Technical Description of OBD-II Trouble Code
The circuit for the Intake Manifold Runner Position Sensor / Switch in Bank 2 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. The code primarily focuses on the value provided by the intake manifold flow control valve/position sensor, also known as the IMRC valve/sensor. This component, typically located at one end of the intake manifold, assists the vehicle’s PCM in regulating the amount of air entering the engine at different RPMs. 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 P2022 engine code may manifest in the following symptoms:
Causes
The common causes for this code to appear are:
Diagnostic Steps and Repair Information
It is advisable to begin by checking for any technical service bulletins (TSB) related to your specific vehicle. There may be a known issue with a known fix provided by the manufacturer, which can save time and money during diagnosis.
The next step involves locating the bank 2 IMRC valve/sensor in your particular vehicle. Once found, visually inspect the connectors and wiring for any signs of damage such as rubbing, scraping, bare wires, worn spots, or melted plastic connectors. Separate 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. After cleaning, 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, then the issue was likely related to the connections.
If the code does reappear, it is necessary to test the IMRC valve voltage signals to and from the PCM. Monitor the IMRC valve voltage using a scan tool or test the signal with a digital volt ohm meter (DVOM) if a scan tool is unavailable. With the valve disconnected, check the voltage between the IMRC valve power wire and ground. It should be close to battery voltage (12 volts). If not, there is a problem with this circuit. 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, then the problem is resolved and clearing the code is all that remains. Otherwise, a defective ground circuit between the valve and the PCM or a defective PCM is 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 the related engine performance issue.
