Guide To P004A OBD Error Code Solutions

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Do you know the reason why P004A code detects? It is all because of an issue with the turbocharger or supercharger boost control in the “A” circuit. A boost control solenoid is used by the engine control module to control the turbocharger so that the specific amount of boost can be provided. So now when inaccurate signal is detected by the PCM from the boost control solenoid, then P004A code would trigger. This code occurs if the boost level is less than 9 pounds or is above 14 pounds.

The “A” in the P004A stands for a particular chamber in the turbocharger, as opposed to a discrete constituent. Boost level of information is sent to the powertrain control module by the supercharger with the help of sensor input voltage signals. If the overall boost level is higher or lower than the manufacturer’s settings, then due to this the PCM won’t be able to command the boost levels and thus P004A would start appearing.

What causes this problem with the Turbocharger/Supercharger Boost Control “B” Circuit/Open?

The P004A trouble code can be caused by a number of things, including:

• Leaks in the vacuum
• Dirt in the air filter
• Stuck wastegate
• Some faults in the intercooler
• Bad connection between the inlet and turbocharger
• Poor connection between exhaust pipe and turbocharger
• Defective boost sensor
• Failed turbocharger/supercharger
• Inferior wiring or connections in the engine harness for the circuit
• Faults in the PCM (Powertrain Control Module) (Rare)

1. Powertrain control module - PCM is an important car part which should never be neglected. May be there is some fault in it due to which P004A code may start flashing.
2. Boost Control Solenoid - A faulty boost control solenoid can be troublesome. You can always rely on us as we have best auto parts for our customers.
3. Boost Pressure Sensor - If everything is alright with PCM, then there is surely some defect in boost pressure sensor. Get it replaced before the situation gets worse.
4. Vacuum - P004A code can display due to some vacuum leaks. So, it is very important to replace the auto leaks with us at equitable prices
5. Air filter - Do you remember when was the last time you got your car air filter cleaned up? A dirty air filter can cause a lot of issues like displaying P004A code.
6. Intercooler - A faulty intercooler can be a major reason why OBD Code P004A can trigger.
7. Turbocharger - A poor connection between the inlet and turbocharger can be troublesome. Get it fixed as soon as possible to avoid problems.
8. Exhaust Pipe - Facing problems with car exhaust system? This shows that there might be some issues with the exhaust pipe. You can always buy one from us.
9. Engine Wiring - Poor engine wiring can cause a lot of difficulties, so why not get it replaced at time?
10. Engine harness - Engine is the heart of a car. Take proper care of it as well as its parts like engine harness or else you might see OBD Code P004A flashing.

Willing to know some common symptoms of OBD Code P004A? Your wish is our demand. Have a look at them below:

Common Symptoms

• Check Engine Light may start illuminating
• Vehicle boost is over or under factory specifications
• Lack of engine power
• Increase in the amount of fuel consumption
• Uncommon noises coming from the engine bay
• Black smoke coming out of the exhaust pipes

Learn the ways with which you can correct this trouble code:

• Replace the wires as well as connectors in the system
• Releasing the stuck waste gate
• The air cleaner should be cleaned or replaced
• You can always get a vacuum leak in the intake manifold fixed from a mechanic
• The boost sensor should be replaced
• Replacing the intercooler would also help a lot

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of camshaft, wastegate actuator, engine crankshaft and a lot more. We are sure that now all your issues would be resolved.

• Fix if there are any vacuum leaks
• Replace the air filter if it is dirty
• The waste gate should be replaced
• Replace intercooler
• Make sure the connections on the intake and exhaust side of the turbo are airtight
• Change the defective boost sensor
• The turbocharger/supercharger should be replaced
• Repair or replace bad wiring in the circuit
• Replace PCM (Powertrain Control Module)

Common Mistakes When Diagnosing The P004A Code

The failure to comply with the overall standard OBD-II trouble code diagnosis protocol is the most common error when we are diagnosing P004A code. Adhering to the protocol step by step is very essential. This would ensure proper inspection, diagnosis as well as repair if needed. Whenever there is a simple fix, then the turbochargers surely get replaced like new wires, connectors or sometimes simple wastegate repair.