reduce, bit difficult.

 

[Pharaoh]

Re: Tata Nano – To Its Best

TASC told me that my car doesn't have provision to mount Knock sensor but the wiring harness has Knock sensor terminal. As per TASC knock sensor was implemented much later than Apr-12 so they are surprise to see wiring harness with Knock sensor terminal for Apr-12 engine of my car.

BUT situation is actually different. I did some internet searching. I will try to explain as simple as I can. Here we go.

In a ideal scenario, Having knock sensor in a car means following,
1. Having provision to mount knock sensor on Cylinder Block (this provision is drilled & tapped hole to fix knock sensor at top of the liner bore from outside).
2. Having knock sensor (of course) at provided location on cylinder block; as mentioned above.
3. Having wiring harness with terminal to connect knock sensor.
4. Having ECU calibrated to take input from Knock sensor (about knocking symptoms) & accordingly optimize fuel injection quantity & ignition timings.

As per my internet research, knock sensors are implemented in Dec-11 by TATA Motors for all 2012 models. The reason being higher compression ratio of 2012 models as compared to 2011. So my car actually should have knock sensor; which is missing. In fact if TASC is to believed, my car's cylinder block doesn't have provision to mount knock sensor.

What does it mean, I am having 2012 car with 2011 cylinder block???

Things are going from bad to worst.

Hi All,

The issue is cracked; not resolved. I have got shock of my life. I had bought this car second hand from local resale car Dealer. My 2012 Tata Nano has 2011 engine. Actual Engine no. doesn't match to engine no. mentioned on RC book. Dealer had changed the engine of this car, for the reasons best known to him. Dealer is trying to be innocent now, saying that it has probably been done by the mechanic when he sent the car for repair & he was ignorant of this engine swap.

The car however is running fine. To reconfirm, yesterday I checked highway mileage. I go 23 kmpl (with AC, sedate driving at 50-60 kmph) & 25 kmpl (without ac sedate driving at 50-60 kmph). This figure were checked during highway drive of 300 km. I will be checking city mileage in next couple of day.

As the car is running well, I plan to keep the car. But I have following questions for the experts,

1. I want to understand legal implications of this issue (unauthorised engine swap).
2. Are mileage figures are OK??
3. Are there any other issues I should check for???

 

[anshuman8]

Re: Tata Nano – To Its Best

1. I want to understand legal implications of this issue (unauthorised engine swap).
2. Are mileage figures are OK??
3. Are there any other issues I should check for???

The FE figures are good as in highway you can expect anything between 22-25 kmpl. People have reported more than that also. For your safety do not cross 60-80 kmph range in highways.

The engine/engine block swap is very astonishing. If dealer is fooling you check with the mechanic and try to find the details of the issue.

Does the engine no in RC and actual ones match ? If not your are in trouble for insurance claim at least.

 

[Pharaoh]

Re: Tata Nano – To Its Best

The FE figures are good as in highway you can expect anything between 22-25 kmpl. People have reported more than that also. For your safety do not cross 60-80 kmph range in highways.

The engine/engine block swap is very astonishing. If dealer is fooling you check with the mechanic and try to find the details of the issue.

Does the engine no in RC and actual ones match ? If not your are in trouble for insurance claim at least.

Thanks anshuman8 for your reply. Engine no. on RC book & actual engine no. do not match. I have verified both the numbers myself by putting car on the ramp in service station. The dealer (second had car dealer who sold me car) has acknowledged the engine swap issue. Only thing is he is pretending that he was ignorant of the issue when he sold the car to me.

I am getting a feeling that mileage figures I have got are Pre-2012 engine figures. The 2012 & thereafter engines return better mileage. Moreover in city traffic car returns mileage on 16-18 with AC; which again couple of kmpl less than post 2012 Nanos. Correct me if I am wrong.

One more thing, as RC book engine no. & actual engine no. do not match then I feel the car is actually "not legal" as per pure legal terms. Please clarify.

I had bought this car for my sister, who is student & will mostly use vehicle in city for going to collage. Now I am not very comfortable in giving her a car which has above issues. I am in process of evaluating all facts & figures before I take any decision.

 

[CRACING]

Re: Tata Nano – To Its Best

One more thing, as RC book engine no. & actual engine no. do not match then I feel the car is actually "not legal" as per pure legal terms. Please clarify.

100%. Its like using a car without licence or papers or keeping a g u n without licence. In case of accident, you will suffer more. Not making you nervous but Be careful.

I would highly advice to get rid of it asap! Give back to that damn used car dealer and get refund. No matter if you lose some bucks.

 

[lessgraviy]

I bought a 2012 Nano lx today and read in the manual that there is a power socket. When i checked the car there is a place for it but it has a cap and i cant seem to remove it.

So, does it really have a socket or is it just a provision to install one ? If yes how do i remove the cover

 

[venkat_CRDI]

I bought a 2012 Nano lx today and read in the manual that there is a power socket. When i checked the car there is a place for it but it has a cap and i cant seem to remove it.

So, does it really have a socket or is it just a provision to install one ? If yes how do i remove the cover

Its just a provision through which a socket can be installed. Its a 10 min job and can be done by any local accessory shop.