Error Code P022B: What It Means & What To Do?

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OBD-II Code Powertrain Control Module (PCM) failure is defined as a Charge Air Cooler Bypass Control "A" Circuit Low. Air flap actuator failure, PCM failure and Wiring issue are the common problems that trigger the P022B Code. This is also a generic code which applies to all makes and models of the vehicles equipped with charge air cooler. This code may be cause by a mechanical and / or electrical fault. If the PCM cannot control the actuator, it will set code P022B

Technical description for this OBD II Code P022B error is Charge Air Cooler Bypass Control A Circuit Low. This P022B code is set when the ECM detects a lower than desired electrical value. Due to OBD Code P022B you may start confronting problems like Poor engine performance; engine misfiring, poor fuel mileage or your vehicle may start entering into limp mode. The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to after burn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly.

The ECM illuminates the check engine light with P022B and associated codes when it monitors a condition outside of a particular range within the intercooler bypass control circuit or system. P022B Charge Air Cooler Control A Circuit Low code is set when the ECM detects a lower than desired electrical value.

What causes the problem of Charge Air Cooler Bypass Control “A” Circuit Low?

• Defective ECU strategies or components will prevent proper regeneration
• The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold.
• The computer uses this information to control fuel mixture.
• An air leak forward of the DPF will change the sensor readings resulting in the code
• Damaged fuse/relay
• Frayed Pin/Connector problem
• Faulty wiring harness
• Clogged bypass valve

1. Air Cooler Bypass Control Valve - According to its name this Air Cooler Bypass Control Valve permits turbo-boosted charged air to bypass a charge-air cooler, if this valve is flawed can make bunches of issues.
2. Air Flap Actuator - A flap actuator is also termed as damper; it is just an electrical machine that moves the flap. This flap is utilized to open or close the specific parts of the channel keeping in mind the end goal to control which way the air goes. On the off chance that it is failed will prompt this OBD Code.
3. Engine Control Module - The ECM/ PCM, it’s an essential part of the vehicle’s on-board computer, which usually mounted in either the engine compartment or under one of your front seats, it gives the brain for the engine of the vehicle and makes sure the timing and emissions control system work efficiently. So, if it founds faulty should be repaired or replaced as required.
4. Defective Fuse/Relay - Fuses and Relays however they are little parts yet assume essential part in smooth working of your vehicle, if you discover them faulty then please replace them immediately.
5. Pin/Connector - Ensure the Pin/connector should not be corroded and have broken bolt tab as these could turn into the main factor setting this code P022B.
6. Diagnostic Tool - In order to diagnose and fix the error, you should have high grade diagnostic tools. Visit us today to grab amazing deals.

Error Code P022B should be rectified at earliest else it could develop into something much more serious fairly quickly. Symptoms which specify error code OBD P022B may comprise:

• The light may stay on or light intermittently as the DPF regenerates
• The engine will be sluggish on acceleration
• Faulty PCM
• If the DPF is not cleared the ECU will revert to the “Limp Home Mode”
• Lack of power from the turbo/supercharger

To correct or fix this code one should seek assistance from a trained automotive diagnostician but if you want to do it by yourself, please follow the below mentioned steps:

• Start with locating the charge air cooler bypass control valve and ensure engine is in its off position. When valve is found, check for any physical damage. If you discover it flawed replace it.
• Check the functionality of the valve by evacuating it completely. Kindly refer to service manual as well while performing this and if possible clean the valve before reinstalling.
• It would be ideal if you review the wires associated with the circuit attentively, ensure they should not have any cuts or indications of corrosions.
• Check and confirm the valve’s functionality by controlling it and monitoring it’s range of motion with the help of your scan tool. In the event that you see the valve sticking and there is nothing blocking it, it demonstrates that the valve is defective.
• Confirm the integrity of the circuit by playing out various essential electrical tests with the assistance of multimeter.

This trouble code is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model. Keep the below mentioned points in mind while fixing this code but it’s always good to have a qualified technician to look after your vehicle when this error code arises.

• First of all, disconnect the valve
• The red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.
• Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.
• Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.
• Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine.

Common Mistakes When Diagnosing the P022B Code

One should remember these couple of thing to stay away from committing mistakes while diagnosing the error code P022B. Generally people miss on these things and commit mistakes.

• Always check and record the integrity of your battery and charging system before investigating.
• Ensure to switch off the engine.
  
• Make sure to disconnect battery before playing out any electrical repairs.
• Always refer to service manual first because it’s the matter of your expensive vehicle.