P200B Intake Manifold Runner Performance Bank 2

Description and meaning of DTC p200b

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.

p200b diagnostic trouble code symptoms

Symptoms of a P200B trouble code may include:Diminished fuel efficiencyReduced engine performanceLean or rich exhaust codes are storedHesitation upon accelerationStumble at idle

DTC p200b - possible causes

Causes for this code may include:Broken or worn IMRC linkage or bushingsDefective IMRC actuatorBroken or collapsed IMRC vacuum linesFaulty IMRC vacuum supply actuatorOpen or shorted IMRC circuits or connectorsBad IMRC sensor or other engine sensor/s

How to fix OBD-II diagnostic trouble code p200b

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

More OBD-II diagnostic trouble codes (DTC)