Symptoms
Symptoms of a P2017 engine code may include:
- Malfunction Indicator Lamp (MIL) illuminated
- Lack of power
- Poor fuel economy
Causes
Typically, the causes for this code to set are as follows:
- Faulty IMRC actuator relay (if applicable)
- Faulty IMRC actuator/sensor
- Rarely – Faulty Powertrain Control Module (PCM)
- (programming required after replacement)
Diagnostic Steps
and Repair Information
A good starting point is always to check the Technical Service Bulletins (TSBs) for your specific vehicle. Your issue may be a known problem with a known fix published by the manufacturer and can save you time and money when diagnosing.
The next step in this process is to locate the IMRC valve/sensor on your specific vehicle. Once located, visually inspect the connectors and wiring. Look for chafing, scuffs, bare wires, worn spots, or melted plastic connectors. Disconnect the connectors and carefully inspect the terminals (the metal parts) inside the connectors. Verify that they are not burnt or corroded. If in doubt, obtain electrical contact cleaner from any auto parts store if terminal cleaning is needed. If not available, get some rubbing alcohol and a small plastic-bristled brush (used toothbrush) to clean them. Once cleaned, allow them to air dry. Pack the connector cavity with dielectric silicone compound (same as used for light bulb sockets and spark plug wires) and reassemble.
If you have a scan tool, clear the diagnostic codes from memory and see if this code returns. If it does not, the connections were likely your problem.
If the code returns, we will need to test the voltage signals to and from the IMRC valve to the PCM. Monitor the IMRC valve voltage on your scan tool. If a scan tool is not available, test the signal going to the IMRC valve with a digital voltmeter (DVOM). With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Turn the ignition switch to the “on” position and check the voltage. It should be fairly close to battery voltage (12 volts). If not, the circuit has the problem. If it has 12 volts, reconnect the wires to the valve and check the voltage on the ground wire (PCM control wire). It should also be fairly close to battery volts. If not, the IMRC valve/solenoid is suspected to be open/shorted at this time.
If all tests have passed so far and you still have the same code, check your scan tool and see if it can open and close the IMRC valve. This may be called an “actuator test,” “bi-directional test,” or “functional test” depending on the scan tool/vehicle manufacturer. If the scan tool has this capability and it can operate the IMRC valves, the problem is either resolved and a simple code clearing is all that remains, or a new PCM would be required. If the scan tool has the capability but is unable to move the valves, either a faulty ground circuit between the valve and the PCM is indicated, or a faulty PCM.
It cannot be overemphasized that once the first or first couple of diagnostic steps are performed and the problem is not obvious, it would be wise to consult an automotive professional regarding the repair of your vehicle, as repairs from there may require the removal of the intake manifold in order to properly diagnose this code and the related engine performance issue.