p226d turbocharger supercharger boost control a range performance problem
P226D Turbocharger/Supercharger Boost Control “A” Range/Performance Problem
- Code: P226D
- Description: Turbocharger/Supercharger Boost Control “A” Range/Performance Problem
- Definition: This code indicates that the Engine Control Module (ECM) has detected a problem with the boost pressure control system, specifically in the range or performance of turbocharger/supercharger boost control “A”. The ECM monitors the boost pressure and compares it to expected values. If there is a discrepancy, this code is triggered.
p226d – Turbocharger/Supercharger Boost Control A Range/Performance Problem
Typical Severity: Moderate
Common Causes
p226d – Turbocharger/Supercharger Boost Control A Range/Performance Problem
Common causes:
- Boost leak in the intake system
- Faulty turbocharger wastegate
- Worn or damaged turbocharger components
- Dirty or clogged air filter
- Faulty boost pressure sensor
Common Misdiagnosis
OBD2 Code: P226D
Description: Turbocharger/Supercharger Boost Control “A” Range/Performance Problem
Common Misdiagnosis: Replacing the turbocharger or supercharger without checking for boost leaks, faulty sensors, or issues with the wastegate actuator.
Common Diagnostic Steps
OBD2 Code: P226D
Description: Turbocharger/Supercharger Boost Control “A” Range/Performance Problem
- Check for any additional trouble codes that may be present and address those first.
- Inspect the turbocharger/supercharger boost control solenoid for proper operation and connectivity.
- Examine all vacuum lines and hoses connected to the turbocharger/supercharger system for leaks, cracks, or disconnections.
- Test the wastegate actuator for proper movement and ensure it is not sticking or binding.
- Verify that the MAP (Manifold Absolute Pressure) sensor is functioning correctly by checking its voltage output against specifications.
- Inspect the intake air system for obstructions or restrictions that could affect airflow to the turbocharger/supercharger.
- Ensure there are no exhaust leaks before the turbocharger that could affect boost pressure readings.
- If equipped, check the intercooler for blockages or damage that could impact performance.
- Perform a visual inspection of all electrical connections related to the boost control system for corrosion or loose connections.
- If necessary, use a scan tool to perform an active test of the boost control solenoid to verify its functionality under different conditions.