What is the latest version of the Duramax LML?

Duramax LML Specs & Info. The LML Duramax was released for 2011 model General Motors & Chevrolet HD trucks. The latest version of the 6.6L Duramax requires advanced emissions equipment, including the use of diesel exhaust fluid injection, to reduce nitrogen oxide emission levels by 63 percent over LMM powered trucks.

What is the diagnostic code for a Chevy Duramax?

Below are common check engine light trouble codes for the Chevy/GM Duramax diesel. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. Call us at 1-866-737-4966 with any questions you may have about your diesel.

What causes a p0208 engine light code?

The causes of a P0208 engine light code could be any of the following: Bad injector. This is usually the cause of this code but doesn’t rule out the possibility of one of the other causes. Open in the wiring to the injector. Short in the wiring to the injector.

What does p0208 mean on a PCM?

P0208 means that the PCM detected a fault in the injector or the wiring to the injector. It monitors the injector and when the injector is activated, the PCM expects to see the voltage pulled “low” or close to zero.

What kind of emissions does a 6.6L Duramax need?

The latest version of the 6.6L Duramax requires advanced emissions equipment, including the use of diesel exhaust fluid injection, to reduce nitrogen oxide emission levels by 63 percent over LMM powered trucks.

What makes a Chevy Duramax LML-Diesel Break?

In order to produce such high pressure inside the fuel rail, the internal parts of the CP4 are machined to a very precise and tight tolerance and diesel fuel is the only lubricant the moving parts have, which is the root of the problem.

Can you change oil on a 6.6L Duramax?

Otherwise, the normal LML Duramax service schedule is just fine. When swapping filters or changing the oil on your 6.6L LML Duramax you need to use parts that meet or exceed OEM specifications. I recommend using OEM parts from GM or ACDelco.

Why was the LML added to the 6.6L Duramax?

However, the LML was actually the biggest overhaul Duramax had done to the 6.6, claiming to use nearly 60% of freshly designed parts not used in previous version. Frequent across all diesel engine manufacturers, the engine update was primarily driven by increasing diesel emission standards.

Are there any problems with the Duramax engine?

The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.

Which is the highest power producing Duramax engine?

At 400hp and 765tq, the LML is also the highest power producing Duramax made to-date, up until the L5P. Because the LML had some major changes, I want to briefly cover its differences compared to the LMM. First, the engine received a strengthened block and improved main bearing to improve on previous weaknesses.

What does selective catalytic reduction do to a Duramax LML engine?

This removed the oil dilution issues with the LMM engine and increased the regeneration intervals. Selective catalytic reduction was added to the engine, which injects a special fluid, known as diesel exhaust fluid into the exhaust system.

How does the LML Duramax SCR system work?

LML Duramax DEF. The LML Duramax is equipped with a SCR system that requires the use of DEF (diesel exhaust fluid). DEF is injected into the exhaust stream where a chemical reaction occurs that reduces NOx emissions.

Why does the Duramax LML use diesel exhaust fluid?

The implementation of the SCR system, which requires a constant supply of diesel exhaust fluid (DEF), was met with heavy scrutiny. However, this technology actually allows for an advantageous engine calibration to be executed, reducing the duty cycle of DPF regenerations and providing significant improvements in fuel economy.

Why was the 9th injector introduced in the Duramax LML?

The Duramax LML introduced the “9th injector” system in order to supply fuel to the DPF during regeneration. This is opposed to the previous generation’s (LML) late/post injection technique.

What causes a Duramax LML engine to die?

Small aluminum bits can shave off of the internals of the pump and then get circulated through the whole fuel delivery system. The fuel rail, the injectors, fuel lines, etc. all will have metal shavings circulating throughout. Once this happens, the fuel pump will fully die, leaving your engine starving of fuel.

Where does the DPF go in a Duramax LML engine?

The DPF regeneration process was overhauled by adding a 9th injector in front of the diesel oxidation cat which is located within the turbo downpipe. The 9th injector receives fuel from the CP4.2 and injects it directly into the exhaust system. This removed the oil dilution issues with the LMM engine and increased the regeneration intervals.

When did the Duramax LML diesel engine come out?

Following the short lived LLY engine, the Duramax LML was introduced in 2011. Featured in the same 2500 and 3500 HD work trucks, the LML sported the same 6.6L turbo-diesel design that Chevy diesel trucks have been using since 2001.

How to identify your Duramax diesel engine code?

Because multiple versions of the Duramax were available in some years, knowing the engine code of your Chevy Silverado or GMC Sierra will make it much easier to ensure you get the correct parts the first time. You can either look it up by application or check the 8 th digit of your truck’s VIN to confirm. Duramax Diesel engine RPO codes include:

How many miles on a Chevy Duramax LML?

With a little digging, it’s clear there have been some CP4 failures with as little as 30,000 miles on the clock, but at the other end of the spectrum, some have logged over 700,000 miles on their LML with the original injection pump still running strong.