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Alfa Romeo DTC

Alfa Romeo DTC P0139

Manufacture

Alfa Romeo DTC

Code

P0139

Definition

O2 Sensor Circuit Slow Response Bank1 Sensor 2

Description

The Powertrain Control Module (PCM) monitors the downstream O2 Sensor. If the PCM does not detect a rich to lean switch within a specific time during a decel fuel shutoff event, the monitor will fail.

Cause

  • none

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