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The Daily Insight

What do you need to know about DTC codes?

Author

John Thompson

Published May 06, 2026

What do you need to know about DTC codes?

In fact, DTC codes are reports generated from the functioning of car sensors. In order to comprehensively understand fault codes, it’s necessary to understand the different car sensors in an OBD vehicle. The MAF sensor is used by the vehicles computer in determining the amount of air flowing into the engine.

Where are DTC codes stored in a PMC?

DTC fault codes are stored in the PMC memory when the later identifies a problem. For OBD II systems, they are represented in five-digit alphanumeric code numbers. DTCs that are related to emissions will often start with P0xxx whereas codes starting with P1xxx are manufacture specific and will mostly not trigger the MIL light.

When does a DTC report a sensor fault?

When a DTC reports a sensor fault, the fault will mostly be resulting from two main spots; the system being monitored by the sensor, or the wiring to the sensor. Replacing the sensor itself will therefore not solve the problem and it’s prudent that the driver or technical decodes the underlying problem.

What are the core services of the DTC?

DTC’s core services include: DTCC’s Settlement Services, offered through DTC, reduce cost and risk and boost efficiencies in the marketplace by providing end-of-day net settlement obligations for clients resulting from trading activity in equities, debt and money market instruments.

Which is an example of a DTC code?

The final piece of a DTC is a number that defines the exact problem that you’re experiencing. It can be a number between zero and 99. Here’s an example of a complete code: P0782 means powertrain, generic, transmission, 2-3 shift malfunction.

How does DTC work with issuers work with DTCC?

If a reorganization such as a corporate merger or tender offer occurs, DTC handles the transfer of cash and stock to the appropriate investment bank or broker/dealer, which then passes it on to their investors.

Where can I find DTC security position report?

Issuers and their authorized third-party agents can use DTC’s Security Position Report web service (SPR) throughout the year to obtain position information on their securities as needed. For more information, visit DTCC SPR.

How long is a non critical DTC code?

Non-critical codes include those that light up the Malfunction Indicator Lamp (MIL), also known as the Check Engine Light. Type two codes also store a freeze-frame that has failed consecutively after two driving cycles. A DTC code is five characters long.