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P0029 Subaru Code - Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2

Quick Answer

The P0029 Subaru code refers to a malfunction in the exhaust valve control solenoid circuit in Bank 2 of the vehicle's engine. Common causes include Faulty Solenoid: The exhaust valve control solenoid itself may be defective, causing the circuit to malfunction, Wiring Issues: Damaged or corroded wiring in the exhaust valve control solenoid circuit can disrupt the electrical signals, Clogged EGR Valve: A clogged EGR valve can restrict the flow of exhaust gases, affecting the performance of the solenoid. 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
P0029 Subaru indicates Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2.
Common causes
Common causes include Faulty Solenoid: The exhaust valve control solenoid itself may be defective, causing the circuit to malfunction, Wiring Issues: Damaged or corroded wiring in the exhaust valve control solenoid circuit can disrupt the electrical signals, Clogged EGR Valve: A clogged EGR valve can restrict the flow of exhaust gases, affecting the performance of the solenoid.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0029 Subaru Description

The P0029 Subaru code refers to a malfunction in the exhaust valve control solenoid circuit in Bank 2 of the vehicle's engine. This code indicates that there is an issue with the performance or range of the exhaust valve control solenoid, which is responsible for controlling the flow of exhaust gases from the engine.

OBDII Code P0029 Subaru - Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2
P0029 Subaru Code - Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2

Common Causes of P0029 Subaru

  1. Faulty Solenoid: The exhaust valve control solenoid itself may be defective, causing the circuit to malfunction.
  2. Wiring Issues: Damaged or corroded wiring in the exhaust valve control solenoid circuit can disrupt the electrical signals.
  3. Clogged EGR Valve: A clogged EGR valve can restrict the flow of exhaust gases, affecting the performance of the solenoid.
  4. ECM Malfunction: A malfunctioning engine control module (ECM) may not be sending the correct signals to the exhaust valve control solenoid.
  5. Vacuum Leaks: Vacuum leaks in the EGR system can also cause the exhaust valve control solenoid circuit to perform improperly.

Symptoms of P0029 Subaru

  1. Check Engine Light: The most common symptom associated with the P0029 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Rough Idle: The engine may experience rough idling or stalling when the exhaust valve control solenoid circuit is malfunctioning.
  3. Reduced Fuel Efficiency: A decrease in fuel efficiency may occur due to improper exhaust gas recirculation.
  4. Engine Misfires: The engine may misfire or hesitate during acceleration, leading to a lack of power.
  5. Emission Issues: The vehicle may produce higher emissions than normal, potentially causing it to fail emissions tests.

How to Fix P0029 Subaru

  1. Diagnose the Issue: Use a scan tool to retrieve the fault code and inspect the exhaust valve control solenoid circuit and components for any visible damage.
  2. Replace the Solenoid: If the solenoid is faulty, replace it with a new one to restore proper function.
  3. Repair Wiring: Repair or replace any damaged wiring in the exhaust valve control solenoid circuit to ensure proper electrical connections.
  4. Clean or Replace EGR Valve: Clean or replace the EGR valve if it is clogged to allow for proper exhaust gas recirculation.
  5. Reset the ECM: After completing the repairs, reset the engine control module to clear the fault code and turn off the check engine light.

Cost to Fix P0029 Subaru

The typical repair costs for addressing the P0029 Subaru code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of replacing the exhaust valve control solenoid can range from $150 to $300, including parts and labor. Additional costs may be incurred if wiring repairs or EGR valve replacement are necessary.

When is the Code Detected?

ECM monitors OCV stuck while cam signal is normally generating and Valve cleaning is not in progress.If the CAM Acutal Position is too high or low and Difference between Cam Actual Positionand Desired Position is higher than 20° ECM determines that a fault exists and the P0029 codes is set.

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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 P0029 Subaru Code

What does the OBDII code P0029 mean on a Subaru?

P0029 indicates an issue with the Exhaust Valve Control Solenoid Circuit Range/Performance in Bank 2, meaning the ECU has detected improper performance or a fault in the circuit controlling the exhaust valve timing.

What are the common symptoms of P0029 on a Subaru?

Symptoms may include poor engine performance, rough idling, reduced fuel efficiency, hesitation during acceleration, or the Check Engine Light being illuminated.

What causes the P0029 code to appear on a Subaru?

Common causes include a faulty exhaust valve control solenoid, wiring issues like damaged or corroded connectors, low or contaminated engine oil, or a malfunctioning ECU.

Can low oil levels trigger the P0029 code?

Yes, low or dirty engine oil can impair the operation of the exhaust valve control solenoid, potentially triggering the P0029 code.

How do I diagnose the P0029 code on a Subaru?

Start by checking the engine oil level and condition, inspecting the wiring and connectors for damage, and testing the exhaust valve control solenoid for proper function using a multimeter.

Can I drive my Subaru with the P0029 code active?

It’s not recommended to drive for extended periods with this code, as it can lead to poor engine performance and potentially cause further damage to engine components.

How do I fix the P0029 code on a Subaru?

Repairs may include replacing the exhaust valve control solenoid, repairing damaged wiring, cleaning or replacing corroded connectors, or performing an oil change if the oil is dirty or low.

How much does it cost to repair the P0029 code on a Subaru?

Repair costs can vary widely, but replacing the exhaust valve control solenoid typically costs between $150 and $350, including parts and labor.

What tools are needed to fix the P0029 code on a Subaru?

You may need an OBDII scanner, a multimeter for electrical testing, basic hand tools, and possibly an oil filter wrench if performing an oil change.

Will clearing the P0029 code with a scanner fix the issue?

Clearing the code will turn off the Check Engine Light temporarily, but the underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for P0029 Subaru OBDII Code

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