How to Fix the P2610 DTC Code On Duramax (Expert Advice)

Consider your truck with a Duramax engine that suddenly illuminates the Check Engine Light. It can be terrifying for you if you do not know how to tackle it. A diagnostic trouble code (DTC) narrows down to the specific engine problem your truck is experiencing.

The DTC P2610 shows issues in the Duramax internal engine off-timer performance. In this case, the ECM or the PCM fails to monitor whether the engine is running or not. More precisely, the timer inside the ECM can be faulty, which results in an inaccurate record of the engine’s running time.

Nothing to worry about if you are new to facing DTC P2610. Reading this article will enlighten you about the symptoms, causes, and possible and practical fixes to get rid of P2610 in Duramax.

P2610 DTC Code On Duramax

What Does the P2610 Code Mean on Duramax?

When the Engine Control Module (ECM) fails to record the timing of the engine shut down, it sets DTC P2610.

Breaking down the DTC P2610, we get:

  • P = Powertrain, the system of components that propels your car forward.
  • 2 = Manufacturer Specific Code
  • 6 = Engine Control Module (ECM)
  • 10 = Specific fault index (In our case, false data from Internal Engine Off-timer)

In P2610, the ECM fails to provide the essential data about the drive cycle; the engine is turned on/off to the PCM. It may happen if the timer does not work or ECM cannot retrieve the data from the timer.

It cannot send back essential data to the fuel injection system. As a result, a false report about fuel delivery and transmission timing is observed.

How Serious Is P2610 Code On Duramax?

The latest model of Duramax engines is highly reliable on the auxiliary computer embedded within it. Its performance depends upon the data sent and received from the ECM.

Since P2610 in Duramax specifically denotes an issue of miscommunication between the ECM and the off-timer, the future outcome can be severe for the engine.

The engine shutdown timing and duration are crucial to recording the ignition timing and drive cycle.

Not fixing the issue cause degradation in the drivability, fuel efficiency, power delivery, and transmission problem of the engine. Thus, the P2610 code for Duramax is severe and should be fixed as soon as it is diagnosed.

What Causes The P2610 Code On Duramax?

The DTC P2610 can happen for many different reasons embedded within the off-timer control of the engine controller. Knowing the causes of such incidents is better to avoid making the same mistake in the future.

Primary Causes

  • Damage to the off-timer sensor
  • Faulty Crankshaft Position Sensor (CPS)
  • A programming defect or damage in the Engine Control Module (ECM)
  • Broken or shorted wirings of the ECM.
  • Damage in the metallic connectors of ECM/PCM
  • Connection calibration issue of the ECM

How To Fix P2610 Code On Duramax?

Fixing the DTC P2610 in Duramax as soon as possible is essential as it may lead to further engine damage if left untreated. There are two types of solutions for the DTC P2610.

These are software and hardware-based solution. Before initiating any solution, it is crucial to do a thorough scanning to confirm the problem.

Step 1: Using the OBD-II Scanner

Take a diesel engine compatible OBD-II scanner and connect it to the main module of the truck. You will find the connecting port below the dashboard. In some truck models, you can find it beside the gas pedal.

Do a complete scanning of the truck and store the freeze frame data. If any secondary codes appear related to P2610, they should be fixed before getting into the main issue. Write down or save the freeze frame data for further usage.

You should also check the Technical Service Bulletins(TSB) for your truck, as P2610 is a Manufacturer-specific issue. It will help you understand whether reprogramming in the ECM is required.

Step 2: Inspecting the Crankshaft Position Sensor (CPS) and Engine RPM

Keep the OBD-Ii scanner connected live in your truck and drive around for a while. Keep an eye on the data stream display to check the CPS and engine RPM.

Noticing a different value other than Zero in the RPM data means the CPS is faulty or wiring is shorted, which requires replacement.

Step 3: Inspecting Engine Primary Coil Voltage

Connect a Digital voltmeter/ohmmeter(DVOM) or a Multimeter to the primary coil. Check the initial voltage when the engine is turned off. Generally, the reading should be 0, but if the coil has a shorted wiring, it will show voltage above 5 Volts.

Step 4: Calibration of the ECM

It is an easy troubleshooting process and can be done by yourself. At first, switch off the engine for 90 seconds and open up the connectors from the ECM.

After 90 seconds, reassemble the connections and keep the engine on; use tech2 to reset the codes of the ECM.

Step 5: Replacing ECM/PCM

You may need to replace the entire ECM/PCM as a last resort. This is an expensive procedure because a new ECM/PCM costs a lot. You must ensure after the replacement, all the systems have been reset to the initial condition.

Other Symptoms Of Getting P2610 Code On Duramax

Since P2610 in Duramax is an auxiliary computer issue, no major symptoms will be seen in engine performance.

You can use the below-stated symptoms to track the issue and save some bucks from the initial diagnosis.

  • Check Engine Light will turn On in the instrumental panel.
  • ECM fails to clear the internal emission monitor.
  • Truck declines in emission testing due to lack of drive cycle data
  • Decreased fuel economy, engine performance, or vehicle driveability.

How Much Does It Cost To Fix Duramax P2610 Code?

Various types of fixes are available for the P2610 error code of Duramax. The complete initial diagnosis may cost you $75 to $150, depending on the workshop type and location.

To replace the Duramax ECM, you must pay more than $500. The actual price depends upon the engine model and making year.

Can You Drive Your Duramax With Code P2610?

You can quickly drive your truck with the P2610 in the background. The P2610 code does not cause performance or driveability problems in the Duramax engine.

Although it can be problematic if a cop catches you driving a vehicle with a check engine light, and you need to pay a fine. Hence it is recommended to drive the truck on the road unless you are taking it to a workshop for a fix.


This article has presented you with all the possible symptoms, causes, and fixes for the DTC P2610 in Duramax. We hope it will be helpful for you to make a decision about your truck and how to fix it.

You can first use the in-home diagnosis and treatment to eliminate the minor issues.

Besides, if the fixes work, you can save a lot of money to be paid as a service charge. But it is recommended to seek a professional’s help for advanced troubleshooting.

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