Note On Intermittents

Manipulate power steering pressure switch connector with engine running. If intermittent is created, code will set. Disconnect and reconnect power steering connector to ensure it is properly latched.

Fig 1: PCM Code P040 Schematic - Open PSPS Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code P040 Flow Chart - Open PSPS Circuit

Courtesy of GENERAL MOTORS CORP.