What Is the P2018 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
Diagnose
Difficulty of Inspecting
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The P2018 code is a generic OBD-II code that applies to fuel injection engines typical in cars manufactured after 2003. This code applies to the following vehicles (as well as some others):
- Dodge
- Ford
- Mercedes
- Volkswagen
- Nissan
- Infiniti
More About Error Code P2018
The P2108 code indicates that there is a problem that has caused your car’s ECM to reroute the air intake; the ECM will activate this code when the sensor sends an unexpected signal and will verify the sensor’s signal against another sensor. The changes the ECM commands will also be validated by monitoring the changes detected by other sensors. This can impact a car in many ways and can impact drivability if allowed to progress unchecked.
The intake manifold flow control valve or position sensor is generally placed at one end of the intake manifold and helps the powertrain control module (PCM) in a car to regulate the amount of air being pulled into the engine at set RPM ranges. The P2018 code refers to issues in cylinder bank 1.
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What Are the Symptoms of a P2018 Code?
If your car experiences manifold issues that cause the activation of the P2018 code, several visible and audible symptoms are likely to present themselves. These include, but are not limited to:
- The activation of the check engine light
- Lack of power
- Misfiring
- Low fuel efficiency
In some cases, a car may also display increased emissions, but this is more common in vehicles that have a combination of issues and codes displayed.
What Are Some Causes of a P2018 Code?
Several issues can contribute to the activation of this code. The most typical underlying causes for the activation of the P2018 diagnostic error code include:
- Faulty or damaged IMRC actuator/sensor
- Faulty or damaged powertrain control module (PCM) – Rare
- Stuck or faulty IMRC valve
- Stuck or faulty throttle plates or body
How Serious Is the P2018 Code?
Because this code indicates an issue with the intake manifold runner sensor, it is classed as a severe issue that is likely to cause a reduction in drivability. If this sensor is left to function improperly, it can impact a car’s ability to accelerate efficiently and safely, leading to potential risks to the driver, passengers, and other road users.
Can I Still Drive with a P2018 Code?
It may be possible to drive a car displaying the OBD code P2018 safely for a short time, but driving long distances is not recommended as this issue can lead to drivability problems surrounding safe acceleration. It is unlikely to lead to total failure of the engine unless left entirely unchecked for a prolonged period but should be considered a safety risk.
How Easy Is It to Diagnose a P2018 Code?
Diagnosing the cause of a P2018 code should be straightforward for a professional, but there are several common diagnostic mistakes to be aware of. For example, clearing the ECM memory codes before checking the data or, alternatively, failing to clear the memory codes after repair may lead to the recurrence of issues. Likewise, many professionals replace parts when the wiring has been eroded by a loose harness tie-down. While an issue, this may not be the underlying cause, and this action should be taken in conjunction with a thorough inspection.
How Difficult Is It to Inspect a P2018 Code?
Assuming the diagnostic process is detailed and effective, inspecting and repairing the causes of a P2018 code should not pose a problem to professionals. The most common repairs associated with this error code are:
- Replacing the bank 1 intake manifold runner sensor or valve
- Repairing the sensor connector or wiring harness
- Replacing faulty internal circuits within the engine control module
In some cases, action may also be needed to repair or replace the IMRC vacuum solenoids due to carbon deposits in the vent portion.
Need Additional Help with Your P2018 Code?
Damage to the bank 1 intake manifold flow control sensor or control valve can impact your car’s efficiency and drivability if not corrected. The best course of action is to seek prompt assessment and repairs. The Kelley Blue Book (KBB) service center locator can provide a list of reputable, local auto repair centers for your consideration.
If you have questions about this code or any other OBD code, the KBB OBD-II database has information about all currently used OBD diagnostic error codes. This free resource includes information about the meanings, symptoms, and causes of these codes for drivers who want to make empowered decisions about their vehicle’s care and maintenance.
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