P0551

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0551-POWER STEERING SWITCH PERFORMANCE

WHEN MONITORED
Engine running. Vehicle speed at 50 mph (80.5 km/h) 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 km/h) and the engine coolant temperature above 20 °C (68 °F). Two trip fault.

POSSIBLE CAUSES
- Good Trip Counter = 0
- Power Steering Pressure Switch (Z12) Ground Circuit Open
- (K10) PSP Switch Signal Circuit Shorted To Ground
- (K10) PSP Switch Signal Circuit Open
- Power Steering Pressure Switch
- PCM