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- Dec 24, 2006
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Hey guys
Seems to be the first major fault with my 2014 S3 since ownership this last 3 years.
Bit of info on my S3 in case you don't know or remember:
2014
47k miles
Revo Stage 3+ (important: entire LPFP and HPFP internals changed around Oct 2018)
Meticulously maintained
etc...
Just this last month, an "automatic start/stop: system fault! Function unavailable" notice comes up on the DIS.
At the time, I went another drive, start/stop worked fine, turned off engine and on, etc... went away.
Next time it happened, I drove up to a junction, engine stopped as normal but I immediately pressed accelerator to go, so the engine stopped momentarily and started again. Next thing, engine management light came on.
Plugged on OBD11 and the following showed up on engine:
Only seems to happen after the engine cuts off for start/stop and when I have it turned off manually, the engine light never comes on.
So, on initial Dr.Google diagnosis there are a few things to check:
Any other suggestions or advice from previous experience?
Thanks
Seems to be the first major fault with my 2014 S3 since ownership this last 3 years.
Bit of info on my S3 in case you don't know or remember:
2014
47k miles
Revo Stage 3+ (important: entire LPFP and HPFP internals changed around Oct 2018)
Meticulously maintained
etc...
Just this last month, an "automatic start/stop: system fault! Function unavailable" notice comes up on the DIS.
At the time, I went another drive, start/stop worked fine, turned off engine and on, etc... went away.
Next time it happened, I drove up to a junction, engine stopped as normal but I immediately pressed accelerator to go, so the engine stopped momentarily and started again. Next thing, engine management light came on.
Plugged on OBD11 and the following showed up on engine:
- P008700 Fuel Rail/System Pressure too low
- P308D00 Fuel Pump Engine Speed too low
Only seems to happen after the engine cuts off for start/stop and when I have it turned off manually, the engine light never comes on.
So, on initial Dr.Google diagnosis there are a few things to check:
- I have read about a sensor to do with start stop that could be faulty but I have no part number
- Could be an issue with the cam follower (which I changed in Oct 18 for the HPFP internals)
- Could be an internal cam shaft issue but IMO I don't think so as the car performs perfectly fine 70+ miles a day
Any other suggestions or advice from previous experience?
Thanks