Last Wednesday, I went to service my car (Executive Auto) for 80,000km. Prior to that, no abnormalities found and went for a normal service.

Last night, suddenly my 'Check Engine' indicator light up. But I didn't experience any uncommon feels about the car. Just drove as normal. The tachometer clocked around 200km after service.

Do I have to go back to the SC? What is the possible cause of the indicator?

hope it is no wrong engine oil used

It's best to return to the SC to have it checked. They have the cross reference to diagnose the error code, which can then pinpoint to the fault or its cause. It could be something as simple as a loose connector or a component/sensor to be failing soon.

Has any CFE owners here faced this problem before?

When the vehicle is moving along slowly (eg: 2-3 km/h) along a traffic jam situation with no stepping on the accelerator pedal, the indicator showing on the "INSTANT" (indicating the consumption of XX.XX litres/100km) will erratically fluctuate between 20 and 30 litres/100km.

Also, when put into reverse gear and when the vehicle starts to move (without stepping the accelerator), the "INSTANT" will also sometimes erratically show 99.99 litres/100km.

However, when traveling at normal speeds of between 90km/h and 100km/h, there is no more the erratic display.

I had just went to the SC, but the mechanic said he hasn't come across this problem before. He had snapped a photo of the meter panel showing the problem and he said he needs to check with HQ before getting back to me again.

I suspect it could be due to a faulty sensor on 1 of the wheels as it occurs only at low speeds.

This post has been edited by winners8: Apr 30 2016, 04:10 PM

my car have this also. if low rpm it's like driving a manual car. meaning the car revs high just to move slowly. so the INSTANT easily go 40l/100km above. i was wondering about this too. i thought it was just my car.

Isn't this normal? When you are too slow, the car is using much more fuel per 100KM.

If you can't take so much of fluctuation, then stick with Average display.

This post has been edited by mengsuan: May 1 2016, 12:07 AM

No, there is definitely something wrong. The engine rpm does not go up yet because I have not even stepped on the accelerator pedal. The vehicle starts to move slowly (on a level road) from its existing idling engine rpm. Also, when engaged into reverse gear, even without stepping on the accelerator (also on a level road) with the vehicle starting to move very slowly, the INSTANT will show 99.99L/100km for a brief moment. Previously, I've never encounter such situations before.

I do agree that the value of the INSTANT display will go up when the accelerator pedal is stepped on and the rpm increases. But in my case, even without an rpm increase, the INSTANT display will fluctuate as long as the vehicle will start to move (slowly). It is definitely not like this before. Even the mechanic, who test drove my car yesterday agreed that it is not normal. Otherwise, he would not have even bothered to take a photo of the meter panel to show to the PROTON HQ. He could just simply say: Biasa lah bang. Anyway, I'll wait for next week to see what's the feedback?

I suspect the following causes: faulty/dirty fuel sensor, wheel sensor (but I believe wheel sensor is only for the ABS) or PCB of meter panel faulty.

This post has been edited by winners8: May 1 2016, 07:38 AM

My car does that 99.9 display too. It doesn't need throttle to be stepped on to use that much fuel for a hundred KM. It is a measure of efficiency.

There is nothing that you can fix about the sensors for the estimated FC display.

The cluster gets info of speed and injector duty cycle from ABCM to display FC reading. Your speed sensors are definitely working otherwise there won't be speed showing on your cluster, and the CVT requires speed input to control valve body in it. Injector duty cycles are always being worked on by ECU. If wrong amount of fuel is injected, you'll have a stalled engine.

This post has been edited by mengsuan: May 1 2016, 10:34 AM

After considering what you've said above, I think you may be right, especially if yours is also showing the "99.9" display. Is it showing when the car will start to move after you engage into the reverse gear without stepping on the accelerator and only for a very brief moment? Appreciate if you can try on your car and revert again. Thanks. Anyway, I'll see what outcome they'll get back to me again. I'll be convinced if I could sit in another PREVE (driven by their own mechanic) and see if the phenomenon is the same.

This post has been edited by winners8: May 1 2016, 02:04 PM

Yes, my car shows 99.9L/100KM for a second or two maximum when the car is just creeping forward. To the car, FC very inefficient at that time as clutch is only half engaged, sizable amount of fuel is injected to keep the engine running but the car is like 1km/h.

Thanks for your reply, but honestly, I've never seen mine showing 99.9L/100km before yesterday. Also, theoretically, if the engine is not revved (ie: the rpm does not go up and hence no significant increase in the amount of fuel injected), there is no reason for the FC display to shoot up, especially when the car is just slowly creeping forward on its own engine idling speed.

