P022A OBD Error Code: Problem & Solutions

<<See All OBD Codes

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Charge Air Cooler Bypass Control "A" Circuit /Open. This generic powertrain diagnostic trouble code typically applies to all OBD-II vehicles equipped with a charge air cooler. It is also termed as Turbocharger (TC) intercooler bypass actuator A - open circuit. Diagnostics Trouble Codes are codes that the vehicle’s electronic control unit generates when it detects malfunction or other issues. With this trouble code your vehicle will show up symptoms like excessive exhaust leak, hesitation upon acceleration, engine misfiring etc.

Technical description for this OBD II Code P022A is Charge Air Cooler Bypass Control A Circuit Open. This code is set when the ECM detects a general fault and / or opens within the circuit. It is considered generic because it applies to all makes and models of vehicles. Some fault codes indicate real problems with your vehicle and some indicate faulty sensors. The PCM controls and monitors the Charge Air Cooler Bypass Control Valve which controls airflow through the charge air cooler. PCM sets the OBD II code when the Charge Air Cooler Control Valve stops working to the PCM Signal. PCM may also defuse the turbo or supercharger to intercept further damage to the system.

P022A Charge Air Cooler Bypass Control A Circuit Open code is set when ECM discovers a general malfunction or open within the circuit. The Check Engine Light will stay on until the readiness monitor related to that fault has been reset and the sensor that was recorded out-of-range is seen as within range again.

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

• A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
• Faulty IMRC actuator relay (if equipped).
• Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
• Wiring problem
• Air flap actuator failure
• PCM failure.

1. Air Cooler Bypass Control Valve - As per its name this Air Cooler Bypass Control Valve allows turbo-boosted charged air to bypass a charge-air cooler, if this valve is faulty can create lots of problems.
2. Engine Control Module - The ECM/ PCM, it’s a crucial part of the vehicle’s on-board computer, which usually resides in either the engine compartment or under one of your front seats, it provides the brain for the engine of the vehicle and makes sure the timing and emissions control system work properly. So, if it founds faulty should be repaired or replaced as required.
3. Defective Fuse/Relay - Fuses and Relays though they are small parts but plays very important role in smooth functioning of your vehicle, so, make sure to replace them if discover faulty.
4. Pin/Connector - Make sure the Pin/ connector should not be corroded and have broken lock tab because these could become the main factor creating this trouble code P022A.
5. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.
6. Turbocharger - It’s a forced induction device that increases an internal combustion engine's efficiency and power output by forcing extra air into the combustion chamber. Replace your old turbochargers with us!

Below are the common symptoms for the code P022A. If you experience below mentioned symptoms please bring your vehicle to a reputable repair facility. Keep in mind; problems don’t get better over time unless rectified.

• Excessive exhaust leak
• Hesitation upon acceleration
• If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
• Low fuel mileage
• Misfiring of engine

The step by step analysis and diagnosis is recommended by a qualified technician using high grade diagnostic tools to check for all the problems and solving them. This may require the tools like OBD code reader, Hose clamp pliers, Lubricant, Basic socket, screwdriver and wrench sets, Battery terminal cleaner etc

• First of all locate the charge air cooler bypass control valve and make sure engine is in its off position. Once valve is located, inspect for any physical damage. If found faulty replace it.
• Verify the functionality of the valve by removing it completely. Please do refer to service manual as well while performing this and if possible clean the valve before reinstalling.
• Please inspect the wires involved in the circuit carefully, make sure they should not have any cuts or signs of corrosions.
• Check and verify the valve’s functionality by controlling it and observing it’s range of motion with the help of your scan tool. If you notice the valve sticking and there is nothing obstructing it, it indicates that the valve is defective.
• Verify the integrity of the circuit by performing numerous basic electrical tests with the help of multimeter.

At Parts Avatar Canada, you can find all the replacement and performance parts you need to get rid of any OBD Code problem at the best prices in the market and from the best brands, for any make and model. Explore now!

• 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.
• It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.
• Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame.
• Check for damage to the wiring harness connector.
• Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1.
• If a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.
• Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine.

Common Mistakes When Diagnosing the P022A Code

One should keep these few things in mind to avoid mistakes while diagnosing the error code P022A. Usually people miss on these things and commit mistakes.

• Always verify and record the integrity of your battery and charging system before troubleshooting.
• Make sure engine is off.
• Make sure to disconnect battery before performing any electrical repairs.
• Always refer to service manual first because it’s the matter of your costly vehicle.