DTC P2531 (PCM) - Ignition Switch Run Position Circuit Low

DTC DESCRIPTION P2531 (PCM) - IGNITION SWITCH RUN POSITION CIRCUIT LOW

Description: The PCM carries out a logic check on the ISP-R and ISP-R/S circuits. This DTC sets when the PCM detects the ISP-R circuit low when it is expected to be high.
Possible Causes: ISP-R circuit open ISP-R circuit short to ground PCMRC circuit short to ground Ignition circuit fuse Damaged ignition switch Damaged PCM
Diagnostic Aids: The KEYST parameter identifier (PID) should display RUN when the ignition is in the ON position.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST B .