Guide To P2078 OBD Error Code Solutions

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Vehicle set to OBD Error code P2078? Rough engine idling and check engine light flashing? If YES, then your vehicle is having problems basically due to implausible signals from the IMT position sensor bank 1. It is a generic OBD-II code and applies to all OBD-II equipped vehicles. If you wish to learn more about this error code, go ahead and give a look at our subsequent sections.

If OBD error code P2078 is a completely alien word and you are worried about what to do, then you no longer need to stress out. We are here to help you out with all your queries related to this code. Your vehicle’s PCM will set the error code when it detects unlikely signals from the intake manifold tuning valve position sensor. In other words, this error code P2078 is referred to as Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High Bank 1.

What causes this problem with the Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High Bank 1?

• Malfunctioning intake manifold tuning valve position sensor/switch
• Open or short in the intake manifold tuning valve position sensor/switch harness
• Bad or poor electrical connections within the Intake manifold tuning valve position sensor/switch circuit
• Bad intake manifold tuning valve (IMTV)
• Malfunctioning barometric pressure sensor
• Bad intake manifold runner control (IMRC)
• Issues with the powertrain control module (PCM)

1. Powertrain Control Module - As your car’s PCM is responsible for making the engine and transmission work in synchronisation. Any issue with the powertrain control module will cause major problems with the efficient running of the vehicle. So, don’t think twice and replace the faulty PCM now to get rid of this error code P2078.
2. Engine Control Module - Error code P2078 flashing? It might be due to a faulty ECM. Engine control module if faulty can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
3. Intake Manifold Tuning Valve - For those who are unaware of the purpose of the IMTV, we would like to tell you that it is a valve in the cylinder head of an internal-combustion engine that opens at the proper moment in the cycle to allow the fuel-air mixture to be drawn into the cylinder. If faulty, it can lead to many problems. So, we recommend you to change them at the earliest.
4. Intake Manifold Actuator - Perfect functioning of the actuator is extremely important as if actuator is at fault, the air to fuel ratio may change, causing serious performance issues. Buy new actuator and replace the faulty one now to get rid of this error code P2078 now.
5. Diagnostic Tools - If you need one, you can simply find it with us. You can choose from a selection of diagnostic tools on our website and make it easy on yourself when diagnosing problems and creating accurate solutions for your car.

Interested in knowing the symptoms to obd code P2078? If yes, then you have arrived at the right place. We at Parts Avatar have listed out few common symptoms associated with Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High Bank 1.

Common Symptoms

• Flashing of check engine light
• Surging engine
• Fall in low end engine torque
• Rough engine idling
• Flashing of the service engine soon warning light

Have a look at some ways with which you can correct the P2078 code:

• Replacing failed intake manifold tuning valve position sensor/switch
• Replacing open or short in the intake manifold tuning valve position sensor/switch harness
• Replacing intake manifold tuning valve position sensor/switch circuit connection poor
• Replacing failed intake manifold tuning valve (IMTV)
• Replacing failed barometric pressure sensor
• Replacing problematic intake manifold runner control (IMRC)
• Reprogramming powertrain control module (PCM)

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of Faulty Intake Manifold Tuning Valve Position Sensor, Intake Manifold Tuning Valve Position Switch, Intake Manifold Tuning Valve, Intake Manifold Runner Control, Powertrain Control Module, Barometric Pressure Sensor, Intake Manifold Runner Actuator, Intake Manifold Runner Control Sensor, Intake Manifold and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this P2078 fault code:

Visually inspect all wiring, connectors, and components associated with the intake manifold tuning valve control circuit for engine bank 1. The mechanic should look for any loose, corroded, or damaged wiring, connectors, or components. After making the repairs, clear the code and test the system by test driving the vehicle to see if the code returns.

Also, the mechanic should download the freeze frame data and any stored trouble codes, as this allows them to repair codes in the order the codes were stored. Using a specialized scanner, the mechanic should test all of the pins in the CAN Bus harness. Before doing so, the mechanic should also install some sort of memory saving device.

The mechanic should compare their findings to the manufacturer's specifications. In addition, the mechanic should test all of the control module ground circuits for continuity with the battery ground, connecting an auxiliary ground cable to help with the diagnosis. Now, using a digital volt/ohmmeter and a CAN Bus system wiring diagram, the mechanic needs to test continuity between each individual controller, comparing their findings to the manufacturer's specifications. Additionally, the mechanic should test the PCM to see if the fault lies with a defective driver. Clear the P2078 trouble code and retest the system to see if it returns.

Common mistakes when diagnosing the P2078 code

Avoid committing these common mistakes while conducting your diagnosis

• Faulty Intake manifold runner control actuator
• Faulty Powertrain Control Module (PCM)
• Faulty Wiring issue