Also, if I don't remember wrongly, lately, I've also noticed that the Auto Door Lock does not operate occasionally. I know this because previously, it is always necessary for the first door (to be opened) to be "pulled" twice before the door can be opened from the inside. But lately, on a few occasions, the door will open at the first "pull", hence, indicating that the doors were not automatically locked at the 20km/h speed. This happens intermittently. Maybe the ABCM is starting to behave abnormally or does it need to be reflashed/reprogrammed (if possible?).

This post has been edited by winners8: May 1 2016, 05:23 PM

That is one of the reasons I don't set the display to show "Instantaneous Fuel" readings as it serves little to no purpose to me. It is just a computer reading based on estimation. I always have the display showing the number of kilometres that are left before the fuel tank runs empty, as this is of higher importance to me than Instantaneous fuel figures. Whenever the kilometres drop to 200 km or below, I will proceed to the petrol station to have the fuel tank refilled.

I tried the Instantaneous readings much earlier when I got the car 2+ years ago and similarly the display showed 99 L / 100 km, something like that. I don't think it's the car's problem but rather the engineers that have configured the system or computer to display such readings. 99L/100km may not look reasonable, but Proton has configured the computer to show these kind of readings so there is not much users can do about it. My other car the Ford Focus shows more realistic figures at similar driving conditions ie. creeping from standstill - around 20L to 30+L higher figures if I"m not mistaken.

At times i also set the display showing the number of km left when driving. i wanna ask, do any of u ever experience when, let say, starting the car the display shows 127km left for example. then suddenly become 121km, but doesnt even travel far. is this normal?

I experience the same thing with the car, so I guess it is normal? An abrupt / quick change in the km where 127 km goes down to 121 km in less 1-2 minutes. I feel the computer settings of the Proton in all these figures (km left, instantaneous fuel etc.) are a bit inconsistent when compared to some other cars. The "km left" on the Preve can change rather drastically, even if your driving pattern is consistent ie. moderate driving all the time and not hard-moderate-hard-moderate driving. Sometimes the km goes down very fast, sometimes very slow irrespective of driving condition. I noticed that once you start the engine of the car and start driving, the first few km will be used up very fast. Whenever I drive out from my house to work, although I have traveled only say 2-3 km, the display would have dropped by say 10 km (130 km dropped to 120 km). Inconsistency. But after that, it will stabilize and go back to normal ie. the km left will not drop so rapidly.

As I have mentioned earlier, the settings in the numbers depend a lot on the engineers who configured how the numbers would look like. One aspect I found out about the computer setting in the Proton Preve Turbo is the engineers have set the km left with a FULL petrol tank to be on the high side. Say with a full tank of petrol, the display of the Proton Preve Turbo will show about 550 km, sometimes higher. However, for the Ford Focus, the display will show about 500 km to 520 km with a full tank. The Ford Focus' fuel tank capacity is 55 litres whereas the Preve Turbo's fuel tank capacity is 50 litres. Theoretically the Ford Focus' display should show a higher figure in the "km left" than the Proton Preve Turbo but it is the other way round, even when the fuel tank capacity of the Preve Turbo is lower than the Ford Focus. This observation suggests that the numbers depend a lot on how the engineers have tweaked the settings. All the numbers (km left, instantaneous fuel etc.) are all just a guesstimate, a rough indication. Some cars will show more accurate figures whilst some will show less accurate figures.

This post has been edited by SportyHandling: May 2 2016, 09:22 AM

The reading is only for estimation, I find it weird that instead of how many KMs possible being displayed, they should display how many liters left in the tank, this would be more user friendly as everyone's driving style is different.

All these displays are there because it has become "measurable" with the introduction of fuel injection and ECU implementation. Mainly also since the other manufacturers have them, so every maker will also try to include it into their higher end models where possible to give the "atas" look/feel.

I remember when it was the carburetor generation, there was also a vacuum tube connecting to an analogue (needle) indicator on the meter panel to "inform" the driver whether he was driving at "economy" mode or "power" mode.

Well, I can tell my other (Conti and Japs alike) cars are also displaying unreliable measurement. It all depends on how refined the system and the conditions of your driving is.

I have never trusted these readings, I much more rely on how much of the fuel left. I don't think Proton engineers are going to spend resources on fine tuning the system too, maybe for future Proton cars, it will be more reliable.

hi,

The headlamp light is really dim and not bright enough; Any one doing "improvise Relay Wire Harness" to your headlamp?
Any difference? what is the cost ?
Any accessories shop in puchong provide the service?

thanks..

This post has been edited by maan: May 4 2016, 10:06 AM

Have any of you guys encountered stalled engine
(preve CFE)
I start the car normally ( push 2 times, depress brake and start engine)
Everything turn on as usually , temp was good
I didnt rev or anything yet
But as i put into D gear
the car stalled with *Gear Indicator turn on*
Is it normal?

Guys,

I'm thinking to get early unit of preve (2012/2013), Do you guys think it's a good idea ?
Any recommendation about the used preve unit ?

Thanks