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HOMESERVICE MANUALSAUDI2005A6 3.2 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 97 (4.2L - GENERIC SCAN TOOL, ENGINE CODE(S): BVJ (ST-GENERIC SCAN TOOL))ST - GENERIC SCAN TOOLDIAGNOSTIC MODESMODE 03 - INTERROGATING FAULT MEMORY
2005 Audi A6 3.2 T

Mode 03 - Interrogating Fault Memory

2005 Audi A6 3.2 TSECTION Mode 03 - Interrogating Fault Memory
WARNING: This page is about a different car, the 2011 Audi A6, 2010 Audi A6, 2009 Audi A6, 2008 Audi A6, and 2007 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.

Description 

When the Engine Control Module (ECM) recognizes an emission related fault it turns on the Malfunction Indicator Lamp (MIL) or if a Electronic Throttle Malfunction is recognized, the Engine Control Module (ECM) turns on the Electronic Power Control (EPC) Warning Lamp which are both located in the instrument cluster.

Diagnostic Mode 03 is used to retrieve and view any DTC which may be stored in the Engine Control Module (ECM).

The DTCs are sorted by SAE code with the DTC tables consisting of a 5-digit alpha-numeric value.

NOTE:
  • Depending on scan tool and protocol used, diagnostic mode 03 and the information provided may be referred to by a different name.

The following tables provide a breakdown and explanation of the DTC code.

P-Codes 

Component group
P x x x x DTC for the drivetrain
Norm-Code
P 0 x x x Trouble codes defined by SAE with specified malfunction texts
P 1 x x x Additional emission relevant DTCs provided by the manufacturer
P 2 x x x DTCs defined by SAE with specified texts, from MY 2000
P 3 x x x Additional emission relevant DTCs provided by the manufacturer from MY 2000
Component group
Repair group
P x 0 x x Fuel and air mixture and additional emission regulations
P x 1 x x Fuel and air ratios
P x 2 x x Fuel and air ratios
P x 3 x x Ignition system
P x 4 x x Additional exhaust system
P x 5 x x Speed and idle control
P x 6 x x Control module and output signals
P x 7 x x Transmission
P x 8 x x Transmission
P x 9 x x Control modules, input and output signals

U-Codes 

Component group
U x x x x DTC for network (CAN bus)
Norm-Code
U 0 x x x Trouble codes defined by SAE with specified malfunction texts

Procedure 

  • Connect the scan tool.
  • Switch the ignition to the "ON" position.
  • Select "Diagnostic Mode 03: Interrogating fault memory ".
  • The stored DTC or DTCs will be displayed on the scan tool screen.

The following table is an example of the DTC information that may be displayed on the scan tool screen:

Indication example Explanation
P0444 SAE Diagnostic Trouble Code (DTC)
Evaporative Emission (EVAP) Canister Purge Regulator Valve Malfunctioning wiring path or malfunctioning component
Circuit Open Malfunction type as next

Refer to the following DTC tables for the diagnostic repair procedure:

  • Switch the ignition off.
  • End of diagnosis. 
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.