P200B Intake Manifold Runner Performance Bank 2

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P200B Intake Manifold Runner Performance Bank 2

OBD-II Trouble Code Technical Description

Intake Manifold Runner Performance Bank 2

What does that mean?

This is a generic diagnostic trouble code (DTC) and applies to many OBD-II vehicles (1996-newer). That may include but is not limited to vehicles from Hyundai, Kia, Mercedes Benz, Sprinter, Vauxhall, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.

If your OBD II equipped vehicle has stored a code P200B, it means that the powertrain control module (PCM) has detected a problem with the intake manifold runner control (IMRC) system on bank 2. Code P200B applies explicitly to the bank of the engine that does not contain the #1 cylinder.

The IMRC system is designed to regulate and reconfigure intake air as it enters the engine. At lower engine RPM levels, airflow is restricted in order to reduce exhaust emissions. At higher engine RPM levels, a swirling effect is created by the IMRC flaps. This helps to optimize fuel atomization and maximize engine performance.

Typically, the IMRC system is composed of a series of metal flaps that are attached to a pivot rod which runs through the intake ports for each cylinder. Usually, all the flaps on one bank of the engine move in unison because they are all attached to a singular pivot rod; controlled by the same actuator. Each bank of the engine is outfitted with its own pivot rod, flaps, actuator, etc. which function independently of the other engine banks.

The PCM uses input data from numerous engine sensors to determine the desired degree at which IMRC system components should be implored. Once the PCM has applied the appropriate amount of voltage (to the correct circuit) for the desired IMRC adjustment, engine sensor data is monitored to see if the intended effect is realized.

If the PCM detects that the IMRC system cannot be controlled effectively, a code P200B will be stored and a malfunction indicator lamp may be illuminated.

What is the severity of this DTC?

Stored IMRC codes will typically result in wide open intake port flaps. The P200A should not be classified as severe but should be addressed at the earliest convenient opportunity.

What are some of the symptoms of the code?

Symptoms of a P200B trouble code may include:

  • Diminished fuel efficiency
  • Reduced engine performance
  • Lean or rich exhaust codes are stored
  • Hesitation upon acceleration
  • Stumble at idle
  • What are some of the common causes of the code?

    Causes for this code may include:

  • Broken or worn IMRC linkage or bushings
  • Defective IMRC actuator
  • Broken or collapsed IMRC vacuum lines
  • Faulty IMRC vacuum supply actuator
  • Open or shorted IMRC circuits or connectors
  • Bad IMRC sensor or other engine sensor/s
  • What are some P200B troubleshooting steps?

    If mass airflow (MAF), manifold air pressure (MAP), or intake air temperature (IAT) codes are stored, these should be addressed before attempting to diagnose the stored P200B.

    If you can locate a technical service bulletin (TSB) that matches the vehicle year, make, and model; as well as the engine size, code/s stored, and symptoms exhibited, it may yield helpful diagnostic information. A diagnostic scanner, a digital volt/ohmmeter (DVOM), a hand held vacuum pump, and a source of vehicle specific diagnostic information will be necessary to diagnose a code P200B.

    I like to begin my diagnosis with a visual inspection of the IMRC system. I focus on mechanical linkage, vacuum lines and hoses, as well as electrical harnesses and connectors. Worn or damaged IMRC hardware, bushings, or linkage should be repaired or replaced before proceeding.

    I would proceed by locating the vehicle diagnostic connector, plugging in the scanner, and retrieving all stored codes and pertinent freeze frame data. It’s a good idea to record this information before clearing the codes, in case the code proves to be intermittent. Once this is completed, test drive the vehicle until the PCM either enters readiness mode or the code is reset. Assume that the code is intermittent and will be much more difficult to diagnose if the PCM enters readiness mode. At this point, the conditions which contributed to the code being stored may need to worsen before an accurate diagnosis can be made.

    Component testing procedures (and specifications), diagnostic flow charts, connector pin out charts, and connector face views will be necessary in completing the next step of your diagnosis.

    With the key on and engine off (KOEO), use the vacuum pump to actuate the IMRC system for the engine bank in question. With vacuum pressure applied to the IMRC actuator, check to make sure that the flaps are opening upon request. If they are, observe scanner data to see if IMRC sensors (if equipped) are functioning properly. If discrepancies are detected, test the respective sensor/s using the DVOM. Suspect that sensors which fail to comply with manufacturer specifications are defective.

    If all sensors and circuitry appear to be functioning as intended, and the IMRC hardware is intact, use the DVOM to test the runner control solenoid/s for the appropriate circuit. Actuator solenoids which fail to comply with manufacturer’s specifications should be considered defective.

  • Suspect that the PCM has failed or is experiencing a programming error only after all other possibilities have been exhausted
  • Need help?

    Let us fix your problem. You are most welcome our diagnosis experts have in most cases the knowledge and skills to find the cause of the error code p200b and to solve the problems.

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    "Delete Error Code Permanently, Disable DTC Error Code Function for p200b in the ECU"

    In extreme cases, we even have the option to permanently remove the specific DTC p200b and disable the function of the specific error code in the ECU. All other fault code functions will then continue to work to protect the engine. This is different from clearing an error code with a diagnostic device. We have the option to permanently remove the function of the specific error code, so that it never comes back. Also emergency running that occurs on the specific error code can be solved in most cases.

    Of course we prefer to first try to solve the cause of the error code, but sometimes the only solution is to permanently disable the DTC function of p200b.

    Make an appointment for permanent removal of p200b