AutoCodes – Mercury – P1549 Mercury

P1549 Mercury Code - Intake Manifold Communication Control Circuit Malfunction

Quick Answer

With the key ON or engine running, the Powertrain Control Module (PCM) detects a fault in the Intake Manifold Communication Control (IMCC) or ITV control circuit Common causes include Faulty Intake Manifold Temperature Valve, Intake Manifold Temperature Valve harness is open or shorted, Intake Manifold Temperature Valve 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: P1549 Mercury indicates Intake Manifold Communication Control Circuit Malfunction.
Common causes: Common causes include Faulty Intake Manifold Temperature Valve, Intake Manifold Temperature Valve harness is open or shorted, Intake Manifold Temperature Valve 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 1,486

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1549 Mercury Description

With the key ON or engine running, the Powertrain Control Module (PCM) detects a fault in the Intake Manifold Communication Control (IMCC) or ITV control circuit

OBDII Code P1549 Mercury - Intake Manifold Communication Control Circuit Malfunction - AutoCodes.com — P1549 Mercury Code - Intake Manifold Communication Control Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1549 Mercury?

Faulty Intake Manifold Temperature Valve
Intake Manifold Temperature Valve harness is open or shorted
Intake Manifold Temperature Valve circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1549 Mercury?

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 P1549 Mercury 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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Get the P1549 Mercury 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 P1549 Mercury Code

1. What are the common symptoms of OBDII code P1549 in a Mercury related to the Intake Manifold Communication Control Circuit Malfunction?

- Common symptoms include rough idle, engine misfires, decreased fuel efficiency, and illuminated check engine light.

2. What are the possible causes of the P1549 code in a Mercury vehicle?

- The code may be triggered by issues such as a faulty intake manifold tuning valve actuator, damaged wiring or connectors, or a faulty engine control module (ECM).

3. How can I diagnose the Intake Manifold Communication Control Circuit Malfunction in my Mercury?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, performing a visual inspection of related components, and conducting tests on the intake manifold tuning valve actuator and associated circuitry.

4. Can I drive my Mercury with the P1549 code present?

- It is not recommended to drive your vehicle with the P1549 code active, as it can lead to poor engine performance and potential damage if left unresolved.

5. How do I repair the Intake Manifold Communication Control Circuit Malfunction in my Mercury?

- Repair steps may involve replacing the intake manifold tuning valve actuator, repairing or replacing damaged wiring or connectors, and clearing the fault code with a diagnostic scanner.

6. Are there any DIY tips for addressing the P1549 code in my Mercury?

- DIY enthusiasts may attempt to inspect wiring connections for damage, clean electrical connectors, and perform basic troubleshooting before seeking professional assistance.

7. How much does it typically cost to repair the P1549 code in a Mercury?

- The cost of repairs can vary depending on the specific cause of the issue, but it may range from $200 to $500 for parts and labor.

8. Can the P1549 code be triggered by a loose gas cap in a Mercury?

- It is unlikely that a loose gas cap would directly trigger the P1549 code, as this code specifically relates to issues with the intake manifold communication control circuit.

9. Is the P1549 code a common problem in Mercury vehicles?

- While not extremely common, the P1549 code related to the Intake Manifold Communication Control Circuit Malfunction can occur in certain Mercury models, especially those equipped with variable intake systems.

10. Will resetting the check engine light resolve the P1549 code in my Mercury?

- Resetting the check engine light may temporarily turn it off, but if the underlying issue causing the P1549 code is not addressed, the light is likely to illuminate again.