P1078 Code - Intake Manifold Runner Control System Malfunction High RPM
Quick Answer
Engine power is achieved by closing and opening the Intake Manifold Runner Control (IMRC) valve. Common causes include Faulty Intake Manifold Runner Control (IMRC) Valve, IMRC Valve harness is open or shorted, IMRC 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
- P1078 indicates Intake Manifold Runner Control System Malfunction High RPM.
- Common causes
- Common causes include Faulty Intake Manifold Runner Control (IMRC) Valve, IMRC Valve harness is open or shorted, IMRC 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 P1078 Description
What are the Possible Causes of the DTC P1078?
- Faulty Intake Manifold Runner Control (IMRC) Valve
- IMRC Valve harness is open or shorted
- IMRC Valve circuit poor electrical connection
How to Fix the DTC P1078?
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 P1078 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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Information for Specific Makes
- P1078 Acura — Intake Manifold Runner Control System Malfunction High RPM
- P1078 BMW — VVT Overload Protection Control Motor Current High Input Bank 1
- P1078 Honda — Intake Manifold Runner Control System Malfunction High RPM
- P1078 Infiniti — Exhaust Valve Timing Control Position Sensor Bank 1 Circuit
- P1078 MINI — VVT Overload Protection Control Motor Current High Input Bank 1
- P1078 Nissan — Exhaust Valve Timing Control Position Sensor Bank 1 Circuit
Frequently Asked Questions about P1078 Code
1. What are the common symptoms of OBDII code P1078?
- Common symptoms include rough idling, loss of power, poor acceleration, and the Check Engine Light illuminating.
2. What are the possible causes of the Intake Manifold Runner Control System Malfunction High RPM code?
- The code P1078 can be triggered by issues such as a faulty intake manifold runner control valve, a vacuum leak, a stuck intake manifold runner, or a problem with the wiring or connectors.
3. How can I diagnose the cause of OBDII code P1078?
- Diagnosis typically involves using a scan tool to read the code, inspecting the intake manifold runner control system components for damage or wear, and testing the operation of the control valve.
4. Can a dirty intake manifold cause code P1078 to appear?
- Yes, a dirty or clogged intake manifold can disrupt the proper functioning of the intake manifold runner control system, potentially triggering the P1078 code.
5. How can I repair OBDII code P1078 related to the Intake Manifold Runner Control System Malfunction High RPM?
- Repair options may include cleaning or replacing the intake manifold runner control valve, fixing any vacuum leaks, addressing wiring issues, or repairing or replacing the intake manifold runner if it's stuck.
6. Is it safe to continue driving with the P1078 code present?
- It is not recommended to ignore the P1078 code, as it can lead to poor engine performance and potentially cause further damage if left unresolved. It's best to address the issue as soon as possible.
7. Can a DIY enthusiast fix the Intake Manifold Runner Control System Malfunction High RPM issue?
- Depending on the root cause of the problem, some DIY enthusiasts may be able to tackle the repair themselves, especially if they have experience working on intake manifold components and access to the necessary tools.
8. Will resetting the Check Engine Light make the P1078 code disappear permanently?
- Simply resetting the Check Engine Light without addressing the underlying issue causing the P1078 code will not make it disappear permanently. The problem must be diagnosed and repaired to prevent the code from reappearing.
9. How can regular maintenance help prevent OBDII code P1078?
- Regular maintenance, such as keeping the intake system clean, inspecting for leaks, and replacing components at recommended intervals, can help prevent issues that may trigger the P1078 code.
10. Is it recommended to seek professional help for diagnosing and repairing code P1078?
- If you are unsure about diagnosing or repairing the P1078 code yourself, or if the issue seems complex, it is advisable to seek professional help from a qualified mechanic or automotive technician.
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