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 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.

What is the RPO code for a Duramax Diesel?

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: Applications: 2001-Early 2004 Chevy Silverado and GMC Sierra, 2001-2005 Chevy Kodiak and GMC TopKick Details: First version of the Duramax diesel.

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.

When to set DTCs for Duramax diesel engine?

Several injector timing-related DTCs may be set along with an illuminated Check Engine light on some 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P).

Are there any problems with the LLY Duramax?

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.

What is the resistance of a Duramax injector circuit?

The specified resistance at room temperature is between 0.3 to 0.4 ohms. Before measuring the resistance of any circuit, remove the negative cable on each battery. Since .3 ohms is a very small resistance, the ohmmeter leads must be clean and the meter must be perfectly “zeroed” by crossing the leads and pushing the “relative” button.

What causes a Duramax injection pump to fail?

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

How much does it cost to replace a Duramax injector?

The recommended resale from my supplier on these remanufactured injectors is about $1,600 for the set of four. Replacing all four injectors required removing both right- and left-bank rocker arm covers and the overlay of wiring harnesses and ducting covering of each.

How is resistance measured on a Duramax injector?

Since .3 ohms is a very small resistance, the ohmmeter leads must be clean and the meter must be perfectly “zeroed” by crossing the leads and pushing the “relative” button. If the ohmmeter doesn’t have the “rel” feature, jot down the leads’ resistance and subtract that from the total reading when measuring circuit resistance.

Where are the injector quantity adjustment codes located?

The teach-in adjustments ensure a constant level of emissions in the lower end, part load range, for the service life of the vehicle. Injector Quantity Adjustment codes are located in different locations on the injectors.

How much does a Duramax injector circuit cost?

The wiring on the injectors is very simple: One wire powers the injector while the FICM fires the injector by grounding the other. The recommended resale from my supplier on these remanufactured injectors is about $1,600 for the set of four.

How does injector quantity adjustment code for Oregon fuel work?

This works by injecting a small amount of fuel into one cylinder during overrun conditions (on deceleration). The wheel speed sensor detects the resulting torque increase as a minor dynamic change in engine speed. The increase in torque is imperceptible to the driver, but is clearly linked to the injected fuel quantity.

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.

Are there any problems with the Duramax diesel engine?

Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

What causes a Duramax to overheat in the summer?

Overheating typically occurs while towing in the Summer months, and is most prevalent in 2005 or earlier models (2006+ models received a larger radiator and fan). Overheating often occurs as a result of a fan clutch failure, preventing the engine fan from providing supplemental airflow as necessary to keep the engine from overheating.

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.

Are there any flaws in the Cummins Duramax?

Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic. For example, did you know the injection pump on the LML version is prone to coming apart and wrecking the entire high-pressure fuel system when it does?

How long does it take to replace a Duramax injector?

Replacing all four injectors required removing both right- and left-bank rocker arm covers and the overlay of wiring harnesses and ducting covering of each. Quoting from one source, the labor time for removing and replacing both covers is about 9.2 hours for “severe service” cases.

Is it easy to do pinpoint diagnostics on a Duramax?

Sure, it’s easy to talk about pinpoint diagnostics, but with the fourth pin-out on the FICM C1 and C2 connectors yielding the same results, I really didn’t have any place to go with the diagnostics except to replace the FICM as recommended by service information.

Can a lab scope test a fuel injector circuit?

Since the FICM disables the electrical circuits of all four injectors in each group, testing the injector circuits with a lab scope is a waste of time. According to service information, the correct diagnostic procedure is to use a professional volt/ohmmeter to measure the resistance of each fuel injector circuit.

What’s the resistance of a fuel injector circuit?

According to service information, the correct diagnostic procedure is to use a professional volt/ohmmeter to measure the resistance of each fuel injector circuit. The specified resistance at room temperature is between 0.3 to 0.4 ohms.

Where is the fuel injection control module located?

An underhood inspection revealed that the previous shop that had worked on the car disconnected several wiring harnesses and had broken open the plastic loom cover to the Fuel Injection Control Module (FICM), which is bolted to the passenger-side valve cover.

How to troubleshoot fault code 27 with engine light?

The 27 code indicates the injector circuit is not syncing with the input signal. How do I trouble shoot this? You need either a digital storage oscilloscope or a noid light to test signal from the PCM to the injectors. If you don’t have a DSO you will also need a multi-meter.

What is the code for an injector circuit malfunction?

The code P0200 is set when the electronic control module detects sensor performance that is out of the range for either the voltage or the resistance within the injector circuit. The ECM can trigger the failsafe mode to prevent any issues in order to prevent damage, and this will continue happening until the error code is fixed.

What does code 27 mean on Jeep Cherokee?

I own a ’94 jeep cherokee 4.0 liter. The 27 code indicates the injector circuit is not syncing with the input signal. How do I trouble shoot this? did you do the flashing light trick off the dash to get this code? – DucatiKiller Jan 21 ’16 at 23:53 I don’t see your code 27 lining up with what you say it does.

Where is the fuel injector error code stored?

Basically, this code only ever gets stored on the Powertrain Control Module of diesel engines. This code indicates that the vehicle´s PCM has detected an inconsistency between the electronic fuel control actuator´s signal voltage that was sent out and the one returned by the fuel metering sensor control.

Why are the Pistons on my Duramax not working?

Low-quality castings from its suppliers and a reduced amount of meat present in the wrist pin area (thanks to the use of wrist pin bushings) are to blame for factory piston failure. In most cases, the cast-aluminum piston cracks along the center line of the wrist pin, as shown above.

Are there any problems with the Commons 6.6L Duramax Diesel?

Common Problems with the 6.6L Duramax Diesel. The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.

What was the problem with the LBZ Duramax in 2006?

Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years. The concern was that the glow plug module would over cycle the glow plugs, creating a scenario in which the tip of the glow plug could actually deform and/or break off in the engine.

Are there any problems with the Duramax fuel pump?

It can also be relatively difficult to prime the fuel system once air has been introduced into the system, such as when the fuel filter is changed. The 2001 to 2004 LB7 fuel filter housings seem to be the most prone to problems. Water pump failures for Duramax engine are somewhat common.

Why did my GMC injectors have to be replaced?

A red flag went up in the owner’s mind because the GMC had been bought from a private owner who claimed that all eight injectors had been replaced prior to the sale. The current owner called a mutual friend of ours who works as a heavy-duty mechanic for a local construction company.

When to submit a repair order for a 2003 Duramax?

Claims with repair orders prior to May 25, 2004 must be submitted to the Service Contract provider. For 2003 vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after October 10, 2006 are covered by this special policy and must be submitted using the labor operation codes provided with this bulletin.

How long can a Duramax go out of service?

This special policy covers the condition described above for a period of 7 years or 200,000 miles (320,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. The repairs will be made at no charge to the customer.

Are there any problems with my 2003 Duramax?

Thaks for the help. injectors,water pump,headgaskets,injectors again,instrument cluster,steering shaft,pinion seal,and injectors again. I have on 03 with 66,000 on it and know problems. Friend of mine has 03 asmost same truck and know problems with 145,000 on it. Sure love mine. P:S Injectors should be warrantied to 200,000.

What is the code on the Duramax fuel injector?