W203 OM646 2359-001 Faulty
Could you help me about this problem ? From where i start to replace/repair
- Inspect for Boost Leaks: Check the entire intake system, including hoses, pipes, intercooler, and connections for any cracks, loose clamps, or leaks that could be causing the loss of boost pressure. A leak in the system before the turbocharger can significantly affect boost pressure.
- Inspect the Turbocharger: Assess the condition of the turbocharger itself. Look for any signs of damage, wear, or oil leaks around the turbo. Ensure that the wastegate is functioning properly and not stuck open or closed.
- Check Turbo-related Components: Inspect the actuator, vacuum lines, and control solenoids associated with the turbo system. Faulty actuators or solenoids can affect the turbo's performance and lead to low boost.
- Inspect Mass Air Flow (MAF) Sensor: A malfunctioning MAF sensor can cause incorrect air intake readings, affecting the turbo's performance. Ensure the MAF sensor is clean and functioning properly.
- Check for Clogged Air Filters: A clogged or dirty air filter can restrict airflow to the turbo, causing a decrease in boost pressure. Replace the air filter if it's dirty or clogged.
- Scan for Fault Codes: As you mentioned, using a full system scanner like the Youcanic scanner to read fault codes from all control modules is crucial. It might reveal additional codes or issues that are contributing to the low boost problem.
Last edited by Vin_16; Dec 14, 2023 at 10:11 AM. Reason: New info


