What Is the P2016 Code?
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The diagnostic code, P2016, indicates that there is a problem with a vehicle’s intake manifold, more specifically the runner position sensor or switch circuit bank 1. When this code activates, it means that there is low voltage present that is causing issues with the engine control module (ECM) and intake manifold. While this does not mean the system has experienced a failure, it does indicate that voltage levels are too low to allow for proper functioning as per manufacturer set perimeters. This code can occur in the following vehicles:
- Audi
- Chrysler
- Dodge
- Ford
- Hyundai
- Jeep
- KIA
- Lexus
- Lincoln
- Mercury
- Toyota
- Volkswagen
More About Error Code P2016
When working properly, the intake manifold ensures that the cylinders within the engine of a car get the proper level of fresh air. Working together with the air intake, throttle body, and fuel delivery systems, the intake manifold ensures that the engine burns the proper mix of air and fuel. When there is low voltage to the intake manifold sensor circuit, as indicated by the P2016 code, the engine control module (ECM) will begin to pick up imbalances in fuel composition.
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What Are the Symptoms of a P2016 Code?
One of the first symptoms of any form of damage or fault within the engine or power systems of a car is, of course, the activation of the check engine light. However, there are more specific symptoms which include:
- Fluctuating RPM
- Low power conditions (depending on the engine control module failure management mode)
- Lowered fuel efficiency
- Issues accelerating or maintaining speed
- Engine stalling or failure
What Are Some Causes of a P2016 Code?
Several issues can cause low voltage in the intake manifold sensor circuit and prompt the ECM to flag a P2016 code. The most common causes include:
- Binding or sticking of the intake manifold runner valve
- Damage to the intake manifold runner valve
- Cracked or broken vacuum line
- Incorrect manifold runner sensor 1 position
- Incorrect wiring position
- Damaged wiring, circuits, or connectors
- Faulty engine control module (rare)
How Serious Is the P2016 Code?
The activation of a P2016 error code should be considered an issue of mild to moderate severity because while it indicates the likelihood of an oxygen-to-fuel ratio problem, this is not likely to cause major issues with driving on a day-to-day basis. However, there is a chance that the low voltage coming from sensor bank 1 may cause the ECM to place the car into failure mode.
Can I Still Drive with a P2016 Code?
Assuming the car flagging a P2016 code has not entered failure mode, you should be able to drive safely albeit with lower fuel efficiency and potential acceleration issues from time to time. However, if the ECM causes your car to enter failure mode, you may find it difficult or impossible to drive the vehicle safely (or at all). This is a far more serious issue, of course, that should be attended to promptly.
How Easy Is It to Diagnose a P2016 Code?
A skilled mechanic will find it relatively straightforward to diagnose the underlying issues causing the activation of a P2016 code. To do so, they will take the following steps:
- Access ECM freeze frame data to identify the codes and data for failures
- Check the wiring and connectors to the sensors for instability, corrosion, and damage
- Perform a manufacturer pinpoint test on the intake manifold sensor to verify failure
- Scan sensor data to identify return voltage during repositioning
- Disconnect and check the signal voltage in connectors and test sensor continuity
These steps should allow for the proper identification of the underlying issues.
How Difficult Is It to Inspect a P2016 Code?
Inspecting the systems impacted during a P2016 code is straightforward with the right tools and knowledge. However, some common mistakes can make it harder to fully resolve the underlying issues, including:
- Clearing ECM memory before documenting active codes and checking the freeze frame data
- Replacing the sensor or mechanical parts without checking if loose harness tie-downs have rubbed through wiring
- Failing to clear ECM memory after implementing repairs
Need Additional Help with Your P2016 Code?
If you are experiencing issues with acceleration or fuel efficiency and you are concerned that there may be issues with your car’s intake manifold sensor circuit, it is best to seek professional help before it escalates. The Kelley Blue Book service center locator is a useful and free tool that provides a list of reputable auto repair centers in your local area.
If you want to know more about the P2016 error code, or any other diagnostic error codes, Kelley Blue Book also has an online OBD-II database that details all currently used diagnostic error codes, their meanings, and their symptoms. This is a free resource that can help you to make empowered and informed choices about the care of your vehicle.
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