AutoCodes – Dodge – P0479 Dodge

P0479 Dodge Code - Exhaust Pressure Control Valve Intermittent

Q: 1. What are common symptoms of OBDII code P0479 in a Dodge related to the Exhaust Pressure Control Valve Intermittent?

- Common symptoms include reduced engine performance, decreased fuel efficiency, and potential black smoke coming from the exhaust.

Q: 2. What are the possible causes of OBDII code P0479 indicating an Exhaust Pressure Control Valve Intermittent issue in a Dodge?

- Possible causes include a faulty exhaust pressure control valve, wiring issues, a clogged exhaust system, or a malfunctioning exhaust gas recirculation (EGR) valve.

Q: 3. How can I diagnose the OBDII code P0479 in my Dodge related to the Exhaust Pressure Control Valve Intermittent?

- Diagnosis involves using an OBDII scanner to read the code, visually inspecting the exhaust pressure control valve and related components, and checking the wiring for any damage or corrosion.

Q: 4. What are some repair tips for addressing OBDII code P0479 in a Dodge indicating an Exhaust Pressure Control Valve Intermittent problem?

- Repair tips include cleaning or replacing the exhaust pressure control valve, checking and repairing any damaged wiring, clearing the code using an OBDII scanner, and conducting a test drive to ensure the issue is resolved.

Q: 5. Can driving with OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge cause further damage?

- Continuing to drive with this issue may result in reduced engine performance, decreased fuel efficiency, and potential damage to other engine components over time. It is recommended to address the problem promptly.

Q: 6. How much does it typically cost to repair OBDII code P0479 indicating an Exhaust Pressure Control Valve Intermittent issue in a Dodge?

- Repair costs can vary depending on the exact cause of the problem, but typically range from $100 to $500 for parts and labor at a professional repair shop.

Q: 7. Is it possible to reset the OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge without making any repairs?

- While you can clear the code using an OBDII scanner, it is not recommended to reset the code without addressing the underlying issue, as it may lead to continued problems and potential damage to the vehicle.

Q: 8. Can a DIY enthusiast with basic automotive skills repair OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge?

- Depending on the exact cause, DIY repair may be possible, such as cleaning or replacing the exhaust pressure control valve. However, more complex issues may require professional assistance.

Q: 9. How long does it typically take to repair OBDII code P0479 indicating an Exhaust Pressure Control Valve Intermittent problem in a Dodge?

- The repair time can vary based on the cause of the issue and the repair process involved, but it usually takes anywhere from 1 to 4 hours at a repair shop.

Q: 10. Are there any preventive measures to avoid OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge?

- Regular maintenance, including checking and cleaning the exhaust system components, inspecting wiring for damage, and using high-quality fuel, can help prevent issues leading to this OBDII code.

Quick Answer

Exhaust Back Pressure Regulator - Is a variable position valve that controls exhaust back pressure during cold ambient temperatures to increase cab heat and decrease the amount of time needed to defrost the windshield. Common causes include Faulty Exhaust Back Pressure Valve, Exhaust Back Pressure Valve harness is open or shorted, Exhaust Back Pressure Valve circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0479 Dodge indicates Exhaust Pressure Control Valve Intermittent.
Common causes: Common causes include Faulty Exhaust Back Pressure Valve, Exhaust Back Pressure Valve harness is open or shorted, Exhaust Back Pressure Valve circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 1,524

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 24, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0479 Dodge Description

Exhaust Back Pressure Regulator - Is a variable position valve that controls exhaust back pressure during cold ambient temperatures to increase cab heat and decrease the amount of time needed to defrost the windshield. The Engine Control Module (ECM) uses the measured exhaust back pressure, (ambient) intake air temperature, engine oil temperature and engine load to determine the desired exhaust back pressure. Valve position is controlled by switching the output signal circuit to 12 volts inside the ECM. On/off time is modulated from 0 to 99 % dependent upon the exhaust back pressure desired.
Upon each initial engine start-up, the ECM exercises the exhaust back pressure valve by commanding it to cycle on and off once. If upon start-up the temperature of intake air sensed by the Intake Air Temperature (IAT) sensor is < 37°F (5°C) and the oil temperature sensed by the Engine Oil Temperature (EOT) sensor is between 32°-140°F (0-60°C) it will continue to keep the back pressure valve partially closed. As the oil temperature rises during engine operation, the ECM will control the valve in response to the rising oil temperature.

