Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161209-55387-lma2i1js:136:3912)
    at m.mountComponent (/tmp/execjs20161209-55387-lma2i1js:47:15602)
    at /tmp/execjs20161209-55387-lma2i1js:49:31860
    at a.r.perform (/tmp/execjs20161209-55387-lma2i1js:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161209-55387-lma2i1js:49:31821)
    at r (/tmp/execjs20161209-55387-lma2i1js:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161209-55387-lma2i1js:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161209-55387-lma2i1js:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161209-55387-lma2i1js:173:8), <anonymous>:17:3)
    at /tmp/execjs20161209-55387-lma2i1js:173:8

P2020 OBD-II Trouble Code: Intake Manifold Runner Pos Sensor/Switch Circuit Range/Performance Bank 2

Check Engine Light

P2020 Code Definition

A P2020 code is a generic powertrain code related to the fuel and air metering and auxiliary emissions control systems. The Intake Manifold Runner Control (IMRC) controls are utilized to change or control airflow in the engine’s air intake system. If a P2020 code appears, it means the engine control module (ECM) has found a problem with the intake manifold runner control circuit in the engine’s bank 2 (or number 2 cylinder).

A P2020 code is related to:

  • P2014: Intake Manifold Runner Position Sensor/Switch Circuit Bank 1
  • P2015: Intake Manifold Runner Position Sensor / Switch Circuit Range / Performance Bank 1
  • P2016: Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1
  • P2017: Intake Manifold Runner Position Sensor/Switch Circuit High Bank 1
  • P2018: Intake Manifold Runner Position Sensor/Switch Circuit Interm Bank 1
  • P2019: Intake Manifold Runner Position Sensor/Switch Circuit Bank 2
  • P2021: Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 2
  • P2022: Intake Manifold Runner Position Sensor/Switch Circuit High Bank 2
  • P2023: Intake Manifold Runner Position Sensor/Switch Circuit Interm Bank 2
  • P0172: System too Rich Bank 1
  • P2046: Reductant Temperature Sensor Circuit Intermittent

What the P2020 Code Means

The P2020 code appears when bank 2 (the engine bank with the number 2 cylinder) is receiving a voltage reading showing that the intake manifold runner flaps are out of position, or voltage or resistance readings from the solenoid are varying outside of allowed parameters.

A vehicle’s ECM utilizes several sensor readings to determine the position of the intake manifold runners to create air turbulence in the intake manifold. If the ECM does not detect the correct manifold air pressure variation, a P2020 code will be stored.

What Causes the P2020 Code?

The P2020 code can be caused by a number of potential problems, including:

  • Damaged or defective IMRC solenoid
  • Carbon deposits on the manifold runner flaps
  • Sticking or faulty throttle plates
  • Damaged or defective IMRC valves, actuators or sensors in bank 2
  • Damaged or defective ECM (rare)

What are the Symptoms of the P2020 Code?

The symptoms of a P2020 code may include:

  • Check Engine Light or warning light may be illuminated
  • Vibrations coming from the engine
  • Fluctuations in RPM at idle (or rough idle)
  • Hesitation at vehicle acceleration
  • Decreased fuel efficiency

How Does a Mechanic Diagnose the P2020 Code?

A mechanic will use a variety of methods to diagnose a P2020 code including:

  • Utilize an OBD-II scanner to check for a P2020 code stored in the ECM
  • Visually inspect all wires and connectors for damage
  • Visually inspect all hoses and vacuum lines for damage or leaks
  • Test the voltage signals between the IMRC solenoid and the ECM
  • Check and test that the IMRC valve moves
  • Remove the IMRC and check for any damage
  • Test the movement of the plates/valve for binding or looseness

Common Mistakes when Diagnosing the P2020 Code

One common mistake when diagnosing a P2020 code includes replacing the incorrect parts, such as a runner flap when the solenoid is the problem. Follow the proper procedures for correct diagnosis.

In addition, ensure you first diagnose any other intake/engine performance-related codes and check for any leaks before proceeding to diagnose a P2020, as a leak can cause the air/fuel ratio to present the incorrect possibility of a lean running engine.

How Serious is the P2020 Code?

Because mechanical failures in the IMRC can cause engine failure, this is considered a serious code. It is recommended to have your vehicle diagnosed and repaired immediately when this code appears.

What Repairs can Fix the P2020 Code?

  • Repair or replace any damaged, frayed, shorted, or burned wiring
  • Clean or replace any damaged connectors
  • Replace any damaged plates or valves
  • Replace a damaged or defective IMRC solenoid
  • Replace any damaged or defective IMRC sensors or actuators
  • Replace any damaged or defective runner flaps or components
  • Test all system circuits (continuity and resistance)
  • Replace or repair the IMRC
  • Clear the code, test drive the vehicle, and rescan to see if they reappear

Additional Comments for Consideration Regarding the P2020 Code

Some manufacturers have issued technical service bulletins (TSBs) regarding the P2020 fault code, so it is recommended to always check for any associated bulletins before making any repairs.

Need Help with a P2020 Code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...


Related questions

Q: Fuel injector problems

Hello. Thanks for writing in. The diagnostic code that is triggering your warning light it's a fairly generic code relating to a bad reading at one of the sensors. This bad reading can mean that there's an electrical or mechanical...

Q: Do I need to repair or replace my ECM?

You can get an ECM-related code for a number of different reasons. It can be something as simple as a voltage loss from a bad battery connection, or it may need a new ECM. I usually check the codes and...

Q: Oil pressure repair cost, Oil Light comes on, and Check Engine Light is on - code P0022