Symptoms
Symptoms of a P2007 code may include:
- Hesitation during acceleration
- Rich exhaust
- Reduced fuel efficiency
- Engine surging
Causes
Causes
Possible causes of this engine code include:
- Loose or binding intake manifold runner controls, bank 2
- Faulty IMRC actuator solenoid, bank 2
- Faulty intake manifold runner position sensor, bank 2
- Open or shorted wiring in the IMRC actuator solenoid control circuit
- Carbon buildup on IMRC flaps or intake manifold ports
- Faulty MAP sensor
- Corroded IMRC actuator solenoid connector face
Diagnostic and Repair Procedures
A diagnostic scanner, digital volt/ohmmeter (DVOM), and a reliable source of vehicle information will be needed when attempting to diagnose a P2007 code. I would check technical service bulletins (TSBs) for specific symptoms, stored codes, and the vehicle’s make and model before starting my diagnosis. If I find a related TSB, the information will often help diagnose the code in question.
My usual starting point (for any diagnosis) is a visual inspection of the system wiring and connector faces. In this case, I know that IMRC actuator connectors are prone to corrosion. This could cause an open circuit, so I would focus attention on that area.
Now, I connect the scanner to the vehicle’s diagnostic connector and retrieve all stored codes and freeze frame data. I make a habit of writing down this information in case it’s an intermittent code; then I clear the codes and test drive the vehicle to see if the code resets.
Continuing, I would access the IMRC actuator solenoid and IMRC runner position sensor if the code resets. Consult your vehicle information source for testing specifications for both components. Use the DVOM to perform a resistance test on the solenoid and sensor. If either part does not meet specifications, replace it and retest the system.
Disconnect all associated controllers before testing circuit resistance with the DVOM to avoid damaging the PCM. If the actuator and sensor resistance meet manufacturer specifications, use the DVOM to test resistance and continuity on all system circuits. Repair or replace shorted or open circuits as needed.
Additional Diagnostic Notes:
Be careful when handling small screws or rivets in or near intake manifold openings
Test IMRC flap binding with the actuator disconnected from the shaft
Screws (or rivets) that secure the flaps to the shaft may loosen or fall out, causing the flaps to bind
Carbon coking inside intake manifold walls can cause IMRC flaps to bind