Editing DTC Lists

Modified on Thu, 14 Dec 2023 at 01:48 PM

EDITING DTC LISTS

Lists of Diagnostic Trouble Codes (DTCs) that can be produced by the vehicle are located in the Engine Diag group and the Trans Diag group. In most cases, VCM Editor allows you to specify whether a particular DTC is reported and whether it will cause the Malfunction Indicator Light (MIL) to be lit.

NOTE: Tampering with emissions control devices (including emissions-related DTCs) can be illegal. Check local laws as well as national rules and regulations to determine what is legal to modify. Emission controls should be disabled only in the case of vehicles whose intended use exempts them from emissions regulations (for example, vehicles that are for track use only).

To view the list of engine-related DTCs, select Engine Diag > DTCs.
To view the list of transmission-related DTCs, select Trans Diag > DTCs.

Configuration options available for DTCs vary by vehicle manufacturer.

CONFIGURING GM DTCS

On GM vehicles, you can configure whether each DTC is reported and whether it triggers the Malfunction Indicator Lamp (MIL) and the SES lamp.

SES ENABLE

Checking this box enables the display of the SES/Check Engine/Service Vehicle Soon lamp when this DTC occurs.

Unchecking this box disables the lamp.

NOTE: In some regions, emissions testing will fail automatically if monitoring for emissions-related faults is disabled.

ERROR MODE

The option selected in this dropdown specifies whether the MIL is lit for this DTC and whether the error is reported.

MIL on First Error. Illuminates the MIL the first time the error is detected. This is appropriate for emissions-related faults that should be reported immediately.
MIL on Second Error. Illuminates the MIL if the fault is active for 2 consecutive driving cycles. This is appropriate for emissions-related faults that should trigger the MIL if they are detected consistently, but should NOT trigger the MIL when they are detected infrequently.
No MIL Light. The MIL will not be illuminated for this fault, but the SERVICE lamp will be illuminated. This is appropriate for non-emissions-related faults that should be reported to the driver.
No Error Reported. Neither the MIL nor the SERVICE lamp will be illuminated for this fault. This is appropriate for non-emissions related faults that should not be reported to the driver.

CONFIGURING FORD DTCS

On Ford vehicles, the Error Mode dropdown specifies whether each DTC should be reported and whether the MIL should illuminate when the fault occurs. It has three settings:

MIL Light. The MIL will be illuminated when this fault is detected. This is appropriate for emissions-related faults.
No MIL Light. The MIL will not be illuminated when this fault is detected. However, the fault will be reported. This is appropriate for non-emissions-related faults that should be reported.
No Error Reported. The MIL will not be illuminated when this fault is detected and the fault will not be reported. This is appropriate for non-emissions-related faults that should not be reported.

CONFIGURING DODGE/RAM/JEEP/CHRYSLER DTCS

On these vehicles, there are two settings for each DTC:

SES Enable. Checking this box enables monitoring for this fault. Unchecking it disables the monitor.

NOTE: In some regions, emissions testing will fail automatically if monitoring for emissions-related faults is disabled.

MIL.Check this box if the MIL should be illuminated when this fault is detected.

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