How to Fix P2262 Code In a 6.7 Cummins [Causes]
Engine codes mean problems, so when your 6.7 Cummins diesel engine is getting the P2262 code, you need to take steps.
But what does the P2262 code 6.7 Cummins mean?
The P2262 code means “the turbocharger boost pressure is not detected – mechanical failure.” This could mean there is a problem with the actuator, turbocharger boost pressure sensor, or a faulty connection between the ECM and the turbo or the ECM. There will be a loss of engine power and the truck will run erratically when this code appears.
Apart from this, there is still a lot more to uncover about this code. For example, how to diagnose the exact cause, the symptoms, and finally, what could be the solutions.
What Are the Causes and Symptoms of the P2262 Code?
|Electronic turbo actuator malfunction can cause P2262 code||Engine will lose power, internal engine damage, turbo vane may be stuck in full boost mode||Replace the actuator|
|A bad turbo boost pressure sensor||Loss of engine power and pressure||Clean or replace the sensor|
|Short or open return wire from the turbo to the ECM||Loss of engine power, ECM goes into failure management mode||Replace the wire|
|Problem with the ECM||Replace the ECM|
Usually, the code P2262 code means there is a problem with the turbocharger. But there can be more than one cause behind this problem.
Along with the check engine light and code P2262, you will experience reduced engine capabilities, no matter what the cause is.
How to Fix the P2262 Code In a 6.7 Cummins Diesel Engine?
When the P2262 code appears, it indicates a problem with quite a few components, which mainly include the turbocharger and the ECM. Let’s discuss the issues in detail and the possible solutions.
Reason One: Electronic Turbo Actuator Malfunction
When the VGT actuator drive gear is damaged or broken, this code will appear. The actuator is the part that converts electrical energy into kinetic energy. So, it makes sense that your engine will lose power when the actuator is not functioning like it’s supposed to.
To know for sure if your actuator is the problem, you will need to take it out and test it.
Step 1: Locate the VGT actuator. The actuator is located behind the front passenger wheel, right beside the turbocharger.
So, if you want to access the actuator, you’ll need to drain the coolant from your vehicle’s system, then remove the front passenger wheel.
Step 2: To remove the actuator, first remove the electrical connection, then unscrew the bolts to detach it.
Step 3: Test the actuator by connecting it to the turbo’s harness. Then have someone else turn the key on. When turned on, the gear on the actuator should move all the way to the left. When it’s turned off, the gear should move back into place to the right.
If this does not happen or the actuator makes a buzzing sound while moving, there is a problem with it.
Replace the actuator if it has gone bad. This is a very technical process, so we’d suggest you not replace it yourself if you don’t have the expertise. Here is a video that will show you the whole process:
It takes about an hour to change the actuator. The dealers would charge $3000-$4000 to fix the faulty actuator. If you have a warranty, it will save you some cost.
Reason Two: A Bad Turbo Boost Pressure Sensor
The turbo boost pressure sensor has the function of measuring the pressure or boost of the turbo. So, a non-functional boost pressure sensor could result in the P2262 code in your 6.7 Cummins.
The boost pressure sensor is located on the charge pipe. So, to check or test it, you will have to take it out and examine it.
When you do get it out, look for damage or see if it’s clogged.
If the sensor is clogged, clean it properly; if it’s damaged, just replace it with a new one. Here is the process-
- First, disconnect the battery.
- Locate the turbo boost pressure sensor. It is located in the intake manifold behind the air inlet.
- Disconnect the sensor by unscrewing the two screws. Using a torque socket quarter-inch ratchet and extension, take out the bolts.
- Ensure that no dirt or debris falls into the intake manifold.
- Now, use your hand to hold the pressure sensor and gently move it back and forth to lift it up out of the intake.
- Install the new sensor. Set it up on the O-ring, and twist and rotate it to get it into place.
- Put back the two bolts and connect the wiring harness.
Reason Three: ECM Return Wire from the Turbo is Open or Short
If the turbocharger actuator and the sensor are fine, then the connection between the turbocharger and the ECM must be checked.
The P2262 code means the ECM is detecting zero pressure from the turbo. So, if the turbo is fine, then that must mean there is something wrong with the connection.
