Symptoms
Symptoms of a P2013 code may include:
- Hesitation during acceleration
- Reduced engine performance, especially at low RPM
- Rich or lean exhaust
- Decreased fuel efficiency
- Engine surging
Causes
Possible causes of this engine code include:
- Loose or binding intake manifold runner controls, bank 2
- Faulty IMRC actuator solenoid, bank 2
- Defective 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, bank 2
- Faulty MAP sensor
- Corroded IMRC actuator solenoid connector face
Diagnostic and Repair Procedures
Diagnosing a P2013 code requires a diagnostic scanner, digital volt/ohmmeter (DVOM), and reliable vehicle information source. Checking Technical Service Bulletins (TSBs) for specific symptoms, stored codes, and the vehicle’s make/model before starting diagnostics is helpful. If a relevant TSB is found, its information will likely aid diagnosis since TSBs document numerous repairs.
A practical diagnostic starting point is visual inspection of system wiring and connector faces. Given IMRC actuator connectors’ corrosion susceptibility (which could cause open circuits), focus attention on these areas.
Connect the scanner to the vehicle’s diagnostic port to retrieve stored codes and freeze frame data. Record this information in case of intermittent codes. Then clear codes and test-drive to see if the code returns.
If the code recurs, access the IMRC actuator solenoid and IMRC runner position sensor. Consult vehicle information sources for specifications, then use the DVOM to perform resistance tests on both components. Replace any non-compliant parts and retest the system.
To prevent PCM damage, disconnect all associated controllers before circuit resistance testing with the DVOM. If actuator and sensor resistance meet manufacturer specifications, use the DVOM to test resistance and continuity across all system circuits.
Additional Diagnostic Notes:
- Carbon coking inside intake manifold walls can cause IMRC flap binding
- Exercise caution when handling small screws or rivets near intake manifold openings
- Test IMRC flap binding with actuator disconnected from shaft
- Screws (or rivets) securing flaps to the shaft may loosen or fall out, causing flap blockage…