What Is the P226C Code on 6.7L Cummins & How to Fix It?

Code P226C indicates that the turbocharger boosts control “A” slow response. This could happen for several reasons, and you’ll need to figure out why this code was activated in your situation.

A restricted emission as a result of the turbo turbine being coupled to the engine and blocking it might cause low turbo boost control.

As a result, the engine is obliged to push harder against the exhaust, lowering the quantity of energy that can be transferred from the cylinders for generating engine power.

The P226C diagnostic code indicates a problem with the turbocharger boost control. The P226C code is summarized and clarified in the following sections.

What Does P226C Code Mean on Cummins?

P226C is an OBD-II generic code. The engine control module (ECM) monitors the variable geometry turbocharger electronic actuator and has detected a problem with the turbo control. The ECM then activates the Check Engine Light and stores the P226C code.

The Boost Pressure Actuator is a DC motor controlled by electricity that regulates the Turbocharger’s boost pressure output. The Boost Pressure Actuator is attached to the turbocharger assembly on the side.

The ASD circuit provides a 12-volt power supply to the Boost Pressure Actuator, and the Powertrain Control Module provides a duty-cycle control signal (PCM). Data is sent between the Boost Pressure Actuator and the PCM through CAN Bus lines.

Symptoms of Getting the P226C Code on Cummins

turbocharger slide ring

There are certain mechanical faults, such as slide rings binding on guide pins, and a few issues with housings cut improperly, causing the VGT turbocharger slide ring to jam within the housing.

Most turbochargers with mechanical or manufacturing issues are changed as a result of the “CHECK ENGINE” light going on and triggering the DTC P226C.

Therefore, a few of the symptoms of getting the P226C code are:

  • The Check Engine Light will illuminate, and the ECM memory will store the fault code P226C.
  • With little or no turbo boost, the engine will struggle to accelerate or operate well under load.
  • If the ECM enters failure management mode, the engine’s power may be lowered.

The Causing Factors of the Error Code P226C

The several causing factors of the P226C code are given below:

  • Through the CAN connection, electronic sensors on the turbocharger actuator monitor turbo vane position and send turbo vane position and boost amount feedback signals to the ECM.
  • An electronic turbocharger actuator.
  • A faulty turbocharger or clogged vanes.
  • An open or short on the turbo controller’s returning signal control wire to the ECM.
  • The ECM has a flaw or deficiency on the inside.

Read Also: What Is P2262 Code On Dodge Cummins?

How Serious Is Code P226C on Cummins?

The P226C turbocharger control code indicates that the turbo is damaged and should be replaced.

If the turbo vane is stuck in maximum boost mode, there will be no turbo boost, resulting in a loss of engine power and perhaps severe engine damage.

This might cause the engine to over-boost, which can be harmful.

The ECM will record the P226C error code in its memory if it detects a mechanical issue with the turbocharger sliding ring.

In addition to storing the fault code, the ECM will take a “Snap Shot” of all other sensor readings or data parameters at the moment the problem occurred and save it as a “Freeze Frame.”

Read Also: What Is P1193 Code on Dodge Cummins?

How to Solve the P226C Error Code on Cummins?

This error code, like the majority of others, requires the use of a basic code scanner to diagnose.

Cummins 6.7L Turbo Actuator Replacement

The Turbo Electronic Actuator has failed, according to the code P226C you have. The first code indicates that it is unable to detect boost pressure, while the second code indicates that it is unable to identify the turbine’s location.

The sensor collects this data and sends it to the PCM. A faulty sensor, broken wiring, or even a malfunctioning turbo are all things to look for.

The steps to resolving this issue are outlined below:

  1. Double-checking everything is the first step.
  2. When you see this code on your OBD 2, you should investigate it thoroughly. Monitoring should be carried out with care and zeal.
  3. If you make a mistake here, problem-solving will be difficult.
  4. Next, figure out what’s causing the problem.
  5. Sensors, hoses, filters, and an intercooler might all contain it.
  6. Depending on the nature of the situation, you must determine the following steps.
  7. This should be changed if the problem is with the Turbo Sensor.
  8. If you have no other option, purchase it.
  9. Replace the hoses if they are the source of the problem.
  10. Additional hoses are standard in most autos.
  11. Look at the turbo or compressor filter as well.
  12. Other problems with the turbo should be investigated. Because the issue is low air pressure, you should pay special attention to the airways. Make every effort to keep the airflow regular.
  13. Finally, do a re-scan on the engine. I’m hopeful that the problem has been rectified. If the code shows on the OBD 2 screen, see a local professional technician. There will be a greater need for manual and expert monitoring.

Read Also: What Is P2146 Code on Dodge Cummins?

What Repairs Can Fix the P226C Code?

  • The turbocharger control actuator component must be replaced.
  • The turbocharger assembly must be replaced.
  • Servicing or replacing a control actuators wire harness or connector

How Much Does It Cost to Solve the Error Code P226C?

In most circumstances, a simple do-it-yourself turbocharger pressure transducer adjustment would cost significantly less than $100.

It’s worth mentioning that most repair firms will require at least one hour of labor to replace this sensor, which might cost an additional $15 depending on where you reside.

Depending on the application, rebuilding or repairing a transmission might cost anywhere from $100 to several thousand dollars. Keep in mind that job opportunities in these settings vary widely, so look around for the greatest hourly income.

Due to the design and the amount of reprogramming of control units necessary, most vehicle repair shops charge between $80 and $160 per hour.

Read Also: What Is P2121 Code on Dodge Cummins?

Common Mistakes While Solving the P226C Code

The most common error in P226C code diagnosis is failing to follow the core problem in the code diagnostic procedure in the correct sequence.

Failure to monitor the procedure might result in additional fees, annoyance, and a misdiagnosis.

The following are examples of common solutions:

  • Before reviewing the freeze frame data for the major failure problem, clear the ECM memory codes so that the failure can be duplicated and repaired.
  • After the codes have been rectified, having failed to remove the ECM codes.
  • With a turbocharger problem, performing the soot cleaning out routine

Read Also: What Is P0603 Code On 6.0 Powerstroke?

Additional Comments to Consider Regarding the P226C Code

Code P226C might make an engine appear to have greater power than it has.

Although over boost may appear to be beneficial, it can cause the engine to burst holes in the pistons and head gaskets. If your car has an over-boost problem, don’t drive it until it’s fixed.

Make sure your vehicle’s engine is switched off if you want to undertake the repairs yourself. It’s never a smart idea to work on a reciprocating engine.

This will result in a potentially fatal situation.


Vehicles with the P226C code should not be driven since they may fail or become weak at any time. If the car loses power suddenly while traveling in traffic, it may cause an accident.

I hope our discussion today provided you with all of the information you required. When a Cummins’ P226C code was triggered, it was all over. Keep track of the code and try to resolve it as soon as feasible.

Consider all of my recommendations and, if necessary, seek expert assistance.

Similar Posts