#1: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Tue May 08, 2012 4:02 pm ---- Hey guys
So some of you will no that I have been having problems with my eml light.
As of last post I had the post cat sensor extended with a mil eliminator fitted. This eliminator is meant to change the signal to be within an acceptable range for the ecu. However this did not work
Since then I have replaced the sensor with a new one and kept it intact no lengthening or elimators fitted. I have left it out of the exhaust and put it into a anodised heat sleeve so it is protected and can read the air in the engine bay not the exhaust. This would obviously mean a cleaner reading.
Even with doing this I still get the eml light with a P0138 code ( positive short circuit on o2 sensor)
So Could it now be something so simple as a fuse? Where is the fuse for the o2 sensors located? The engine in question is the et3 1.4 16v vvt.
Any help would be great I need to get this light sorted once and for all
Quick replies appriciated
Dan Last edited by Danw_VVT on Wed May 09, 2012 1:06 am; edited 1 time in total
#2: Re: Few elec questions Author: V9977, Location: Athens, GreecePosted: Tue May 08, 2012 4:15 pm ---- If the code is right, one of the wires (+ve ) is shorting to earth.
Should be a simple fix, unless the (dummy) sensor has had it.
#3: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Tue May 08, 2012 4:18 pm ---- Sensor is brand new today so can't beleive it could be the wiring on that?
#4: Re: Few elec questions Author: Seabook, Posted: Tue May 08, 2012 4:18 pm ---- hmm.....
you sure about the fault code reading?
i though P0500 is Vehicle Speed Sensor A Malfunction
#5: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Tue May 08, 2012 4:20 pm ---- Pretty sure it was that but I had the speed sensor code to it might have been p1387 or something I cam check tomorrow I have the print out. Either way one was deff the positive short circuit one
#6: Re: Few elec questions Author: Seabook, Posted: Tue May 08, 2012 4:24 pm ---- as for the fuse, the O2 sensor share fuse with ignition coil, injectors and fuel pump so you can rule that out
#7: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Tue May 08, 2012 4:26 pm ---- Hmmm I did think it would be shared. I'm stumped! Cannot for the life of me think of what to do next
#8: Re: Few elec questions Author: Seabook, Posted: Tue May 08, 2012 4:34 pm ---- are you sure you got the correct sensor?
#9: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Tue May 08, 2012 11:46 pm ---- Yeah
#10: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 1:05 am ---- The fault code was P0138
#11: Re: Few elec questions Author: V9977, Location: Athens, GreecePosted: Wed May 09, 2012 1:19 am ---- Just told my reader and it says:
P0138: O2 Sensor Circuit High Voltage Bank 1 Sensor 2
So it's not a short. Maybe it's getting an incorrect reeading due to being in mid-air.
Or the sensor is shafted.
#12: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 2:03 am ---- It can't be the sensor as it is literally brand new bought yesterday lunch time?!
Is there any one in milton Keynes that can have a look see if I'm missing something?
#13: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 3:06 am ---- Ok after researching the fault, the suggestion is to replace the short to the battery voltage. Any one know how to do this??
#14: Re: Few elec questions Author: Seabook, Posted: Wed May 09, 2012 3:15 am ---- well high voltage means it is running rich.
you sure your lambda sleeve is good and not leaking?
could try to warp it up and see if things change?
#15: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 3:34 am ---- Yeah I'm sure it's ok it's a sealed unit once the lambda is I'm there
#16: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 5:44 am ---- Any one else?
#17: Re: Few elec questions Author: Dan-, Location: BiggleswadePosted: Wed May 09, 2012 6:17 am ---- Check the wire going to the sensor, for 4 months I had the Eml on and had the code read came up as co2 sensor, changed it and 5 miles down the road it came back on, the wires above the gearbox had snapped so wansnt getting power,
#18: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 6:54 am ---- The ones from the connector to the sensor are fine I will have to check the rest but they atre tied into the main loom
#19: Re: Few elec questions Author: Dan-, Location: BiggleswadePosted: Wed May 09, 2012 7:03 am ---- Mine had a break here
Hope this helps
#20: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 7:23 am ---- That's brilliant thanks I'll check there this evening, fingers crossed
#21: Re: Few elec questions Author: CHAOS94, Location: readingPosted: Wed May 09, 2012 10:00 am ---- do what i did i captured a cheater and straped it in my engine bay it goes like the clappers and fuel cost is pretty low
#22: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Wed May 09, 2012 10:53 am ---- Er thanks for that?
#23: Re: Few elec questions Author: Andrew, Location: Black Country Ay IPosted: Wed May 09, 2012 4:45 pm ---- Have you changed the pre cat sensor? Would that also cause this problem, anyone?
#24: Re: Few elec questions Author: Danw_VVT, Location: Herts/LondonPosted: Thu May 10, 2012 12:41 pm ---- No it's not the pre cat as the fault code is for the bank 1 sensor 2.
Still going through the short to battery to check for damage hmmmmm
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