P0551

Test 1 - Test 2:

Test 3 - Test 6:

SYMPTOM
P0551-POWER STEERING SWITCH PERFORMANCE

WHEN MONITORED
Engine running. Vehicle speed at 50 MPH (80.5 KMh) or greater. Coolant temperature above 20° C (68° F).

SET CONDITION
The power steering pressure switch remains open for 40 seconds or greater while both the vehicle speed is at 50 MPH (80.5 KMh) and the engine coolant temperature above 20° C (68° F). Two trip fault.

POSSIBLE CAUSES
- Good trip counter = 0
- Power steering pressure switch (Z1) ground circuit open
- (K10) PSP switch signal circuit shorted to ground
- (K10) PSP switch signal circuit open
- Power steering pressure switch
- PCM