P02E1 - DIESEL INTAKE AIR FLOW CONTROL PERFORMANCE

The DIAFCS (Diesel Intake Air Flow Control System) is usually located screwed to the intake manifold in the intake airflow. This system controls the quantity of inflowing air through changing a signal to the engine driven by the PCM (Powertrain Control Module). The engine is responsible for opening and closing a throttle plate that regulates airflow.

The PCM is informed of the amount of clean, filtered air entering the engine, thanks to data provided by the MAF sensor. When the Air Flow Control System is activated, the PCM should notice a change in flow. If not, it will be considered an erratic operation.

When the P02E1 OBDII diagnostic code is stored, it is due to the detection of performance problems within the Diesel Intake Air Flow Control.

• Check Engine light illuminated.
• The Electronic Throttle Control indicator blinks.
• Unstable idle speed.
• Diesel Particulate Filter has no regeneration.

The P02E1 OBD2 fault code is set by the following:

• Diesel Intake Air Flow Control System wiring or wires may have been damaged.
• Signal or ground circuit to engine/DIAFCS control may be open or shorted.
• The engine/DIAFCS control may be in poor condition.

To troubleshoot the DTC P02E1 OBDII consider the following:

• As a first step consult the TSB.
• Check the cables associated with the Diesel Intake Air Flow Control System for deficiencies. If you detect wear or burns on these components, proceed with the appropriate adjustments.
• Check the signal, voltage, and ground circuits of the engine/DIAFCS control for conditions that would result in a short or open circuit. If you discover one of these deficiencies, make the necessary corrections.
• Verify the integrity of the DIAFCS motor/control, taking into account the manufacturer's recommendations. If damage is found on the motor/control, proceed with the necessary corrections.