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Engine-Codes – Subaru – P1499 Subaru

P1499 Subaru Code - EGR Signal Line 4 Circuit High

Quick Answer

The P1499 Subaru code indicates a problem with the EGR (Exhaust Gas Recirculation) system's signal line 4 circuit being too high. Common causes include Faulty EGR valve, Wiring or connector issues in the EGR system, Malfunctioning EGR solenoid. 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
P1499 Subaru indicates EGR Signal Line 4 Circuit High.
Common causes
Common causes include Faulty EGR valve, Wiring or connector issues in the EGR system, Malfunctioning EGR solenoid.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1499 Subaru Description

The P1499 Subaru code indicates a problem with the EGR (Exhaust Gas Recirculation) system's signal line 4 circuit being too high. The EGR system is responsible for reducing harmful emissions by recirculating a portion of the engine's exhaust gases back into the intake manifold. This helps lower combustion temperatures and reduce the formation of nitrogen oxides (NOx).

OBDII Code P1499 Subaru - EGR Signal Line 4 Circuit High
P1499 Subaru Code - EGR Signal Line 4 Circuit High

Common Causes of P1499 Subaru

  1. Faulty EGR valve
  2. Wiring or connector issues in the EGR system
  3. Malfunctioning EGR solenoid
  4. PCM (Powertrain Control Module) failure
  5. Carbon buildup in the EGR system

Symptoms of P1499 Subaru

  1. Check Engine Light is illuminated on the dashboard
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Engine knocking or pinging
  5. Failed emissions testing

How to Fix P1499 Subaru

  1. Use a scan tool to diagnose the specific cause of the high signal in the EGR circuit.
  2. Inspect and test the EGR valve, solenoid, and wiring for any faults or damage.
  3. Clean or replace the EGR valve if necessary.
  4. Repair or replace any damaged wiring or connectors in the EGR system.
  5. Reset the fault codes and test drive the vehicle to ensure the issue is resolved.

Cost to Fix P1499 Subaru

The cost of repairing a P1499 Subaru code can vary depending on the specific cause of the issue. On average, the parts for this repair could range from $100 to $300, while the labor costs could be anywhere from $100 to $250. This estimate does not include diagnostic fees, taxes, or any additional repairs that may be needed. It's recommended to consult with a professional mechanic to get an accurate cost estimate for your specific vehicle.

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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 P1499 Subaru Code

1. What does the OBDII code P1499 mean on a Subaru?

P1499 indicates a problem with the EGR (Exhaust Gas Recirculation) Signal Line 4 Circuit, specifically a high voltage issue.

2. What are the common symptoms of code P1499 in a Subaru?

Typical symptoms include an illuminated check engine light, rough idling, decreased fuel efficiency, and possible engine hesitation or stalling.

3. What causes the P1499 code to appear?

Common causes include a faulty EGR valve, a damaged or shorted EGR signal line, a malfunctioning EGR sensor, or poor electrical connections in the circuit.

4. How can I diagnose the P1499 code on my Subaru?

Start by inspecting the EGR valve, wiring, and connectors for damage or corrosion. Use a multimeter to check for voltage irregularities in the EGR signal line.

5. Can I still drive my Subaru with a P1499 code?

Driving with a P1499 code is not recommended, as it can lead to reduced engine performance and potential long-term damage to the engine or emissions system.

6. How can I fix the P1499 code on my Subaru?

Repairs may include replacing the EGR valve, repairing or replacing damaged wiring, cleaning the EGR passages, or replacing the EGR sensor if it's faulty.

7. How much does it cost to fix a P1499 code?

Repair costs vary, but replacing an EGR valve typically ranges from $150 to $400, including parts and labor, depending on your location and vehicle model.

8. Can a dirty EGR valve cause the P1499 code?

Yes, a clogged or dirty EGR valve can cause improper function and trigger the P1499 code.

9. Will clearing the P1499 code solve the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

10. Is the P1499 code specific to Subaru vehicles?

While P1499 is most commonly associated with Subaru vehicles, the specific meaning and repair process may vary by manufacturer. Always refer to your vehicle’s service manual.

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