All cars equipped with an OBD-II system can show the error code P050A. This certainly requires a fix, and we look at this trouble code and how you can deal with it.
The error P050A indicates is related to the Idle Air Control system. To understand the details of the diagnosis, one has to be familiar with the IAC, cold start, and the powertrain control module that detects the problem.
What is Error Code P050A?
The trouble code P050A indicates a Cold Start Idle Control system performance. In other words, frequent encounters of cold starting your engine can occur. During this, the engine may not be at its optimum temperature to start at a relatively colder temperature. While it is considered normal, your PCM registers this error code when there is trouble in carrying out this normal procedure.
What does it mean to detect this error?
To understand the details of this code one should keep in mind a few terms: catalytic convertor, powertrain control module (PCM), and the idle air control valve (IAC valve).
When you start your car, the catalytic converter warms up to cut down on the emissions. During this, the idle air control valve lets in more air to increase the idle speed of the PCM. Once the idle speed is increased, it is the PCM of the engine that quickly heats up the catalytic converter.
The PCM attempts to attain the required engine RPM by enabling the IAC to increase or reduce airflow, depending on the engine RPM recognized by the PCM. The P050A code can be set when the PCM is unable to manage engine RPM using the IAC. It also activates if the PCM senses that the engine is not receiving the correct amount of air during the warm-up phase.
To sum up, the error code P050A occurs when the PCM detects a problem with the IAC system.
What are the symptoms of Error Code P050A?
One can suspect this by understanding the common symptoms that occur for this code.
- Increased or decreased engine RPM level
- Stalling of engine
- Starting trouble
- IAC valve showing tapping or popping noises
- Higher fuel consumption
- Average or below-average engine performance
What causes the Error Code P050A?
The possible causes of this error code are mentioned below.
- Clogged air filter
- Defect in the IAC valve
- Fault with the powertrain control module
- Throttle body assembly failure
- Issues with wiring
- Component failure in the ignition system
- Open or short circuit
- Problem with the electronic coolant temperature sensor
- Vacuum leak
How to diagnose this code
When attempting to diagnose this code, it is essential to consult the information source built into the car, a diagnostic scanner, and a DVOM (digital volt/ohmmeter).
Diagnostic flow charts, connector face views, connector pin-out charts, wiring diagrams, testing procedures, and specifications are looked at before starting the procedure.
- A visual inspection of the IAC valve and all of its related wiring and connectors.
- Examine the wiring just above the engine for signs of damage.
- Look for carbon buildup in the IAC valve and seat.
- Clean the valve if required.
- Test the IAC motor using the digital volt ohmmeter (DGVOM). If the motor doesn’t match the specifications, then it is faulty.
- If the IAC motor meets the specifications, reconnect the IAC motor connector.
- Check the input voltage circuit and ground of the IAC connector. However, if the voltage is within the manufacturer’s specifications and there is no ground, the fault could be at the IAC valve or the motor.
How to fix Error Code P050A
Since the troubleshooting and repairs vary from one make and model to another, there are no one-size fits all solutions for this error. However, there are a few things you do to fix this error.
- Repair or replace damaged, open, or shorted connectors or wires in the IAC
- Clean the carbon buildup in the IAC valve.
- IAC motor replacement.
- Replacement of IAC valve.
What should you keep in mind while resolving P050A?
When you check for the error code, if you see other codes along with P050A, it is important to resolve these codes in the order in which they were stored before attempting to diagnose P050A.
If you are moving forward with cleaning the valve, use an approved solvent to clean all carbon deposits off all visible surfaces, along with the pintle seat and throttle body, if required.
Can you fix the code yourself?
Since a certain level of technical knowledge is required to fix the issue, it is always better to seek professional help. This is also because the error code P050A is accompanied by a host of other codes. However, you can run a diagnosis if you face any of the symptoms.
How much does it cost to fix Code P050A?
The rates for fixing this error can vary with your location and the involvement of other trouble codes along with it. However, most of them can charge between $75 and $150 per hour.
Sara Sam may not look like your typical car and finance expert, but don’t let that fool you. With over four years of experience in the industry, she knows all the ins and outs of cars, car insurance, and refinancing. You can trust Sara to help you navigate the often-confusing world of automobiles and financing.
