P1651low severityPowertrain
PSP Switch Input Malfunction
on 2018 Lincoln MKX 2.7L EcoBoost V6 · AWD
What this code means
The Power Steering Pressure switch input to the PCM is not functioning properly. The PCM cannot detect steering load changes.
Symptoms
- Engine stalls when turning at idle or low speed
- Check Engine Light
- No idle speed increase when turning wheel
Common causes
- Faulty PSP switch
- Wiring open or short in PSP circuit
- Low power steering fluid
- Corroded connector
Diagnostic steps
- Test PSP switch with scan tool — verify signal changes when steering
- Check PSP switch connector
- Test wiring continuity
- Check power steering fluid level
Repair notes
Replace PSP switch. Repair wiring. Top off power steering fluid.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1