AutoCodes – Volkswagen – P0490 Volkswagen

P0490 Volkswagen Code - Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High

Quick Answer

The Engine Control Module (ECM) does not detect voltage on the Exhaust Gas Recirculation (EGR) Solenoid circuit. Common causes include Faulty Exhaust Gas Recirculation (EGR) Solenoid, Exhaust Gas Recirculation (EGR) Solenoid harness is open or shorted, Exhaust Gas Recirculation (EGR) Solenoid 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: P0490 Volkswagen indicates Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High.
Common causes: Common causes include Faulty Exhaust Gas Recirculation (EGR) Solenoid, Exhaust Gas Recirculation (EGR) Solenoid harness is open or shorted, Exhaust Gas Recirculation (EGR) Solenoid 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.

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Code Popularity 4,429

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
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Code P0490 Volkswagen Description

The Engine Control Module (ECM) does not detect voltage on the Exhaust Gas Recirculation (EGR) Solenoid circuit.

OBDII Code P0490 Volkswagen - Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High - AutoCodes.com — P0490 Volkswagen Code - Exhaust Gas Recirculation Throttle Control Circuit 'A' Circuit High

What does this mean?

What are the Possible Causes of the DTC P0490 Volkswagen?

Faulty Exhaust Gas Recirculation (EGR) Solenoid
Exhaust Gas Recirculation (EGR) Solenoid harness is open or shorted
Exhaust Gas Recirculation (EGR) Solenoid circuit poor electrical connection

How to Fix the DTC P0490 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 P0490 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.

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Need more information on how to fix the P0490 Volkswagen code? Get Access to Factory Service Manuals

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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 P0490 Volkswagen Code

1. What are the common symptoms of OBDII code P0490 in a Volkswagen?

- Common symptoms include rough idling, engine hesitation, reduced fuel efficiency, and the Check Engine Light being illuminated.

2. What does the OBDII code P0490 indicate in a Volkswagen?

- The code P0490 indicates a potential issue with the Exhaust Gas Recirculation (EGR) Throttle Control Circuit 'A', specifically a high voltage condition.

3. What are some possible causes of OBDII code P0490 in a Volkswagen?

- Possible causes include a faulty EGR throttle control sensor, damaged wiring or connectors in the circuit, a malfunctioning EGR valve, or a problem with the engine control module.

4. How can I diagnose the cause of OBDII code P0490 in my Volkswagen?

- Diagnosing the issue may involve using a scan tool to retrieve the code and performing a visual inspection of the EGR system components, checking for damaged wires or connectors, and testing the EGR throttle control sensor.

5. Can I continue driving my Volkswagen with OBDII code P0490 present?

- It is not recommended to continue driving with the code present, as it can lead to further engine damage and reduced performance. It is best to address the issue promptly.

6. How can I repair OBDII code P0490 in my Volkswagen?

- Repairing the code may involve replacing the EGR throttle control sensor, repairing any damaged wiring or connectors, cleaning or replacing the EGR valve, or reprogramming the engine control module.

7. Will resetting the Check Engine Light resolve OBDII code P0490 in my Volkswagen?

- Resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing the code. It is important to diagnose and address the root cause of the problem.

8. Are there any preventive maintenance tips to avoid OBDII code P0490 in a Volkswagen?

- Regularly servicing the EGR system, checking for any signs of wear or damage, and using high-quality fuel can help prevent issues that may trigger code P0490.

9. Can a DIY enthusiast fix OBDII code P0490 in a Volkswagen?

- Depending on the skill level and knowledge of the enthusiast, some aspects of diagnosing and repairing code P0490 can be done DIY. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

10. How much does it typically cost to fix OBDII code P0490 in a Volkswagen?

- The cost of fixing code P0490 can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It is advisable to obtain quotes from reputable auto repair shops for an accurate estimate.