What is the P0238 fault code What is the description of Turbocharger/Supercharger Pressure Sensor A Circuit High malfunction? How do you fix the P0238 fault code What are the symptoms and causes for the P0238 fault code
What is the P0238 Fault code? What does it signify?
P0238 is activated when the powertrain controller module (PCM), detects an out of-spec voltage signal from the turbo pressure sensor “A” circuit. This indicates an open or high voltage within the turbocharger A circuit. This code is general and valid for all turbocharged cars.
The manifold absolute (MAP) sensor is used by the PCM to monitor the pressure in the intake manifold. The PCM sends 5 volts to the MAP sensors, and the voltage signal from the MAP sensor back to the PCM varies according to the intake manifold pressure. The voltage signal increases if the intake manifold pressure rises. The PCM uses a pressure control solenoid in order to regulate the turbocharger’s boost pressure. It checks the turbo pressure sensor for correct turbo pressure. Maximum pressure is about 4.5 Volts. Zero boost pressure is equal to about 0.5 Volts. The P0238 fault code will be set if the PCM receives high voltage signals from the turbo pressure sensor, even though the turbo is off.
The P0238 fault code can affect vehicles of all makes and models, including but not limited to: Volkswagen, Dodge, Mercedes-Benz, Isuzu Chrysler, Dodge, Mercedes-Benz, Isuzu Chrysler, Nissan, Skoda Alfa Romeo Volvo, Ford Fiat, BMW Duramax Peugeot Honda, Audi, Hyundai. .
What is the P0238 Fault Code?
Below are some reasons to set fault code P0238:
- – Defective turbo pressure sensor
- – Defective MAP sensor
- – Corroded or damaged wiring or connectors, whether they are shorted or open.
- – Vacuum lines that are damaged or lost
- – Defective Wastegate
- – Defective PCM (rarely)
Clogged catalytic converters, and/or mufflers, can sometimes block exhaust gas flow, leading to excessive boost conditions at high engine speed.
What are the symptoms of the P0238 Fault Code?
You may experience the following symptoms if your vehicle has a P0238 code:
- – Illumination at the check engine lights
- – Significant decrease in engine performance
- – PCM may put the tool in safe mode, until the fault can be fixed
- Depending on the nature of your problem, you might hear hissing and/or whistling sounds.
- – The engine may not start or the knock sensor can be adjusted.
- Excessive smoke could come out of your exhaust pipe
- – Spark plugs can have a buildup of contaminants
How to Fix the P0238 Fault Code
The following repairs may be able to resolve the P0238 fault codes:
- – Replacing a defective turbo pressure sensor
- – If a short circuit is detected, repair the wiring harness.
- – Repair damaged connectors that cause short circuits or open loops
- – In the event that the PCM is damaged due to a short circuit it must be repaired.
What is the severity of the P0238 Fault Code
The possibility of the PCM burning out can occur if there is a short-term or long-term voltage drop in the sensor. This code must be dealt with immediately to prevent any damage to the catalytic converter or engine components.
