P1619
#1
Retired Senior Admin
Expert Gearhead
Thread Starter
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes
on
24 Posts
P1619
P1619
Description
ENGINE OIL LIFE MONITOR RESET CIRCUIT
To determine engine oil life remaining, PCM monitors ECT,
number of crankshaft revolutions, vehicle speed, and calculated oil
temperature. When PCM determines oil is at end of useful life, it will
send a signal through Serial Data Line (SDL) to illuminate CHANGE OIL
SOON indicator.
Symptoms
You likely won't notice any drivability problems.
Causes
Solutions
Description
ENGINE OIL LIFE MONITOR RESET CIRCUIT
To determine engine oil life remaining, PCM monitors ECT,
number of crankshaft revolutions, vehicle speed, and calculated oil
temperature. When PCM determines oil is at end of useful life, it will
send a signal through Serial Data Line (SDL) to illuminate CHANGE OIL
SOON indicator.
Symptoms
You likely won't notice any drivability problems.
Causes
- Oil Life Monitor (OLM) reset circuit is grounded for greater
than 60 seconds.
Solutions
- Check for faulty connections or damaged harness.
- Replace OLM reset switch.