When Engine light (exhaust control light) come ON! Well, stumbled on this problem 2 months back, while driving to Ooty. Just after about 2-3hrs of drive from Bangalore, got a puncture and then little later this light came ON!
Called up Vinayaka, and below was the conversation:
Me: Have got this engine Check light ON, should I limp to ASS?
ASS: Is it Red light or amber?
Me: Amber
ASS: Open the bonnet, remove battery connection and put it back after 15 min, and call if the light is still ON
Me: ................ OK done, but light is still ON!
ASS: Can you rev engine and see if it can cross 5000rpm in neutral?
Me: Let me check.... Yes, it goes above 5000
ASS: So it is not a major problem, don't worry sir, have your trip, once you come back visit us.
Me: Should I limit the speed or engine rev?
ASS: Drive normally sir, there will be no issues, it is not a major problem.
OK done with ordeal, spent about 1 hour on the way figuring these out... Finally continued with the journey!
Returned from the trip, and visited Vinayaka, I was told there was some intermittent problem, may be due to dust or some thing, and error code has been cleared, there is no problem with the vehicle.
But at one corner of my mind it was not convincing enough.
Went for another long drive 2 weeks back, and again this time as soon as I crossed Tumkur, again this light came on!
This time didn't call ***, instead drove as usual, drove till goa and returned did about 2500kms.
Then the search for a VAG-COM started. bought one from ebay, but after studying its PCB, it seems like I requested for Audi/VW/Skoda CAN cable, but I got a Ford VAG-COM CAN cable! and thus wasted $30!
I was not convinced enough a $350 Ross-Tech HEX-CAN is worth investing, till I met a fellow BHPian today!!
So was exchanging PM with fellow BHPian androdev yesterday, and he had a HEX-CAN Ross-Tech cable! wow... and we both worked in same Tech Park!!
So decided to meet today itself. I met a fellow BHPian for the first time, and it was amazing... we both worked may be just few building away! I must say, Thanks Androdev....
So once we met in my car, connected the VAG-COM cable, and found 2 erros.
1st was engine error, and 2nd was related to central locking convenience.
Will find out more on 2nd error later, but first error is of more concern.
Error details below:
Address 01: Engine Labels: 03G-906-016-BKC.lbl
Part No SW: 03G 906 016 DJ HW: 028 101 188 3
Component: R4 1,9L EDC 0000SG 6250
Revision: 12345678 Serial number: SKZ7Z0H4880947
Coding: 0050071
Shop #: WSC 73430 790 00000
1 Fault Found:
16683 - Boost Pressure Regulation: Control Range Not Reached
P0299 - 000 - -
Freeze Frame:
RPM: 2478 /min
Torque: 188.0 Nm
Speed: 114.0 km/h
Load: 60.0 %
Voltage: 14.21 V
Bin. Bits: 11000000
Absolute Pres.: 2029.8 mbar
Absolute Pres.: 1315.8 mbar
Readiness: 1 1 0 0 0
So error code: 16683!
couple of details found on various other forums for reference and detailed reading at the end of this post. Summary of details I gathered from various forums:
- Boost Pressure Regulation is related to pressure built up by turbo charger.
- This could also result in loss of power ( though have not observed any in 1,2,3 gears, but 4th and 5th feel bit slower than before, could go above 120kph with lot full throttle and took really long may be few kms)!!
- This specific error code is for pressure not building up as expected.
- Possible reasons are:
1. loose hose pipe connections causing air leakage and hence pressure lost
2. turbo not working properly, due to clogging of carbon/oil
3. Boost pressure controller (sensor, I think is N75 or some thing), not functioning properly
4. Could be also due to leakage in the hose pipe.
May be this could lead from a simple hose pipe fixing to turbo replacement!
Will find out exactly what is wrong with my car on Fri, when I'll be visiting Vinayaka.
Then we went for a test drive, logging the boost pressure specified (or requested by ECU), and actual pressure built up. We both spent about an hour on the car going around, trying to find a good stretch to rev the engine better, at that time idea was to see if this error again pops up, but never it did!
In any case data collected was interesting! Then later, Androdev gave same data from his car. Below charts show the comparison.
In normal operation, Boost pressure actual will follow closely with the requested pressure above certain RPM (that is ~1500), till 1500rpm, Turbo is kind of iddle and pressure showed up to be around ~950mbar!
Pressure can go as high as ~2500mbar, depending on how engine is being revved.
Will keep the thread updated based on findings from ***, mean while attached is the comparison chart on Boost pressure between my car and Androdev's. |