Intake Manifold Runner Control Stuck Closed - Bank 1 (GM)
What does P1513 mean?
The P1513 code means the vehicle's onboard diagnostic system has detected: Intake Manifold Runner Control Stuck Closed - Bank 1 (GM). This is a moderate severity code.
Common Symptoms
- Reduced engine power at high RPM
- Check Engine Light illuminated
- Engine feels sluggish above 4000 RPM
- Decreased fuel economy
- Slight engine vibration at higher speeds
Probable Causes (Ranked by Likelihood)
- Carbon buildup on IMRC plates - bank 1 Very High
- Failed IMRC actuator on bank 1 High
- Broken actuator rod or linkage Moderate
- Seized butterfly shaft from corrosion Moderate
- PCM control signal not reaching actuator Low
Step-by-Step Diagnostic Procedure
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Inspect the IMRC butterfly plates on bank 1 for carbon deposits or mechanical binding.
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Command the IMRC actuator with a scan tool and check for plate movement.
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Test the actuator motor by applying voltage directly.
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Check the linkage and connecting rods for breaks or disconnections.
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Verify the PCM output signal at the actuator connector.
Frequently Asked Questions
What is bank 1 on a V6?
Bank 1 is the side of the engine containing cylinder 1. On most GM V6 engines, this is the rear bank (closest to the firewall). Each bank has its own IMRC plates and actuator.
Can I clean the IMRC plates without removing the intake?
On some models, the plates are accessible through the throttle body or by removing the air intake ductwork. However, a thorough cleaning typically requires removing the intake manifold.
Will this cause my engine to fail?
No. The engine will run safely but with reduced high-RPM power and slightly worse fuel economy. The IMRC system is a performance optimization feature.