AutoCodes – Generic – P1512

P1512 Code - Intake Manifold Runner Control Stuck Closed Bank 1

Quick Answer

The Intake Manifold Runner Control (IMRC) is an electrically actuated system consisting of a motorized actuator with an attaching linkage for each housing on each bank. Common causes include Faulty Intake Manifold Runner Control (IMRC) actuator, Intake Manifold Runner Control actuator harness is open or shorted, Intake Manifold Runner Control actuator 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: P1512 indicates Intake Manifold Runner Control Stuck Closed Bank 1.
Common causes: Common causes include Faulty Intake Manifold Runner Control (IMRC) actuator, Intake Manifold Runner Control actuator harness is open or shorted, Intake Manifold Runner Control actuator 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 37,673

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1512 Description

The Intake Manifold Runner Control (IMRC) is an electrically actuated system consisting of a motorized actuator with an attaching linkage for each housing on each bank. The linkage attaches to the housing butterfly plate levers. Each IMRC housing is an aluminum casting with two intake air passages for each cylinder. One passage is always open, and the other is opened and closed with a butterfly valve plate. The housing uses a return spring to hold the plates closed. The motorized actuator houses internal switches to provide feedback to the Powertrain Control Module (PCM), indicating linkage and plate position. Under about 3000 rpm, the vacuum solenoid will be energized. This will allow the manifold vacuum to be applied and the butterfly valve plates to stay closed. Above approximately 3000 rpm, the vacuum solenoid will be de-energized. This will allow a vacuum to vent from the actuator and the butterfly valve plates to open. The Diagnostic Trouble Code (DTC) sets when the IMRC is commanded open, but the IMRC monitor indicates close.

OBDII Code P1512 - Intake Manifold Runner Control Stuck Closed Bank 1 - AutoCodes.com — P1512 Code - Intake Manifold Runner Control Stuck Closed Bank 1

What does this mean?

What are the Possible Causes of the DTC P1512?

Faulty Intake Manifold Runner Control (IMRC) actuator
Intake Manifold Runner Control actuator harness is open or shorted
Intake Manifold Runner Control actuator circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1512?

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 P1512 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 P1512 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1512 Audi — Intake Manifold Changeover Valve Circuit Short To Positive
P1512 BMW — DISA Control Circuit Signal Low
P1512 Buick — Intake Manifold Runner Control Stuck Close
P1512 Cadillac — Intake Manifold Runner Control Stuck Close
P1512 Chevrolet — Intake Manifold Runner Control Stuck Close
P1512 Ford — Intake Manifold Runner Control Stuck Closed Bank 1
P1512 GMC — Intake Manifold Runner Control Stuck Close
P1512 Jaguar — Closed Throttle Position Switch Low Input
P1512 Lincoln — Intake Manifold Runner Control Stuck Closed Bank 1
P1512 Mazda — Intake Manifold Runner Control Stuck Closed Bank 1
P1512 Mercury — Intake Manifold Runner Control Stuck Closed Bank 1
P1512 MINI — DISA Control Circuit Signal Low
P1512 Saturn — Main Throttle Idle Actuator Malfunction Mechanical Failure
P1512 Subaru — Idle Air Control Solenoid Valve Signal 2 Circuit Low Input
P1512 Suzuki — Main Throttle Idle Actuator Malfunction
P1512 Toyota — Boost Pressure High
P1512 Volkswagen — Intake Manifold Changeover Valve Circuit Short To Positive

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 P1512 Code

1. What are the common symptoms of OBDII code P1512 (Intake Manifold Runner Control Stuck Closed Bank 1)?

The common symptoms include rough idling, decreased engine performance, reduced fuel efficiency, and the Check Engine Light illuminating.

2. What are the possible causes of OBDII code P1512?

The code P1512 can be caused by a faulty intake manifold runner control actuator, a stuck closed intake manifold runner control valve, wiring issues, or a vacuum leak.

3. How can I diagnose the cause of OBDII code P1512?

Diagnosing the cause of P1512 usually involves checking the intake manifold runner control system for any physical obstructions, testing the actuator and valve for proper operation, and inspecting the wiring and vacuum lines for any damage.

4. Can I continue driving with OBDII code P1512 present?

It is not recommended to continue driving with the P1512 code as it can lead to further engine damage and decreased performance. It is best to address the issue promptly.

5. How can I repair OBDII code P1512 (Intake Manifold Runner Control Stuck Closed Bank 1)?

Repairing the P1512 code typically involves replacing the faulty intake manifold runner control actuator or repairing any wiring or vacuum leaks causing the issue.

6. Is it possible to clear the OBDII code P1512 without fixing the underlying issue?

Clearing the code without addressing the underlying problem will only temporarily turn off the Check Engine Light. The issue will likely resurface, and the code will reappear.

7. Can a DIY enthusiast fix OBDII code P1512 at home?

Depending on the skill level and access to tools, some DIY enthusiasts may be able to diagnose and fix the P1512 code at home. However, it is recommended to consult a professional if unsure.

8. How much does it typically cost to repair OBDII code P1512?

The cost of repairing the P1512 code can vary depending on the cause of the issue, the labor rates in your area, and the specific components that need to be replaced. It is advisable to obtain quotes from local mechanics.

9. Are there any preventive measures to avoid OBDII code P1512 in the future?

Regular maintenance of the intake manifold runner control system, including cleaning and inspection, can help prevent issues that may trigger the P1512 code.

10. Will OBDII code P1512 affect the overall drivability of the vehicle?

Yes, OBDII code P1512 can affect the drivability of the vehicle by causing rough idling, reduced engine performance, and decreased fuel efficiency. It is essential to address the issue promptly.