DTC P1512: IMRC Shutter Valve Stuck Closed: Condition

PCM monitors intake manifold runner control (IMRC) circuit voltage. DTC is set when PCM terminal No. 3 voltage is 1.6-4.9 volts for 3.2 seconds when IMRC valve is open. Possible causes are:

• Open circuit.
• Connector or terminal malfunction.
• IMRC malfunction.
• PCM malfunction.