AutoCodes – Ford – P0035 Ford

P0035 Ford Code - Turbocharger Bypass Valve 'A' Control Circuit High

Quick Answer

The Turbocharger Bypass (TCBY) Valve prevents backflow through the turbocharger when the throttle is rapidly closed to avoid undesirable noise. Common causes include Faulty Turbocharger Bypass (TCBY) Valve, Turbocharger Bypass Valve harness is open or shorted, Turbocharger Bypass Valve circuit poor electrical connection. 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: P0035 Ford indicates Turbocharger Bypass Valve 'A' Control Circuit High.
Common causes: Common causes include Faulty Turbocharger Bypass (TCBY) Valve, Turbocharger Bypass Valve harness is open or shorted, Turbocharger Bypass Valve circuit poor electrical connection.
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 2,628

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 Sep 01, 2023

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 P0035 Ford Description

The Turbocharger Bypass (TCBY) Valve prevents backflow through the turbocharger when the throttle is rapidly closed to avoid undesirable noise. The high pressure downstream of the turbocharger is vented back to the intake air upstream when the Turbocharger Bypass Valve is open reducing pressure in the system. This Diagnostic Trouble Code (DTC) is set when the Powertrain Control Module (PCM) detects an open circuit or high voltage in the Turbocharger Bypass Valve circuit.

OBDII Code P0035 Ford - Turbocharger Bypass Valve 'A' Control Circuit High - AutoCodes.com — P0035 Ford Code - Turbocharger Bypass Valve 'A' Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0035 Ford?

Faulty Turbocharger Bypass (TCBY) Valve
Turbocharger Bypass Valve harness is open or shorted
Turbocharger Bypass Valve circuit poor electrical connection

How to Fix the DTC P0035 Ford?

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 P0035 Ford 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 P0035 Ford code?

Need more information on how to fix the P0035 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0035 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

P0035 2015 Ford F150 — Turbocharger Bypass Valve 'A' Control Circuit High
P0035 2016 Ford F150 — Turbocharger Bypass Valve 'A' Control Circuit High
P0035 2017 Ford F150 — Turbocharger Bypass Valve 'A' Control Circuit High
P0035 2018 Ford F150 — Turbocharger Bypass Valve 'A' Control Circuit High
P0035 2019 Ford F150 — Turbocharger Bypass Valve 'A' Control Circuit High
P0035 2020 Ford F150 — Turbocharger Bypass Valve 'A' Control Circuit High

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 P0035 Ford Code

1. What does the OBDII code P0035 mean on a Ford vehicle?

P0035 indicates that the turbocharger bypass valve 'A' control circuit is reading a voltage or signal that is too high, suggesting an electrical or mechanical issue with the bypass valve system.

2. What are the common symptoms of code P0035 in a Ford?

Symptoms may include reduced engine performance, turbo lag, poor acceleration, a check engine light, and in some cases, unusual noises from the turbocharger.

3. What causes the P0035 code to appear on a Ford?

Common causes include a faulty turbocharger bypass valve, damaged wiring or connectors in the bypass valve circuit, a malfunctioning turbocharger, or issues with the vehicle's powertrain control module (PCM).

4. Can I drive my Ford with the P0035 code?

While the vehicle may still be drivable, continuing to drive with this code can lead to reduced performance and potential damage to the turbocharger or engine. It's best to address the issue promptly.

5. How is the P0035 code diagnosed?

Diagnosis involves checking the wiring and connectors for damage, testing the bypass valve for proper operation, inspecting the turbocharger system, and using a scan tool to monitor live data and confirm the fault.

6. How do I fix the P0035 code on my Ford?

Repairs may include replacing the turbocharger bypass valve, repairing or replacing damaged wiring or connectors, or addressing any issues with the turbocharger itself.

7. How much does it cost to repair the P0035 code on a Ford?

Repair costs can vary depending on the exact issue but typically range from $100 to $500, depending on whether it involves replacing the bypass valve or repairing wiring.

8. Can a dirty air filter cause the P0035 code?

While a dirty air filter is unlikely to directly cause the P0035 code, restricted airflow can negatively affect the turbocharger system, potentially leading to related issues.

9. Will clearing the P0035 code with a scan tool fix the problem?

Clearing the code will turn off the check engine light temporarily, but it won't fix the underlying issue. The code is likely to return until the problem is resolved.

10. Is code P0035 specific to Ford vehicles?

No, P0035 is a generic OBDII code that can appear on any vehicle with a turbocharged engine, but the exact causes and repair procedures may vary by make and model.