What are the diagnostic codes on a Chevy Duramax?

Diagnostic trouble codes (or fault codes) are codes that are stored by the on-board computer diagnostic system. These are stored in response to a problem found in the truck by the system. Here is a list of Chevy Duramax diagnostic codes to help you in figuring out what is wrong with your vehicle.

How does the DPF work on a Duramax truck?

Take your Duramax-equipped truck out for an extended straight drive, such as on the highway. The DPF will fill up with soot during typical operation, such as stop-and-go driving. The DPF system will store soot during this type of operation, but the engine will not get hot enough to engage regeneration mode.

How often does my Chevy 2500HD exhaust go into Regen?

Apparently GM extended out the exhaust system warranty because of this. The DPF was fine until they added the DEF system and then the two didn’t play well together. Right now I am dealing with my DPF going into regen every 250 miles or so. Should be more like 450-600 like it was on my 2008 Sierra Duramax.

Why does DTC fail on a Duramax Diesel?

The engine control module (ECM) monitors the exhaust gas temperature (EGT) sensor 1 to determine if the operating temperature of the catalyst is achieved during a regeneration event. When the ECM detects that the DOC is not reaching a pre-determined temperature during an active regeneration event this DTC fails.

When did I get the Check Engine code for the DPF?

I knew it was only a matter of time for something to happen with the DPF, I got the code from the dealership when the check engine light came on at 101,576 miles. The ‘diesel guy’ wasn’t there but the tech seemed to think it was in need of re-gen, so I figure it’s something with the DPF.

Can a manual Regen be done on a Duramax?

Today I successfully completed a manual regen while my truck was at my house, pretty impressive and scary at the same time. My engine cranked up to 2500 rpm and went to town fixing my emissions control system. Shortly after completion, I went for a ride and I had restored power. The new Edge CTS II has a mode under diagnostics.

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 is the trouble code for a Chevy?

List of Chevy Trouble Codes (DTC) P0100 Mass or Volume Air Flow Circuit Malfunction. P0101 Mass or Volume Air Flow Circuit Range/Performance Problem. P0102 Mass or Volume Air Flow Circuit Low Input. P0103 Mass or Volume Air Flow Circuit High Input. P0104 Mass or Volume Air Flow Circuit Intermittent.

Are there any problems with the LLY Duramax?

LLY Duramax trucks don’t suffer from the same injector failure problems that LB7 trucks frequently had. Instead, many LLY Duramax problems stem from overheating. A new variable vane turbocharger and an EGR system were also added. Check out our LLY Duramax Specifications chart below for detailed information!

What is the compression ratio of a LLY Duramax?

LLY Duramax Specifications Chart Manufactured Years: 2004-2006 Compression Ratio: 17.5:1 (2004 & 2005) 16.8:1 (2006) Firing Order: 1-2-7-8-4-5-6-3 Turbocharger/Air: GARRETT GT3788VA VARIABLE VANE Turbochar Fuel Injection: Direct Injection High Pressure Common Ra

What is the engine code for a Duramax?

P2563 and P003A are common engine codes amongst 2004.5 to 2016 Duramax turbo engines which us variable geometry Garrett turbochargers. While not covered in my post, this tends to be a most common problem for LLY Duramax’s compared to later years.

What are the diagnostic parameters of a Duramax diesel engine?

2005 6.6L (LLY) Duramax Diesel ENGINE DIAGNOSTIC PARAMETERS SENSED PARAMETER FAULT CODE ACCEPTABLE OPERATING RANGE AND RATIONALITY PRIMARY MALFUNCTION DETECTION PARAMETERS SECONDARY MONITORING PARAMETERS AND CONDITIONS MONITORING TIME LENGTH AND FREQUENCY OF CHECK MONITORING METHOD FAULT CODE STORAGE AND MIL ILLUMINATION

What are the most common LLY Duramax engine problems?

