The P0235 OBD-II code refers to the Turbocharger/Supercharger Boost Sensor “A” Circuit. This code is triggered when the Powertrain Control Module (PCM) detects an incorrect signal from the boost pressure sensor, which measures the amount of boost pressure being created by the turbocharger or supercharger.
What Does the P0235 Code Mean?
When the PCM sets the P0235 code, it indicates that there is a problem with the Turbocharger/Supercharger Boost Sensor “A” Circuit. This could mean that the sensor is malfunctioning or that there is an issue within the circuit itself, impacting the engine’s ability to measure and respond to boost pressure effectively.
What Causes the P0235 Code?
- Boost Pressure Sensor failure
- Wiring issues, such as shorts or breaks
- Powertrain Control Module (PCM) failure
- Turbocharger or supercharger failure
- Exhaust leaks that affect pressure readings
What Are the Symptoms of the P0235 Code?
- Decreased engine performance
- Increased fuel consumption
- Lack of boost from the turbo or supercharger
How Serious Is the P0235 Code?
The P0235 code is considered urgent. Immediate action is necessary as it can lead to significant malfunctions that may cause severe damage to the engine or pose safety risks for the driver and passengers. Ignoring this code could result in more extensive repairs and greater costs down the line.
How to Diagnose the P0235 Code
Diagnosing the P0235 code involves a thorough inspection of the vehicle’s boost pressure sensor and related components. Here are the steps typically followed:
- Use an OBD-II scanner to confirm the presence of the P0235 code.
- Inspect the wiring and connectors for damage or corrosion.
- Test the boost pressure sensor for proper operation.
- Check for vacuum leaks or exhaust leaks that could affect the sensor.
- Verify the operation of the turbocharger or supercharger.
Common Repairs for the P0235 Code
- Replacing the boost pressure sensor
- Repairing or replacing damaged wiring or connectors
- Repairing any identified exhaust leaks
- Replacing or repairing the PCM if it is found to be faulty
- Fixing turbocharger or supercharger issues
How Much Does It Cost to Fix the P0235 Code?
The cost to fix the P0235 code can vary significantly based on the underlying issue. On average, repairs can range from $100 to $1,000. For example, sensor replacement might cost around $100-$300, while more complex issues involving the turbocharger or PCM could lead to higher repair bills.
Can I Fix the P0235 Code Myself?
While some experienced DIY mechanics may be able to troubleshoot and replace the boost pressure sensor or repair wiring, it is recommended to consult a professional mechanic for proper diagnosis and repair. The complexity of the problem and the risk of further damage makes professional intervention advisable.
