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 Posted: Tue May 08, 2012 4:02 pm |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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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
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Last edited by Danw_VVT on Wed May 09, 2012 1:06 am; edited 1 time in total
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Posted: Tue May 08, 2012 4:15 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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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.
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Tue May 08, 2012 4:18 pm |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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Sensor is brand new today so can't beleive it could be the wiring on that?
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Posted: Tue May 08, 2012 4:18 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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hmm.....
you sure about the fault code reading?
i though P0500 is Vehicle Speed Sensor A Malfunction
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Posted: Tue May 08, 2012 4:20 pm |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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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
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Posted: Tue May 08, 2012 4:24 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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as for the fuse, the O2 sensor share fuse with ignition coil, injectors and fuel pump so you can rule that out
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Posted: Tue May 08, 2012 4:26 pm |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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Hmmm I did think it would be shared. I'm stumped! Cannot for the life of me think of what to do next
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Posted: Tue May 08, 2012 4:34 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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are you sure you got the correct sensor?
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Posted: Tue May 08, 2012 11:46 pm |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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Yeah
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Posted: Wed May 09, 2012 1:05 am |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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The fault code was P0138
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Posted: Wed May 09, 2012 1:19 am |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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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.
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Wed May 09, 2012 2:03 am |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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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?
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Posted: Wed May 09, 2012 3:06 am |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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Ok after researching the fault, the suggestion is to replace the short to the battery voltage. Any one know how to do this??
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Posted: Wed May 09, 2012 3:15 am |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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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?
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Posted: Wed May 09, 2012 3:34 am |
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Joined: Apr 26, 2010
Posts: 5489
Trade Rating: +12
Location: Herts/London
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Yeah I'm sure it's ok it's a sealed unit once the lambda is I'm there
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