Posts Tagged: P0551

P0551

P0551 Power steering switch malfunction If you have a P0551 Power steering switch malfunction trouble code, read this article. The computer looks for the vehicle to be driven at least 40MPH for more than 30 seconds. The power steering switch is “normally closed,” meaning that the computer always sees voltage. If the computer see an OPEN on 2 or more trips, it sets this P0551 code. The 40MPH figure is important. The whole purpose of the power steering pressure switch is to increase idle speed when the power steering pressure … Read More