E028

Code E28:

3rd or 4th Gear Pressure Switch Circuit:

DESCRIPTION:

This diagnostic test monitors the 3rd or 4th gear pressure switch for an open position, when the transmission selector is in Park or Neutral and the vehicle speed is 0. The location of the pressure switch is in the left front of the engine compartment in the transmission.

TEST CONDITIONS:

1. Code E24 not set.
2. Transmission in Park or Neutral.
3. Vehicle speed 0 MPH.

FAILURE CONDITION:

3rd or 4th gear pressure switch open when the vehicle is stopped and the transmission selector is in Park or Neutral.

ACTION TAKEN:

1. ECM turns on "SERVICE ENGINE SOON" telltale.