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

• 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.