Note On Intermittents

Manipulate wiring on circuit No. 410, coolant sensor and PCM connector while observing PCM parameter PD04. If failure is induced, coolant temperature will jump from its normal value to shorted reading of 148°C or greater. Disconnect and reconnect coolant sensor and PCM connectors, and ensure they properly latch. If wiring and connectors are okay, substitute a known good sensor, and retest.

Fig 1: PCM Code P014 Schematic - Shorted Coolant Sensor Signal

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code P014 Flow Chart - Shorted Coolant Sensor Signal

Courtesy of GENERAL MOTORS CORP.