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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> DTC P1650: - Power Steering Pressure (PSP) Switch Out Of Self-Test Range

DTC P1650: - Power Steering Pressure (PSP) Switch Out Of Self-Test Range

DTC P1650: - POWER STEERING PRESSURE (PSP) SWITCH OUT OF SELF-TEST RANGE

Description:  In the key on engine off (KOEO) self-test, this DTC indicates the PSP input to the powertrain control module (PCM) is high. In the key on engine running (KOER) self-test, this DTC indicates the PSP input did not change state.
Possible Causes: 
  • The steering wheel must be turned during KOER self-test
  • PSP switch/shorting bar damaged
  • SIG RTN circuit open
  • PSP circuit open or shorted to SIGRTN
Diagnostic Aids:  Check if the vehicle was towed or a power steering repair was carried out. Observe the PSP PID while checking the wires for intermittent concerns.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test FF . GO to Pinpoint Test FF . -