P1549 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 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.
Code P1549 Description
What are the Possible Causes of the DTC P1549?
- 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?
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 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 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1549 Acura — Charging System High Voltage
- P1549 Audi — Wastegate Bypass Regulator Valve Open/Short To Ground
- P1549 Ford — Intake Manifold Communication Control Circuit Malfunction
- P1549 Honda — Charging System High Voltage
- P1549 Lincoln — Intake Manifold Communication Control Circuit Malfunction
- P1549 Mazda — Intake Manifold Temperature Valve Vacuum Actuator Connection
- P1549 Mercury — Intake Manifold Communication Control Circuit Malfunction
- P1549 Saab — Turbocharger System Malfunction
- P1549 Volkswagen — Wastegate Bypass Regulator Valve Open/Short To Ground
Frequently Asked Questions about P1549 Code
1. What are the common symptoms of OBDII code P1549 (Intake Manifold Communication Control Circuit Malfunction)?
- Common symptoms include rough idling, engine stalling, loss of power, and the Check Engine light being illuminated.
2. What are the possible causes of OBDII code P1549?
- The code may be triggered by issues such as a faulty intake manifold runner control (IMRC) module, damaged wiring or connectors, or a malfunctioning IMRC actuator.
3. How can I diagnose the cause of OBDII code P1549?
- Diagnosing the issue may involve using a scan tool to retrieve the code, checking the IMRC components for damage, and inspecting the wiring and connectors for any signs of wear or corrosion.
4. Can I drive my vehicle with OBDII code P1549?
- It is not recommended to drive your vehicle with this code active, as it can lead to engine performance issues and potential damage if not addressed promptly.
5. How can I repair OBDII code P1549?
- Repair options may include replacing the faulty IMRC module or actuator, repairing damaged wiring or connectors, and clearing the code with a scan tool.
6. Is it possible to prevent OBDII code P1549 from occurring?
- Regular maintenance of the intake manifold system, such as keeping it clean and free of debris, can help prevent issues that may trigger this code.
7. Can a DIY enthusiast fix OBDII code P1549 at home?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this code at home by following repair guides and being cautious when handling electrical components.
8. How much does it typically cost to repair OBDII code P1549 at a mechanic's shop?
- The cost of repairing this code can vary depending on the specific cause, but it may range from $200 to $500 or more, including parts and labor.
9. Will OBDII code P1549 cause permanent damage to my engine if not fixed immediately?
- While the code itself may not cause immediate damage, ignoring the underlying issue can lead to further problems with engine performance and efficiency over time.
10. How long does it take to repair OBDII code P1549?
- The repair time can vary based on the exact cause of the code and the complexity of the fix, but it may take anywhere from 1 to 3 hours or more to complete the repair.
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