Intake Manifold Runner Control Circuit Low Bank 2
The P2012 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the intake manifold runner control (IMRC) circuit for bank 2. The IMRC system uses actuators and position sensors to adjust the length of the intake runners for optimal engine performance and emissions. A low circuit signal suggests a short to ground, open circuit, or faulty component, which can disrupt air-fuel mixture and cause drivability issues.
01. Most Common Causes
- Faulty intake manifold runner control actuator
- Short to ground in the IMRC circuit wiring
- Open circuit or poor connection in the IMRC harness
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation during acceleration
- Poor fuel economy
- Rough idle or engine stalling
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the IMRC actuator and wiring for damage, corrosion, or loose connections.
Step 3: Test the IMRC actuator resistance and voltage supply using a multimeter; compare to manufacturer specs.
Step 4: Check for continuity and shorts in the circuit between the actuator and PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the issue can cause reduced performance and potential engine damage. You may experience hesitation or stalling.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on whether the actuator or wiring needs replacement.