SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 8 (COMPUTER/INTEGRATING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC U2104CONDITIONS FOR CLEARING THE MIL/DTC
2006 Pontiac G6 GTP, 2D Coupe, Standard

Conditions for Clearing the MIL/DTC

2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Conditions for Clearing the MIL/DTC
WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.
  • A current DTC clears and the MIL is turned OFF when the fault is no longer detected after the 3rd consecutive drive cycle.
  • A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the fault, or does not reoccur after 40 consecutive drive cycles.
  • A history DTC clears if there is a battery disconnect.
DTC U2104

Step Action Yes No
Schematic Reference: Data Link Connector (DLC) Schematics 
Connector End View Reference: Master Electrical Component List in Wiring Systems
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install the scan tool.
  2. With the scan tool, communicate with the body control module (BCM), engine control module (ECM), and transmission control module (TCM).
  3. Monitor the DTC information.
Does the scan tool indicate that DTC U2100 sets as either a current or history DTC?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information Go to Step 3 
3
IMPORTANT: Turn ON the ignition, with the engine OFF when testing for a short to voltage. Use a DMM MIN/MAX function to capture intermittent conditions.
Test the CAN serial data circuits for the following:
  • A short to ground
  • A short to voltage
  • A short across controller area network (CAN) high and CAN low circuits
  • An open
Refer to the following in Wiring Systems:Did you find and correct the condition?		 Go to Step 6  Go to Step 4 
4 Inspect for poor connections at the harness connector of the module that is not communicating.
Did you find and correct the condition?		 Go to Step 6  Go to Step 5 
5 Replace the control module that is not communicating. Refer to Control Module References  for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 6  -
6
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition switch.
  3. Wait at least 10 seconds.
  4. Turn ON the ignition, with the engine OFF.
  5. Retrieve the DTCs from the ECM, BCM, and TCM.
Does the DTC reset?		 Go to Step 2  System OK
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.