P2019 Intake Manifold Impeller Position Sensor / Switch Circuit Bank 2

P2019 Intake Manifold Impeller Position Sensor / Switch Circuit Bank 2

OBD-II DTC Datasheet

Intake Manifold Impeller Position Switch / Sensor Circuit Bank 2

What does this mean?

This Generic Powertrain / Engine DTC is commonly applied to fuel injection engines from most manufacturers since 2003.

These manufacturers include, but are not limited to, Ford, Dodge, Toyota, Mercedes, Nissan, and Infiniti.

This code mainly refers to the value provided by the intake manifold flow control valve / sensor, also called the IMRC valve / sensor (usually located at one end of the intake manifold), which helps the vehicle PCM to monitor the amount of air. allowed in the engine at different speeds. This code is set for bank 2, which is a cylinder group that does not include cylinder number 1. This could be a mechanical or electrical fault, depending on the vehicle manufacturer and the fuel system.

Troubleshooting steps may vary depending on the make, fuel system and intake manifold valve position / position sensor (IMRC) type and wire colors.

symptoms

Symptoms of a P2019 engine code may include:

• Malfunction Indicator Lamp (MIL) illuminated
• Lack of power
• Random misfires
• Poor fuel economy

reasons

Typically, the reasons for setting this code are as follows:

• Stuck / malfunctioning throttle / body
• Stuck / defective IMRC valve (bank 2)
• Faulty actuator / IMRC sensor
• Rare - Faulty Powertrain Control Module (PCM)

Diagnostic steps and repair information

A good starting point is always to check the Technical Service Bulletins (TSB) for your particular vehicle. Your problem may be a known issue with a known manufacturer-released fix and could save you time and money while troubleshooting.

First, look for other DTCs. If any of these are related to the intake / engine system, diagnose them first. A misdiagnosis is known to occur if a technician diagnoses this code before any system codes related to intake / engine performance are thoroughly diagnosed and rejected. Check for leaks at inlet or outlet. An intake leak or vacuum leak will deplete the engine. Exhaust gas leakage from the air-fuel / oxygen ratio (AFR / O2) sensor gives the impression of a lean-burn engine.

Then find the IMRC valve / sensor on your specific vehicle. Once detected, visually inspect the connectors and wiring. Look for scuffs, scuffs, exposed wires, burn marks, or molten plastic. Disconnect the connectors and carefully inspect the terminals (metal parts) inside the connectors. See if they look rusty, burnt, or possibly green compared to the usual metallic color you're probably used to seeing. If terminal cleaning is required, you can purchase electrical contact cleaner at any parts store. If this is not possible, find 91% rubbing alcohol and a light plastic bristle brush to clean them (an inexpensive toothbrush will work here; just don't put it back in the bathroom when you're done!). Then let them air dry, take a dielectric silicone compound (the same material they use for bulb holders and spark plug wires) and place where the terminals make contact.

If you have a scan tool, clear the diagnostic trouble codes from memory and see if the code returns. If this is not the case, then there is most likely a connection problem.

If the code does return, we will need to check the IMRC valve / sensor voltage signals coming from the PCM as well. Monitor the IMRC sensor voltage on your scan tool. If no scan tool is available, check the signal from the IMRC sensor with a digital volt ohm meter (DVOM). With the sensor connected, the red wire of the voltmeter must be connected to the signal wire of the IMRC sensor and the black wire of the voltmeter must be connected to ground. Start the engine and check the IMRC sensor input. Click on the throttle. As the engine speed increases, the IMRC sensor signal should change. Check the manufacturer's specs, as there may be a table informing you of how much voltage should be at a given RPM.

If it fails this test, you will need to make sure the IMRC valve will move and not stick or get stuck in the intake manifold. Remove the IMRC sensor / actuator and grasp the pin or lever that moves the plates / valves in the intake manifold. Be aware that they may have a strong return spring attached to them, so they may experience tension when pivoting. When turning the plates / valves, check for binding / leaks. If so, you will need to replace them and this usually means that you will need to replace the entire intake manifold. It is better to entrust this task to professionals.

If the IMRC plates / valves rotate without binding or excessive loosening, this indicates the need to replace the IMRC sensor / actuator and retest.

Again, it cannot be stressed enough that all other codes must be diagnosed before this, since problems that cause other codes to be set can also cause this code to be set. It also cannot be stressed enough that after the first or two diagnostic steps have taken place and the problem is not obvious, it would be a prudent decision to consult with an automotive professional regarding repairing your vehicle, as most of the repairs from there onward require removing and replacing the intake manifold in order to correct this code and engine performance issue correctly.

Related DTC discussions

• Smart 2003 P2019 P201B P201D P201FHello everyone, after a complete engine overhaul my 2003 Smart For Two Cabrio had a misfire on the 2nd cylinder after 2.000 rpm. The engine starts and runs fine, very smooth, no slips / rattles, etc., However, if I increase the revs around 2000rpm, it suddenly drops 2 cylinders and raises ... 

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