P2014 Intake Manifold Runner Position Sensor / Switch Circuit Bank 1
OBD-II Trouble Code Technical Description
Intake Manifold Runner Position Sensor / Switch Circuit Bank 1
What does that mean?
This generic powertrain/engine diagnostic trouble code typically applies to fuel injected engines from most manufacturers since 2003.
Those manufacturers include but are not limited to Ford, Dodge, Toyota, Mercedes, Nissan and Infiniti.
This code is mostly concerned about the value provided by the intake manifold flow control valve/position sensor, also called known as a IMRC valve/sensor (typically located at one end of the intake manifold) which helps the vehicle’s PCM control the amount of air being allowed into the engine at various RPMs. This code is set for Bank 1, which is the bank of cylinders that includes cylinder number 1. This can be a mechanical or an electrical circuit fault, depending upon vehicle manufacturer and fuel system.
Troubleshooting steps may vary depending upon manufacturer, type of fuel system and the type of intake manifold runner control valve/position (IMRC) sensor and wire colors.
Symptoms
Symptoms of a P2014 engine code may include:
Malfunction Indicator Lamp (MIL) illuminated Lack of power Occasional misfire Poor fuel economyCauses
Typically, the causes for this code to set are:
Sticking/faulty throttle plates/body Sticking/faulty IMRC valve Faulty IMRC actuator/sensor Rarely - faulty Powertrain Control Module (PCM)Diagnostic Steps and Repair Information
A good starting point is always to check for technical service bulletins (TSB) for your particular vehicle. Your issue may be a known issue with a known fix put out by the manufacturer and can save you time and money during diagnosis.
First, note if there are any other diagnostic fault codes. If any of them are intake/engine performance system related, diagnose them first. Misdiagnosis has been known to occur if a technician diagnoses this code before any intake/engine performance related system codes have been thoroughly diagnosed and dismissed. Insure there are no intake or exhaust leaks. An intake leak, or vacuum leak, makes the engine run lean. An exhaust leak gives the impression of a lean running engine by the air fuel ratio/oxygen (AFR/O2) sensor.
Next, locate the IMRC valve/sensor on your particular vehicle. Once located, visually inspect the connectors and wiring. Look for chafing, rubbing, bare wires, burn spots or melted plastic. Pull the connectors apart and carefully inspect the terminals (the metal parts) inside the connectors. See if they look corroded, burnt or possibly green in color versus the normal metal color you are probably used to seeing. You can get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. If this is not possible, find some 91% rubbing alcohol and a light plastic bristle brush to clean them with (an inexpensive toothbrush will work here; just don’t put it back in the bathroom when done!). Afterwards let them air dry, get some dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and put some where the terminals come into contact.
If you have a scan tool, clear the diagnostic trouble codes from memory, and see if this code returns. If it does not, then the connections were most likely your problem.
If the code does return, we will need to test the IMRC valve/sensor voltage signals to and from the PCM. Monitor IMRC sensor voltage on your scan tool. If a scan tool is not available, then test the signal coming from the IMRC sensor with a digital volt ohm meter (DVOM). With the sensor connected, the red voltmeter lead should be attached to the IMRC sensor signal wire and the black voltmeter lead connected to ground. Start the engine and monitor the IMRC sensor input. Snap the t
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