Service Information

Cruze

DTC P1471

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P1471 00: Diesel Particulate Filter (DPF) Regeneration Incomplete

The soot particles accumulate in the channels of the DPF and are burned off at regular intervals, through a process called regeneration or cleaning. The DPF cleaning process prevents the DPF from clogging. Excess soot in filter can cause a drop in engine performance and crack the filter during regeneration.

Conditions for Running the DTC

•	The engine is running.

•	The engine coolant temperature (ECT) is between 73–96°C (163–205°F).

Conditions for Setting the DTC

•	The ECM detects too many interrupted regenerations.

•	The above condition is met.

Action Taken When the DTC Sets

DTC P1471 is a Type B DTC.

Conditions for Clearing the DTC

DTC P1471 is a Type B DTC.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

The following conditions must be met for the ECM to perform the turbocharger learn procedure:

•	The A/C is OFF.

•	The vehicle is in Park or Neutral.

•	Start and idle the engine.

•	The engine coolant temperature is greater than 40°C (104°F).

Perform the DPF Service Regeneration.
Verify the DTC does not reset.

⇒	If the DTC resets, replace the DPF filter.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.