AutoCodes – Subaru – P1494 Subaru

P1494 Subaru Code - EGR Signal Line 2 Circuit Low

Quick Answer

P1494 Subaru indicates EGR Signal Line 2 Circuit Low. Common causes include Faulty EGR Valve, EGR Valve harness is open or shorted, EGR Valve 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: P1494 Subaru indicates EGR Signal Line 2 Circuit Low.
Common causes: Common causes include Faulty EGR Valve, EGR Valve harness is open or shorted, EGR Valve 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 20,355

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 25, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1494 Subaru Description

OBDII Code P1494 Subaru - EGR Signal Line 2 Circuit Low - AutoCodes.com — P1494 Subaru Code - EGR Signal Line 2 Circuit Low

What does this mean?

What are the Possible Causes of the DTC P1494 Subaru?

Faulty EGR Valve
EGR Valve harness is open or shorted
EGR Valve poor electrical connection

How to Fix the DTC P1494 Subaru?

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 P1494 Subaru 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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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 P1494 Subaru Code

1. What does the OBDII code P1494 mean on a Subaru?

P1494 indicates an issue with the EGR Signal Line 2 Circuit Low, meaning the engine control module (ECM) has detected a low voltage signal from the EGR system's sensor.

2. What are the symptoms of code P1494 on a Subaru?

Common symptoms include a check engine light, reduced engine performance, rough idling, decreased fuel efficiency, and possible stalling.

3. What causes the P1494 code to appear on a Subaru?

Typical causes include a faulty EGR valve, wiring issues (e.g., damaged or corroded connections), a malfunctioning EGR sensor, or a problem with the ECM.

4. Can I still drive my Subaru with a P1494 code?

While the vehicle may still be drivable, doing so can lead to poor performance, increased emissions, and potential engine damage if left unresolved.

5. How do I diagnose the P1494 code on a Subaru?

Diagnosis involves checking the EGR valve and sensor for proper operation, inspecting wiring and connectors for damage, and using a multimeter to test for correct voltage signals.

6. How is the P1494 code typically fixed on a Subaru?

Repairs might include replacing the EGR valve or sensor, repairing or replacing damaged wiring, cleaning carbon buildup in the EGR system, or reprogramming the ECM if necessary.

7. Can a dirty EGR valve cause the P1494 code?

Yes, carbon buildup in the EGR valve can restrict airflow, leading to improper sensor readings and triggering the code.

8. How much does it cost to fix a P1494 code on a Subaru?

Repair costs vary but can range from $150 to $500, depending on whether the issue is a simple wiring fix or a replacement of the EGR valve or sensor.

9. Will clearing the P1494 code fix the problem?

Clearing the code will remove the check engine light temporarily, but the issue will persist unless the underlying problem is addressed.

10. Can a faulty ECM cause the P1494 code on a Subaru?

While rare, a malfunctioning ECM could potentially cause the code. This should be checked only after ruling out more common causes like the EGR valve, sensor, or wiring.