AutoCodes – Volkswagen – P0235 Volkswagen

P0235 Volkswagen Code - Turbo/Super Charger Boost Sensor 'A' Circuit

Quick Answer

The boost pressure sensor responds to pressure changes in the intake manifold. Common causes include Boost pressure sensor harness is open or shorted, Boost pressure sensor circuit poor electrical connection, Faulty boost pressure sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0235 Volkswagen indicates Turbo/Super Charger Boost Sensor 'A' Circuit.
Common causes: Common causes include Boost pressure sensor harness is open or shorted, Boost pressure sensor circuit poor electrical connection, Faulty boost pressure sensor.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 14,631

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0235 Volkswagen Description

The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The Engine Control Module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The Engine Control Module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost pressure sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost pressure sensor. The ECM then compares the predicted value to the actual signal.

OBDII Code P0235 Volkswagen - Turbo/Super Charger Boost Sensor 'A' Circuit - AutoCodes.com — P0235 Volkswagen Code - Turbo/Super Charger Boost Sensor 'A' Circuit

What does this mean?

What are the Possible Causes of the DTC P0235 Volkswagen?

Boost pressure sensor harness is open or shorted
Boost pressure sensor circuit poor electrical connection
Faulty boost pressure sensor
Faulty Turbo/Super Charger
Engine over temperature
Ignition misfire exceeds the calibrated threshold
Faulty Knock sensor (KS)

How to Fix the DTC P0235 Volkswagen?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0235 Volkswagen code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0235 Volkswagen code?

Need more information on how to fix the P0235 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0235 Volkswagen code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0235 Volkswagen Code

1. What are the common symptoms of OBDII code P0235 in a Volkswagen related to the Turbo/Super Charger Boost Sensor 'A' Circuit?

The common symptoms include a lack of power or acceleration, engine hesitation, rough idling, and in some cases, the vehicle may go into "limp mode" to protect the engine.

2. What are the possible causes of the P0235 code in a Volkswagen?

Common causes of the P0235 code in a Volkswagen include a faulty boost sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning turbocharger, or a problem with the engine control module (ECM).

3. How can I diagnose the Turbo/Super Charger Boost Sensor 'A' Circuit issue in my Volkswagen?

Diagnosing the issue involves using a scan tool to read the OBDII code, checking the wiring and connectors for damage, testing the boost sensor for proper operation, and inspecting the turbocharger for any issues.

4. Can I continue driving my Volkswagen with the P0235 code present?

It is not recommended to drive your Volkswagen with the P0235 code present, as it can lead to further damage to the engine or the turbocharger. It is best to address the issue promptly to avoid more severe problems.

5. How can I repair the Turbo/Super Charger Boost Sensor 'A' Circuit issue in my Volkswagen?

Repairing the issue may involve replacing the boost sensor, repairing or replacing damaged wiring or connectors, addressing any turbocharger problems, and resetting the ECM to clear the code.

6. Will resetting the ECM clear the P0235 code in my Volkswagen?

Resetting the ECM may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to return. It's essential to diagnose and fix the root cause of the problem.

7. Can a dirty air filter cause the P0235 code in a Volkswagen?

A dirty air filter can restrict airflow to the engine, which may affect the turbocharger's performance and potentially trigger the P0235 code. Regularly changing the air filter is essential for optimal engine operation.

8. How do I prevent the P0235 code from recurring in my Volkswagen?

To prevent the P0235 code from recurring, it's crucial to maintain your vehicle regularly, including servicing the turbocharger, checking the boost sensor, and ensuring all wiring and connectors are in good condition.

9. Is the Turbo/Super Charger Boost Sensor 'A' Circuit issue covered under warranty for Volkswagen vehicles?

Depending on the age and mileage of your Volkswagen, the Turbo/Super Charger Boost Sensor 'A' Circuit issue may be covered under the manufacturer's warranty. Check with your Volkswagen dealership for specific warranty information.

10. Can a DIY enthusiast repair the Turbo/Super Charger Boost Sensor 'A' Circuit issue in a Volkswagen?

While some DIY enthusiasts may have the skills to diagnose and repair the Turbo/Super Charger Boost Sensor 'A' Circuit issue, it is recommended to consult a professional mechanic or Volkswagen specialist for complex issues to ensure proper diagnosis and repair.