Oil pressure warning.

scott 20v · 09-01-11, 04:01 PM

On my 20v coupe quattro with 7a engine, the oil warning on the self check has started to come on when I switch on the ignition. The oil pressure gauge also shows about half a bar with the engine still off. When I start the engine oil pressure rises and light goes out as normal. Any ideas??

BW2309 · 09-01-11, 04:10 PM

Most likely either oil pressure gauge or failed dash pod. The gauge reads off the large sensor where as the warning works off a low pressure switch in the same place. Be sure to physically check the oil pressure though, don't assume gauge right and warning wrong!! Best safe than sorry!!
All the 5 pots suffer from sludge build up in the sump and can starve the back cylinders crank journals.

scott 20v · 10-01-11, 05:50 PM

Thanks. Everything is normal with engine running though!!

msh · 10-01-11, 06:03 PM

Pressure gauge showing something with engine off should be faulty sender. I had such thing in my A90q.
When u turn on ignition, is there only oil pressure warning from autocheck, or oil pressure warning light comes on as well?

scott 20v · 13-01-11, 08:03 PM

Thanks. Just getting the oil light on the self check. I was thinking it might be a faulty sender or maybe just a bad connection. I think I'll give the sender connections a clean before I do anything else.

09-01-11, 04:10 PM	#2
BW2309 Banned Join Date: Sep 2008 Location: Derby Posts: 1,245	Most likely either oil pressure gauge or failed dash pod. The gauge reads off the large sensor where as the warning works off a low pressure switch in the same place. Be sure to physically check the oil pressure though, don't assume gauge right and warning wrong!! Best safe than sorry!! All the 5 pots suffer from sludge build up in the sump and can starve the back cylinders crank journals.

10-01-11, 05:50 PM	#3
scott 20v Newbie! Join Date: May 2010 Posts: 10	Thanks. Everything is normal with engine running though!!

10-01-11, 06:03 PM	#4
msh 4 ring whore! Join Date: Jun 2008 Location: Rucava, Latvija Posts: 3,816	Pressure gauge showing something with engine off should be faulty sender. I had such thing in my A90q. When u turn on ignition, is there only oil pressure warning from autocheck, or oil pressure warning light comes on as well?

13-01-11, 08:03 PM	#5
scott 20v Newbie! Join Date: May 2010 Posts: 10	Thanks. Just getting the oil light on the self check. I was thinking it might be a faulty sender or maybe just a bad connection. I think I'll give the sender connections a clean before I do anything else.