P0551

Tests 1 - 3:

Tests 4 - 6:

SYMPTOM
P0551 - POWER STEERING SWITCH FAILURE

WHEN MONITORED
With the ignition ON engine running.

SET CONDITION
With the vehicle above 40 mph for over 30 seconds, the power steering pressure switch remains open

POSSIBLE CAUSES
- Power steering pressure switch ground circuit open
- Power steering pressure switch circuit open
- Power steering pressure switch circuit shorted to ground
- Power steering pressure switch defective
- PCM defective