Guide To P049C OBD Error Code Solutions

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The OBD Code P049C is set when the EGR (Exhaust Gas Recirculation) is not operating as requested. The code is set by the Engine Control Module EGM or Powertrain Control Module PCM when it detects this malfunction in the EGR.

The EGR system holds great significance as part of an automobile. In the new vehicles the EGR system uses a step motor to manage the rate of flow the EGR from the exhaust manifold. There are four winding phases in the motor, all of which operate based on the output pulse signal sent from the ECM. Following a sequence, two windings are turned On and Off, and each time the on pulse is sent, the valve opens and closes. This changes the rate of flow, but when no change is needed in the flow rate, the ECM doesn’t issue any pulse signal. For the valve to remain at a particular opening, a certain voltage signal is sent.

What causes this problem with Exhaust Gas Recirculation "B" Flow Excessive Detected?

• A defect in the valve of the EGR
• A significant carbon clogging in the EGR passage/s
• DPFE hoses are cracked or have completely collapsed
• Defective DPFE, MAP, or MAT Sensor
• The circuits going to the EGR valve or related sensors are shorted or open

1. Exhaust Gas Recirculation - Poor performance by the EGR is not good for the over engine of your vehicle, replace it or repair it if possible. If you’re skeptical about being overcharged by a mechanic, read through these pointers to be educated.
2. EGR Valve - It is responsible for correct transmission of NOx emissions try to repair it if possible. If that’s not feasible don’t fret! order online at Parts Avatar with quality assurance.
3. Engine Control Module - Also known as the PCM needs to be functioning efficiently. You can buy it easily at Parts Avatar online from the comfort of your home and have your product reach you within 3-5 working days.
4. Vacuum Switching Valve - Replacing the VSV may be the only option sometimes, Parts Avatar provides the best quality products for an array of vehicles, do don’t hesitate to place an order with us. We have satisfied over 100,000 customers with our service and products.
5. EGR Solenoid - EGR related parts can cause the OBD Error P049C, the solenoid is one such part. Repair or replace it at the earliest, click on the link and make your purchase.
6. EGR Vacuum - Check for leaks and level of functioning of the EGR Vacuum and accordingly repair or replace it.
7. Exhaust manifold - It is better to opt for buying a new exhaust manifold, as it plays a crucial role in collecting all the exhaust gasses emitted by the vehicle. We ship all across Canada and also provide free shipping for orders over CAD$99.

We have a wide variety of parts available on our online store, if you’re confused, you can speak to our online 24-hour Customer support agent for clarifications and guidance.

Having knowledge of the symptoms can help diagnose the OBD Code P049C and enable you to correct them efficiently. Two common symptoms of this error code are:

• Observed decrease in engine performance and
• An unusual increase in fuel consumption

Parts Avatar has the solution to correcting the OBD Error code P049C you may be facing. This error requires you to replace the EGR Valve with vehicle compatible and good quality EGR.

We have a wide range of high quality EGR system parts available for your car. Find one that suits you and get free shipping for orders over CAD$ 99.

Below are some simple steps to help you diagnose this error in your vehicle:

• Step one to begin your diagnosis will be to locate your vehicles’ diagnostic connector. Proceed to retrieving all the stored codes with the scanner and record the information. You may require this as the diagnosis progresses. Take your vehicle on a test-drive and observe if the code sets in immediately.
• You may also be able to find solution to your EGR system problems by looking through your respective vehicles Technical Service Bulletins (TSB). Match them to the vehicle, codes stored and the symptoms exhibited You can rely on them worry-free, because thousands of repair specialists are consulted before deriving these TSB entries. Hence, these can contain very helpful diagnostic hints.
• Use a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a vehicle information source that is reliable if the P049B is stored after you cleaned the codes in step one.
• You can now proceed to visually inspect the EGR valve. Also note any changes or disturbance of the related wiring and connectors to be thorough. Pay attention to the wiring harnesses found around the hot exhaust manifolds and the jagged edges which are often connected to the exhaust shields. You are looking for damages or odd textures of these wires.
• Next, disconnect all related control modules from the circuit. This is to prevent controller damage before testing resistance/continuity with the DVOM.
• Manually active the EGR system by using the scanner. EGR systems typically require a particular rate of speed before the automatic activation can occur.
• Now, you have to test each individual EGR valve circuit with the DVOM. For this use the wiring diagrams and connector pinout image located in your respective vehicle information source. There may be some circuits which do not conform to the manufacturer’s specification, don’t worry, these will simply need to be followed back to the source (Typically the PCM connector) and re-tested. After connecting if there is no signal detected from the PCM suspect a defect in the PCM or a programming error of the PCM. In this case you will have to either replace or repair the open/shorted circuits as per requirement.

Common Mistakes When Diagnosing the P049C Code

• Avoid these common mistakes while diagnosing this OBD error
• EGR valve has failed
• Powertrain Control Module (PCM) has failed
• Wiring is exhibiting issues