To check the functionality of the connection, disconnect the wire from the ECM and check for continuity with a multimeter(our pick: AstroAI Multimeter). If that checks out, the wiring is fine.
If the problem is actually with the ECM wiring, then you must replace the faulty wire with a new one. Make sure to disconnect the battery before proceeding with the repair.
You need to remove the ECU from the vehicle and check the connection for fault. Disconnect the wire and change it to a new one.
Reason Four: Problems With the ECM
If all else fails, then only one problem remains, which is a faulty ECM. The ECM is the component that detects the issue and stores the code in its memory. So, if everything else is fine, this indicates a faulty ECM.
In this case, you will probably face a lot of issues with a lot of error codes. Also, this will have to be addressed as soon as possible.
Testing an ECM is complicated and requires special knowledge and experience. So, if you suspect that, you better contact a mechanic who can do that for you.
When you are sure you have a malfunctioning ECM, you must replace it. An OEM ECU can cost you 3000 dollars excluding labor, which could be another 500-1000 dollars. Aftermarket ECUs are comparatively cheaper, around 500-800 dollars.
If the P2262 Code Problem Still Doesn’t Solve
If the turbocharger sliding vane prevents the exhaust gas recirculation problem, your vehicle will need to be checked by the dealer.
Method 1: Manual Dessoting and Reflashing of the Program
The dealer will diagnose the issue and run a manual Dessoting and then reflash the truck. Reflashing will set the EGR functions to normal. The desolating process will help the carbon to declog the turbocharger.
Method 2: Turbocharger Cleaning Procedure
If it doesn’t work, the next method is to clean the carbon deposit in the turbocharger with a scan tool. For the VG turbocharger cleaning process, the engine has to idle at 1500rpm for five minutes.
Next, the turbocharger will be drilled and a cleaning solvent will be injected in the turbocharger to clear out the soot. If the cleaning solves the issue, the Powertrain Verification Test on the scan tool will show successful.
Method 3: Replacing the Turbocharger Assembly
If cleaning does not clear the P2262 code, the final method is to replace the turbocharger with a new one and reflash the program of the vehicle.
The 6.7 Cummins Turbocharger Maintenance
The turbocharger is a vital component of your 6.7L Cummins diesel engine. Like the other turbocharged engines, the 6.7L Cummins also needs extra care and maintenance, especially the turbo.
So, here are some tips on how to take care of a 6.7L Cummins turbocharger.
Turbocharged engines need quality engine oil to lubricate the compression valves, intake, and exhaust fans. This reduces wear and makes them work better. A turbocharger works best when the oil is changed every 5,000 miles.
Cold engine oil thickens, so it doesn’t flow as freely. As a result, moving parts are more prone to wear and tear until the oil has warmed up and thinned.
Go easy on the accelerator pedal when driving a cold truck to prevent unnecessary wear on the turbo and oil pump. Watch the oil gauge for when it reaches its optimum temperature before going full throttle.
Cool the Engine
A turbocharger produces a lot of heat while driving. If you turn off the engine right away, the residual heat will boil the oil. This will eventually cause a buildup of carbon particles that can lead to corrosion.
You can switch off the engine without cooking the oil by leaving it running for a few minutes after driving.
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What Problems Does The 6.7 Cummins Have?
Cummins 6.7L diesel engines face problems with the diesel particulate filters (DPF), head gaskets, and exhaust gas recirculation (EGR). For example, excessive white smoke from the exhaust, premature wear of the injector cups, failed fuel pump drive gears, oil leaks from the valve cover gasket, and failure of the VGT actuator.
Where Is The Boost Pressure Sensor Located?
The boost pressure sensor location varies based on the vehicle. But in a 6.7L Cummins diesel engine, the boost pressure is located on the charge pipe.
Do Turbos Require More Maintenance?
Yes, turbos require much more maintenance than vehicles that do not have them. Compared to non-turbocharged engines, turbocharged engines need more frequent oil changes and fresh spark plugs.
The P2262 code in 6.7 Cummins means “turbocharger boost pressure not detected – mechanical.” In this case, first, you must check the turbocharger actuator, then the sensor, and finally the wiring.
If everything else is fine, then the fault is in the ECM. In that case, it is best to consult with an expert.
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