[amidgeha]

Internal Control Module O2 Sensor Processor Performance

The Powertrain Control Module (PCM) monitors the application-specific integrated circuit that controls and monitors the heated oxygen sensor (HO2S). The test fails when the PCM detects an internal circuit or communication concern.

Cause:
Faulty Powertrain Control Module (PCM)
PCM harness is open or shorted
PCM circuit poor electrical connection

Symptoms:
Check engine light