OBDII Code P0479 Dodge - Exhaust Pressure Control Valve Intermittent - AutoCodes.com — P0479 Dodge Code - Exhaust Pressure Control Valve Intermittent

What does this mean?

What are the Possible Causes of the DTC P0479 Dodge?

Faulty Exhaust Back Pressure Valve
Exhaust Back Pressure Valve harness is open or shorted
Exhaust Back Pressure Valve circuit poor electrical connection

How to Fix the DTC P0479 Dodge?

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 does this mean?

Code Tech Notes

Check the Exhaust Back Pressure Valve (EBPV) butterfly valve is opening and closing freely and not sticking. If it seems to move freely you can then check the connector and circuit for the EBPV solenoid.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0479 Dodge 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 P0479 Dodge code?

Need more information on how to fix the P0479 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0479 Dodge 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 P0479 Dodge Code

1. What are common symptoms of OBDII code P0479 in a Dodge related to the Exhaust Pressure Control Valve Intermittent?

- Common symptoms include reduced engine performance, decreased fuel efficiency, and potential black smoke coming from the exhaust.

2. What are the possible causes of OBDII code P0479 indicating an Exhaust Pressure Control Valve Intermittent issue in a Dodge?

- Possible causes include a faulty exhaust pressure control valve, wiring issues, a clogged exhaust system, or a malfunctioning exhaust gas recirculation (EGR) valve.

3. How can I diagnose the OBDII code P0479 in my Dodge related to the Exhaust Pressure Control Valve Intermittent?

- Diagnosis involves using an OBDII scanner to read the code, visually inspecting the exhaust pressure control valve and related components, and checking the wiring for any damage or corrosion.

4. What are some repair tips for addressing OBDII code P0479 in a Dodge indicating an Exhaust Pressure Control Valve Intermittent problem?

- Repair tips include cleaning or replacing the exhaust pressure control valve, checking and repairing any damaged wiring, clearing the code using an OBDII scanner, and conducting a test drive to ensure the issue is resolved.

5. Can driving with OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge cause further damage?

- Continuing to drive with this issue may result in reduced engine performance, decreased fuel efficiency, and potential damage to other engine components over time. It is recommended to address the problem promptly.

6. How much does it typically cost to repair OBDII code P0479 indicating an Exhaust Pressure Control Valve Intermittent issue in a Dodge?

- Repair costs can vary depending on the exact cause of the problem, but typically range from $100 to $500 for parts and labor at a professional repair shop.

7. Is it possible to reset the OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge without making any repairs?

- While you can clear the code using an OBDII scanner, it is not recommended to reset the code without addressing the underlying issue, as it may lead to continued problems and potential damage to the vehicle.

8. Can a DIY enthusiast with basic automotive skills repair OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge?

- Depending on the exact cause, DIY repair may be possible, such as cleaning or replacing the exhaust pressure control valve. However, more complex issues may require professional assistance.

9. How long does it typically take to repair OBDII code P0479 indicating an Exhaust Pressure Control Valve Intermittent problem in a Dodge?

- The repair time can vary based on the cause of the issue and the repair process involved, but it usually takes anywhere from 1 to 4 hours at a repair shop.

10. Are there any preventive measures to avoid OBDII code P0479 related to the Exhaust Pressure Control Valve Intermittent in a Dodge?

- Regular maintenance, including checking and cleaning the exhaust system components, inspecting wiring for damage, and using high-quality fuel, can help prevent issues leading to this OBDII code.