The P0249: Turbocharger Wastegate Solenoid B Low code refers to an issue where the voltage in the circuit for the wastegate solenoid B is lower than expected. The wastegate solenoid B is responsible for controlling the wastegate, which regulates the turbocharger’s boost pressure. A low voltage condition could result from a faulty solenoid, wiring issues, or a problem with the Powertrain Control Module (PCM). When this code is triggered, it suggests that the wastegate may not be operating correctly, which can impact engine performance.
P0249 – Quick Overview
| Meaning | P0249: Turbocharger Wastegate Solenoid B Low |
| Is it serious? | Yes, this code can be serious as low voltage in the solenoid circuit may cause improper turbocharger operation, leading to reduced engine performance or potential engine damage. |
| Possible causes | – Low voltage in the wastegate solenoid B circuit – Faulty wastegate solenoid B – Wiring or connector issues – Faulty PCM |
| How to diagnose? | – Measure the voltage in the wastegate solenoid B circuit. – Inspect the solenoid for proper operation. – Check wiring and connectors for defects. – Replace or repair any faulty components. |
P0249 Meaning
The P0249: Turbocharger Wastegate Solenoid B Low code indicates that the voltage in the circuit for the wastegate solenoid B is lower than it should be. This condition can result in improper control of the turbocharger’s wastegate, which regulates the boost pressure. The low voltage could be due to a problem with the solenoid itself, wiring issues, or a malfunctioning PCM.
Step-by-step diagnostic guide
Follow the outlined procedure to diagnose this DTC by eliminating possible causes one by one.
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check if there are any other related codes present. These might give additional clues about the problem. | OBD-II Scanner |
| Inspect the Wastegate Solenoid B | Visually inspect the wastegate solenoid B for any signs of damage, corrosion, or disconnection. Ensure it is securely attached and functioning properly. | Flashlight, Safety Gloves |
| Measure Voltage in the Circuit | Use a multimeter to measure the voltage in the wastegate solenoid B circuit. Compare the readings to the manufacturer’s specifications to determine if the voltage is too low. | Multimeter, Manufacturer’s Specifications |
| Inspect Wiring and Connectors | Carefully check the wiring and connectors leading to the wastegate solenoid B for any signs of wear, corrosion, or breaks. Look for loose or disconnected wires that could cause low voltage. | Flashlight, Multimeter |
| Repair or Replace Damaged Wiring/Connectors | If any wiring or connectors are damaged, shorted, or corroded, repair or replace them. Ensure all connections are secure and free from contaminants. | Wire Strippers, Electrical Tape, Replacement Wires/Connectors |
| Check the PCM (Powertrain Control Module) | Inspect the PCM and its connections for any signs of damage or loose connections. If the PCM is suspected to be faulty and causing low voltage, it may need reprogramming or replacement. | OBD-II Scanner, Multimeter |
| Clear the Code and Test Drive | After completing the necessary repairs, clear the P0249 code using the OBD-II scanner. Take the vehicle for a test drive to ensure the issue is resolved and the code does not return. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P0249 code has not reappeared. If the code returns, further diagnosis may be required. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko