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Post by ironman on Jan 17, 2023 14:35:25 GMT
Hello All, I have an issue with my MK7 2013 2.0 TDI GT. The MFD is showing oil sensor: workshop. The oil level sensor and the sensor in the engine block has been replaced but I still get the error displayed. What used to happen previously was, The oil temperature on the MFD would fluctation up and down but since the replacement it's completely blank and issue not rectified. The mechanics believe it's an electronic issue. Can anbody kindly provide an guidance or has any had this issue previously ? Thanks!   |
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Post by dv52 (Australia) on Jan 18, 2023 1:27:46 GMT
First, you say "The oil level sensor and the sensor in the engine block has been replaced". I think that I understand "oil level sensor" - it's the 3 x pin device that the wiring diagram calls G266- Oil level and oil temperature sender. But what is "the sensor in the engine block?
hmm...... of course anything is possible and forums like this are a notoriously bad medium on which to conduct diagnostic analysis - but based purely on the information that you have provided, I'm not sure if I agree with your mechanic's view that "it's an electronic issue".
The primary logic for my hypothesis is my assumption that this car has had NO coding changes related to the replacement of oil-level sensor (and the other sensor). If I'm correct, and given that you still have access to the oil level function on the MFD screen (albeit with a "blank" reading) - I can't see how this is "an electronic issue".
My hunch, again based entirely on your words is that the original "fluctuation" problem with the oil-level sender might not have been fixed by the replacement unit - maybe? Instead, what I suspect has happened when the sender was replaced is that the related work turned an intermittent fault into a static fault. Or said another way, the original fault is still present - it has just morphed into NO signal at all from the sender rather than a signal sometimes!! I suspect this is why you are getting a "blank" oil level reading - because there is no signal being received by the engine module
So, I suspect that the culprit here is physical, rather than "electronic" - it might be an problem in the wiring loom, or a faulty termination on a connector related to the sender.
G266 is a simple 3 x pin transducer. I suggest that the mechanic grabs a multi-meter and that he confirms volts (I suspect 5V from the ECU) and earth - this test must be measured @ the sender connector. If the power supply to G266 is OK, then confirm the integrity of the wire connection from G266 to the engine module (the correct pin # on the hex01 module varies with the engine type - so refer to the wiring diagram)
Of course, all the stuff that I've written above assumes that the replacement sender is correct for the engine on this car. Did the mechanic replace like-for-like (meaning EXACT same part number)? I ask because the error message in your 1st screenshot says the the reading is static "High" (i.e. always "high")!! This raises the possibility that the new sender is operating OK - but the engine module is expecting lower signal values from the sender - hence my question about the compatibility of the new sender!
Don
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Post by ironman on Jan 18, 2023 18:25:11 GMT
Hi,
Thank you very much for getting back to me, I think you have got it bang on.
So, This is where I might have confused things. The screenshots I had attached showed coolant temperature and air intake temperature. The sensor near the DSG oil filter is the coolant sensor I believe. What I noticed previously when the original sensor was in place was that the oil temperaure on the MFD would fluctuate. However, When I disconnected the coolant sensor, The oil temperature on the MFD was blank as it is now.
Having spoken to VW about this, They suggested that it wasn't "oil sensor - under the car" - This just confused the hell out of me and the mechanics.
I suspect it's the sensor at fault, I've been told it's like for like but not the exact make/manufacturer.
The Car has been to two fairly competent Mechanics with extensive experience - Starting to question this now. :-(
Tempted to purchase the sensor myself from VW and have it changed during the next service interval.
Thanks Don!
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Post by ironman on Sept 25, 2023 9:18:46 GMT
Been quite a while on this one.
I've identified that if I turn off the Flexible Service Interval (LongLife) "Not Active" then oil sensor: workshop error dissappears. However, It also disables the "oil temperature" in the MFD.
I'm not sure whether this disables other components as part of this "flexible service long life" nonsense.
Hella sensor has been superseded by another which I now have. It will be replaced as part of my routine service.
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