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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1650 Or DTC P1651 (B2300) >> Detection Condition

Detection Condition

WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: DTCs only apply to 2.3L equipped vehicles.
  • DTC P1650 indicates PSP signal to PCM is high during KOEO or PSP signal did not change state during KOER.
  • DTC P1651 indicates PSP signal is open or shorted. PCM expects PSP signal to change after a calibrated number of speed transitions.

Power Steering Pressure (PSP) monitors hydraulic pressure within power steering system. PSP switch is normally closed that opens as hydraulic pressure increases. PCM uses input signal from PSP switch to compensate for additional loads on engine by adjusting idle RPM and preventing engine stall during parking maneuvers. It also signals PCM to adjust transmission Electronic Pressure Control (EPC) during increased engine load.

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