P0550
P0550 PSP SensorComponent Description
Power steering pressure (PSP) sensor is installed to the power steering high-pressure tube and detects a power steering load.This sensor is a potentiometer which transforms the power steering load into output voltage, and emits the voltage signal to the ECM. The ECM controls the electric throttle control actuator and adjusts the throttle valve opening angle to increase the engine speed and adjusts the idle speed for the increased load.
On Board Diagnosis Logic
The MIL will not light up for this diagnosis.
NOTE: If DTC P0550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. P0643
P0550:
DTC Confirmation Procedure
NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
WITH SDT
1. Start engine and let it idle for at least 5 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to [P0550 PSP Sensor].
WITH GST
Follow the procedure "WITH SDT" above.
Diagnosis Procedure
Step 1:
Step 2:
Step 3-6:
Component Inspection
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the following conditions.
