P0551

Tests 490 - 494:

Test 495:

SYMPTOM
P-0551 POWER STEERING SWITCH FAILURE

WHEN MONITORED
With the ignition key on and 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 ckt open
- Power steering pressure switch defective
- Power steering pressure switch circuit open
- Power steering pressure switch ckt short to ground
- PCM defective