Technical Description of OBD-II Trouble Code
The circuit for the Intake Manifold Runner Position Sensor / Switch on Bank 1 is registering a high voltage.
What does that mean?
This particular diagnostic trouble code is applicable to fuel injected engines from various manufacturers since 2003.
These manufacturers include Ford, Dodge, Toyota, Mercedes, Volkswagen, Nissan, and Infiniti, among others.
This code primarily focuses on the value provided by the intake manifold flow control valve/position sensor, also known as the IMRC valve/sensor. It is typically located at one end of the intake manifold and assists the vehicle’s PCM in regulating the amount of air entering the engine at different RPMs. This code specifically pertains to Bank 1, which consists of cylinder number 1. Regardless of the vehicle manufacturer and fuel system, this code indicates an electrical circuit malfunction.
The troubleshooting steps may vary depending on the manufacturer, type of fuel system, and the specific IMRC sensor and wire colors used.
Symptoms
The symptoms associated with a P2017 engine code may include:
Causes
The common causes for this code to be triggered are:
Diagnostic Steps and Repair Information
It is always advisable to check for technical service bulletins (TSB) specific to your vehicle as a starting point. These bulletins may provide information about known issues and their respective fixes, potentially saving time and money during diagnosis.
The next step involves locating the IMRC valve/sensor on your vehicle and visually inspecting the connectors and wiring. Look for any signs of damage such as rubbing, scraping, bare wires, worn spots, or melted plastic connectors. Disconnect the connectors and examine the terminals inside for any signs of burning or corrosion. If necessary, clean the terminals using Electrical Contact cleaner or rubbing alcohol and a small plastic bristle brush. Once cleaned, allow them to air dry and apply dielectric silicone compound to the connector cavity before reassembling.
If you have a scan tool, clear the diagnostic trouble codes from memory and check if the code returns. If it does not, the issue was likely related to the connections.
If the code does reappear, you will need to test the voltage signals to and from the IMRC valve using a scan tool or a digital volt ohm meter (DVOM). With the valve disconnected, check the voltage on the power wire and the ground wire. The voltage should be close to battery voltage (12 volts). If not, there is a problem with the circuit. If the voltages are correct, reconnect the wires to the valve and check the voltage on the ground wire (PCM control wire). It should also be close to battery voltage. If not, the IMRC valve/solenoid may be open or shorted.
If all the tests have been passed and the code persists, use a scan tool to check if it can open and close the IMRC valve. This functionality may be referred to as an “Actuator Test,” “Bi-Directional Test,” or “Functional Test” depending on the scan tool and vehicle manufacturer. If the scan tool can operate the IMRC valves, the problem is likely resolved and clearing the code is all that remains. Otherwise, a defective ground circuit or PCM may be indicated.
It is important to note that if the initial diagnostic steps do not reveal the problem, it is advisable to consult with an automotive professional. Further repairs may require the removal of the intake manifold to accurately diagnose this code and address any related engine performance issues.
