Unexpected response from Self-Test monitors. P1001 - KOER Not Able To Complete, KOER Aborted This Non-MIL (Malfunction Indicator Lamp) code will be set when Key On Engine Running (KOER) Self-Test does not complete in the time intended. The DTC does not need to be cleared from the PCM except to pass an inspection/maintenance test. PTO circuit is shorted to VPWR or B+ or PTO is on during testing PCM DTCs have recently been cleared with a scan tool Vehicle is new from the factoryīattery or PCM had recently been disconnectedĪn OBD II monitor failure had occurred before completion of an OBD II drive cycle The DTC will be stored in continuous memory if any of the OBD II monitors do not complete. P1000 - Monitor Testing Not Complete The on board diagnostic II (OBD II) monitors are performed during the OBD II Drive Cycle. Transmission shift not indicating neutral while in KOEO Self-TestĬheck RS PID while exercising shift lever in and out of reverse. P0812 - Reverse Switch (RS) input circuit malfunction The DTC indicates that the voltage is high when it should be low. OSS sensor damaged, or not installed properly P0723 - Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted. Damaged OSS connectorĭamaged OSS sensor, or not installed properly P0722 - No signal from Output Shaft Speed sensor The output shaft speed sensor failed to provide a signal to the PCM upon initial movement of vehicle. This noise distorts the input to the PCM. P0721 - Noise interference on Output Shaft Speed sensor signal The output shaft speed sensor signal is very sensitive to noise. Verify sensor signal output varies with vehicle speed. The PCM compares this signal with the signal of the VSS or TCSS and determines correct tire size and axle gear ratio.
P0720 - Insufficient input from Output Shaft Speed sensor The output shaft speed sensor inputs a signal to the PCM, based on the speed of the output shaft of the transmission. When depressing the CPP switch the voltage should cycle from 5.0V down. If the PCM does not see this change from high to low the DTC is set. P0704 - Clutch Pedal Position Switch Malfunction When the clutch pedal is depressed the voltage goes to low. Follow correct Self-Test procedures, refer to Section 2 of Quick Test. (Rear Electronic Module Windstar and LS6/LS8 or Lighting Control Module (LCM) Continental and Town Car.Ĭheck for proper function of stoplamps. Malfunction in module(s) connected to BPP circuit. P0703 - Brake Switch Circuit Input Malfunction Indicates PCM did not receive a brake pedal position (BPP) input. An attempt was made to change the calibration.Ĭheck for other DTC's or drive symptoms for further action. P0605 - PCM read only memory (ROM) error Indicates the PCM ROM has been corupted.
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