Proton Wira Check Engine Light

wira with mmc ecu or siemens ecu? If siemens ecu have troubleshoot according to obd scan...

If mmc probably the maf sensor near air filter was dirty...open it and remove from car,then spray and clean using electronic contact cleaner..

 

Can you find out what exactly the fault code is? I suspect it may have to do with either the air flow sensor, throttle position sensor or throttle body. A low pressure fuel pump or leak within the fuel system can also cause the engine to stall.

 

looks like air flow sensor....try using another unit from a fren 1st....

 

Hello, new people here. I was googling about Proton CEL and suddenly this thread comes up, hence my comment here. So cvkit17, you're not alone in this :wavey:

I've encountered this matter too several times. My ride is Wira SE(05). My car had the exact problem like yours. First visit to the mechanic after it happened, they said there are two problems; the MAP sensor & the total body. Since the total body was quite expensive (RM500+), I decided to only change the MAP sensor(the sensor was broken liao) and get the TB cleaned. A week after that, same thing happened again :stupid: I went to another mechanic, got the car diagnosed and he said the TB problem dy. So, no choice for me, I had to get it replaced. And they also reset the ECU settings of my car. But just two days after that, it happened again, I got furious liao and straight away went back to the 2nd workshop with the CEL still illuminating. They straight away plug the computer in, but no errors were detected. So they didn't do anything. It didn't happened anymore after that for 2/3 weeks. But just yesterday, while I was firing the engine up, it happened again. I'm so clueless on what the real problem is.:hmmmm2: one thing I notice is that when it happens, the engine is suddenly underpower. My RPM is like less than half of 1K.

Anyone can actually give an idea on what is really causing it? Thank you

 

try check crank sensor....


that was really problematic child because the wire sometimes pinned between timingbelt cover and damaged.....

 

how sure are u that the new TB u bought is brand new & not recond unit?
super90 ah?

 

and one more thing....


the o2 sensor at exhaust also need to be checked

 

Yeah, if you did get the true solution of this problem, do share here okay bro yeah, seems like TB doesn't solve the whole thing. I got mine changed as well, & I'm sure its a new one, but still that CEL light goes on, hmmm. There is one time I was cruising at 110km/h then suddenly the CEL came on & my engine doesn't respond to the throttle. Luckily I managed to safely stop at the side of the road.

The mechanic checked my crank sensor as well last time, but he said that's not the problem. I'm suspecting the O2 sensor at the exhaust as suggested by the others here.

Do give the results back okay bro

 

Just giving my opinion through experience....

I can be wrong bcos im using a totally different car, not Proton Wira...

2 items you can consider checking...

First the exhaust sensor..
In the case of my car the CEL light appear when the exhaust sensor is faulty..

Secondly...
Please check the engine oil pump....
If its not working properly, the CEL light may also appear.

Hope my opinion can be helpful...

 

My experience on crank sensor svdo satria..
the symptom:
1. Hard to start the car, need few times crank..
2. change starter, battery but still hard to start..
3. driving highway above 90km/h, the check engine light will light up but the car no problem still can drive..

 

Hmmm, same as what happened to me. There is no problem or faulty code detected. But still my sense is strong saying its the O2 sensor, sigh but if that's the problem, it should appear as a faulty code during the diagnose. Or it can be checked just by looking at it? No right?

 

dammm... been helping our friends here while my car also giving CEL problem.....

since mine was 1.6 xli (A) with MMC ecu..for sure no OBD port... been changing the MAF sensor and still intermittenly popped out.....

would check tps sensor next and probably the distributor as well.....

and perhaps flushing my ATF since 1.6/1.8 proton auto got TCU (transmission control unit as well) :hmmmm:


p/s: mine was stock engine with stock airbox (modded with CAI funnel)..replaced petrol filter and air filter as well

 

Damn, the thing happened again, twice just in the space of 5 hours. Really need to go to the workshop and get this thing settled once and for all. The car seems very underpower when the thing happens. And the jerking when the RPM hits 2K is just damn annoying.