AutoCodes – RAM – P226B RAM

P226B RAM Code - Turbocharger Boost Pressure Too High - Mechanical

Quick Answer

The Variable Geometry Turbocharger (VGT) adjusts turbocharger performance by moving the position of the impeller nozzle, on the high-pressure (engine exhaust gas) side of the turbocharger assembly. Common causes include Powertrain Control Module (PCM) calibration update, Soot build-up on turbocharger, Faulty Electronic Turbo Actuator. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P226B RAM indicates Turbocharger Boost Pressure Too High - Mechanical.
Common causes: Common causes include Powertrain Control Module (PCM) calibration update, Soot build-up on turbocharger, Faulty Electronic Turbo Actuator.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 208

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P226B RAM Description

The Variable Geometry Turbocharger (VGT) adjusts turbocharger performance by moving the position of the impeller nozzle, on the high-pressure (engine exhaust gas) side of the turbocharger assembly. The desired position of the actuator is commanded from the Powertrain Control Module (PCM). The actual position is sensed by the VGT and reported back to the PCM as feedback. Discrepancy in position feedback sent to the module, and commanded position sent to the VGT by more than a prescribed amount will result in failure of device rationality diagnostics. Failure to properly actuate the VGT will result in poor engine performance. The PCM lights the MIL lamp after the diagnostic runs and fails in two drive cycles. The PCM will turn off the MIL lamp immediately after this diagnostic runs and passes in four consecutive drive cycles. The Diagnostic Trouble Code (DTC) will be set when the turbo position is not within the commanded position during desoot or the difference between charge flow and charge flow command is over the calibrated limit.

OBDII Code P226B RAM - Turbocharger Boost Pressure Too High - Mechanical - AutoCodes.com — P226B RAM Code - Turbocharger Boost Pressure Too High - Mechanical

What does this mean?

What are the Possible Causes of the DTC P226B RAM?

Powertrain Control Module (PCM) calibration update
Soot build-up on turbocharger
Faulty Electronic Turbo Actuator
Faulty turbocharger

How to Fix the DTC P226B RAM?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P226B RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P226B RAM Code

1. What are the common symptoms of OBDII code P226B RAM (Turbocharger Boost Pressure Too High - Mechanical)?

The common symptoms include engine performance issues such as reduced power, hesitation during acceleration, and potential engine knocking or pinging noises.

2. What are the possible causes of OBDII code P226B RAM?

Possible causes of this code include a malfunctioning wastegate, a stuck or damaged turbocharger actuator, a boost pressure sensor failure, or a boost leak in the intake system.

3. How can I diagnose the cause of OBDII code P226B RAM?

Diagnosing the cause of this code typically involves inspecting the wastegate, turbocharger actuator, boost pressure sensor, and intake system for any signs of damage, leaks, or malfunctions. Using a scan tool to monitor boost pressure readings can also help pinpoint the issue.

4. Can driving with OBDII code P226B RAM cause further damage to my vehicle?

Continuing to drive with this code present can potentially cause damage to the turbocharger, engine components, and catalytic converter. It is recommended to address the issue promptly to prevent further damage.

5. How can I repair OBDII code P226B RAM?

Repairing this code may involve replacing the wastegate, turbocharger actuator, boost pressure sensor, or repairing any boost leaks in the intake system. It is recommended to follow the manufacturer's diagnostic and repair procedures.

6. Will resetting the OBDII code P226B RAM make it go away permanently?

Resetting the code without addressing the underlying issue will not fix the problem permanently. The code is likely to reappear until the root cause is diagnosed and repaired.

7. Can a clogged air filter cause OBDII code P226B RAM to trigger?

A clogged air filter can restrict airflow to the turbocharger, potentially leading to an increase in boost pressure and triggering the P226B code. It is advisable to check and replace the air filter if necessary.

8. Is it safe to drive with OBDII code P226B RAM temporarily?

While driving with this code may be possible for a short distance, it is not recommended for extended periods as it can lead to further damage to engine components. It is best to address the issue promptly.

9. Can extreme weather conditions trigger OBDII code P226B RAM?

Extreme weather conditions, such as high temperatures, can affect the performance of the turbocharger and its components, potentially leading to the triggering of the P226B code. Ensuring proper cooling and maintenance can help prevent this issue.

10. How long does it typically take to repair OBDII code P226B RAM?

The repair time for this code can vary depending on the specific cause of the issue and the availability of replacement parts. In general, the repair process can take a few hours to a full day, depending on the complexity of the repair needed.