The 6 Most Common LLY Duramax Problems. 1 1. LLY Bent Rods. While the LLY made competitive performance numbers back in 2004, the engine is certainly not competitive to the modern day diesels. 2 2. Head Gasket Failure – LLY Duramax. 3 3. EGR Valve Failure. 4 4. Glow Plug Failue – 2006 LLY Duramax. 5 5. Overheating in Pre-2006 Models.

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

Why is my Duramax diesel engine not working?

The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.

Where are the trouble codes stored on a Chevy truck?

Chevy/GM Duramax Diagnostic Trouble Codes (DTC) Diagnostic trouble codes (or fault codes) are codes that are stored by the on-board computer diagnostic system. These are stored in response to a problem found in the truck by the system.

What’s the ABS code on my Silverado 2500HD?

2005 2500HD 6.0 4×4. Using my scanning tool for the ABS I got the code C-201. No ABS or brake light on, just the check eng light. I did see somewhere that a service bulletin was issued for this problem and the fix was changing the ground wire mounting bolt on the module located on the frame under drivers seat. Anybody else hear of this fix.

What is the code on the Duramax fuel injector?

Low and behold, the P1249 had returned as it had numerous times before. But the only code displayed was a P0205, which indicated a circuit fault on #5 fuel injector. Working quickly before the cylinder heads warmed up, we removed the FICM connectors and repeated the pin test.

What are the DTC codes for Ford Mondeo?

P0102 Mass or Volume Air Flow Circuit Low Input P0103 Mass or Volume Air Flow Circuit High Input P0104 Mass or Volume Air Flow Circuit Intermittent P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

How many versions of the Duramax diesel engine are there?

All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Each version of the engine has its own issues and quirks, and some are less problematic than others.

What kind of transmission does a Duramax diesel use?

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

When did the LLY Duramax engine come out?

The LLY Duramax engine found on 2004-2006 Chevrolet/GMC HD trucks is the second generation of the Duramax line. It can last hundreds of thousands of miles, but it still has its fair share of issues. Thankfully, the LB7 injector problems were resolved, but some new problems revealed themselves.

Are there any major problems with the L5P duramax?

Mechanically, the L5P Duramax is stout and very few major problems have been reported. One common problem is with the MAP sensor however, as it tends to clog with soot and throw a check engine light, but a simple MAP sensor spacer and a can of electrical cleaner can get you back on the road worry free and prevent the soot from building up again.

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

When did the first Duramax V8 engine come out?

Duramax Engine LB7 2001 to 2004 The first Duramax V8 was introduced in 2001 and was given the code name LB7. The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency.

What does DTC stand for in OBD system?

DTC Meaning: What is a DTC code? Let’s start by explaining the DTC meaning first. DTC stands for Diagnostic Trouble Codes. A DTC code is a series of diagnostic trouble codes used by a vehicle’s onboard diagnostics (OBD) system to alert you when a vehicle experiences a malfunction.

When to clear a permanent diagnostic trouble code ( DTC )?

A Permanent Diagnostic Trouble Code (DTC) is stored when a DTC is confirmed and the Malfunction Indicator Lamp (MIL) has been illuminated. A Permanent DTC can only then be cleared by the module strategy and cannot be erased by clearing DTCs with a scan tool, a Keep-Alive Memory (KAM) reset, or battery disconnect.

What is the Allison Transmission Code for a Duramax?

My truck has 289K on it I’m second owner since 150K. My truck threw a code P0700 and P0735 after I had what seemed like a slip or clunk at around 55 to 60 mph and that’s when check engine light came on. I cleared the code with my EFI live and it hasn’t came back on again but it stills does it once in awhile.

When to set the trouble code p0700?

The TCM monitors the sensors and actuators relating to transmission control and communicates with the Engine Control Module (ECM) to inform it of any possible issues with the automatic transmission control module. The trouble code P0700 is set whenever the TCM detects a malfunction with the transmission controls.

What are the diagnostic codes on a Chevy Duramax?