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Oil pressure light

Tiny
AUDIOWNER18
  • MEMBER
  • 1998 AUDI A4
  • 2.8L
  • 6 CYL
  • AWD
  • MANUAL
  • 105,000 MILES
Oil pressure light was on. Changed pressure switch and now light doesn't come on till 2000 rpm
Tuesday, March 29th, 2016 AT 6:20 PM

5 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
Do you mean the light is off all the time until a higher engine speed is reached, then it turns on? That sounds like the light circuit is connected to a sending unit for a gauge.
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Tuesday, March 29th, 2016 AT 7:45 PM
Tiny
AUDIOWNER18
  • MEMBER
  • 4 POSTS
Light was on all the time until we changed the pressure switch. Now light is off at idle but comes on at 1800 to 2000 rpm and stays on till you come to a stop
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Tuesday, March 29th, 2016 AT 8:30 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
Gotta be the wrong sending unit. Check the actual oil pressure with a mechanical gauge first to be sure it's okay.
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Tuesday, March 29th, 2016 AT 9:02 PM
Tiny
AUDIOWNER18
  • MEMBER
  • 4 POSTS
Will take the car to have pressure checked in the morning. Thanks and will let you know the results.
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Tuesday, March 29th, 2016 AT 9:40 PM
Tiny
AUDIOWNER18
  • MEMBER
  • 4 POSTS
Took car to mechanic. Checked oil pressure and found 15 psi drop at 2000 rpm. Ruled out plugged intake screen and looks like bearing problems
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Wednesday, March 30th, 2016 AT 7:10 PM

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